the art and science of sharpening.

Although he was the grandson of the blacksmith, on his farm he \"played\" with the blacksmith and spent seven years in tools and diemaker (
Professional grinding knife)
The corner of art admitted that his knowledge of the industrial process was outdated.
That\'s because he went back to school in his early 70 s to do his PhD. D.
Now he lives as a psychologist.
He still does some grinding for his friends. . .
He may do so again if necessary.
I don\'t know if the following information is \"out of date\" but one thing is for sure: it\'s light --
Many years earlier than most people know the tools.
Art Corner 6 South Fork Road.
NC 28753 security first Marshall: one thing to remember to sharpen any used edge tool is that it is an inherent dangerous task.
If one is not very convenient (i. e.
Have decent eyes
Hand coordination, etc. )
They may get hurt, maybe serious, trying to grind.
I was skilled and convenient, I had eight stitches at the end of the afinger, had a scar and I lost my attention there too --
Sharpen the knife quickly.
The knife did what it was supposed to do and did not hesitate to browse through my tissue.
I had other blood.
Cuts and slashes pouring out of the grind, as well as mistakes near some explosive grinding wheels.
I always check my hand position, machine guard, etc when grinding knives.
Ask yourself, \"What will I do if the worst happens?
\"Sometimes, after this issue, I adjust the way to hold a tool or story.
Many other things can cause accidents when dealing with sharp tools or electric cutting or grinding tools.
I \'ve heard of an experienced woodworker who lost four fingers when his big dog jumped on his back, probably joking when he was cutting a piece of wood on the whistle saw
People are always injured when they get under the mower without pulling out the spark patch.
You have to think about these things and decide whether you are convenient enough to address them and the level of risk you are facing.
If you are inconvenient and don\'t want to take the risk, you may decide to bring your grind to proif.
On the other hand, sharp tools work better, control better, cut cleaner, require less effort, follow the cutting line more accurately, and usually improve the quality of our work and life.
I hope that what I have to share will add to the averagehomesteader\'s understanding of these key tools and make an informed purchase decision when replacing the worn out tools.
Tool material we need to consider what the tool is made.
Glass (obsidian)
Cutting Tools for Flint Stone, quartz, bones, antlers, shells.
These are historical options for arrows, scraping, cutting and weapons that have been widely used.
These are very effective tools, and if you know that the forklift is better than steel even in terms of working leather, it depends on who you talk.
The antlers \"lu\" used for dividing logs are also the preferred steel for many craftsmen. Some(very small)
The surgical knife is made of black obsi stone because it is able to maintain a sharper edge than anything we have.
All of this requires professional sharpening skills.
There are many such scenes in the seminar.
Some of these skills can be revived by self
Teach craftsmen. Heidi Knecht (
Hunting techniques in the late Ice Age, Scientific American, July 1994, p. 82-87)
, Using the copied \"Ice Bag Program\", from period35000-
22,000 BCE and tested on the body of the goat.
She found that these complex tools were up to the job.
They can go straight through the spine of the target.
Nicholas Toth and his colleagues
Scientific American, July 1992, pp. 88-93)
Studied a Highland village in New Guinea where the stone axe was old
Stay stylish by taking a nap and grinding.
The technology used by these people may remain unchanged within 10,000 years.
The shaft is ground on sandstone with a water lubricant for final grinding.
People there use it.
Flaky edges for light hunting-
Types of work, as well as more solid ground edges for agricultural work.
Two men can use the axe to cut down a tree the size of a telephone pole in three minutes.
Hard alloys, titanium and ceramics are also used when cutting.
In the same application, it is very useful for Cemented carbide or \"cemented carbide\" to tilt rotating saw blades and router drill bits, usually better than steel.
They are everywhere in carpentry.
Tungsten carbide is a diamond grinding equipment for grinding.
I did a lot of this sharpening in the tool store.
Since it requires specialized equipment, no one should try it at home.
Titanium Knives have entered the professional tool market, and special power equipment is also needed to sharpen. The newU. S.
The underwater knife of the Navy SEAL team is titanium, which is very useful when performing tasks and can be opened with a magnetic knife
Trigger an explosive device underwater. (Titanium is rightmagnetic. )
If you do a lot of these things on the farm, you might want one of them.
Bronze cutter.
They are very novel.
You know why with one.
Then you will know why our ancestors will give up their bronze tools as soon as possible and turn to iron.
Ceramic knives, such as those from Boker, are very expensive and are described as highly wear-resistant.
I don\'t know how you will grind.
I don\'t believe the claim of \"wear-resistant\" materials.
Even the diamonds wear during cutting and grinding work: I have worn a lot.
I prefer to use steel in most applications, using carbide saw blades and router drill bits in their niche.
Most knives are made of steel.
The steel is based on iron, which is related to chromium, vanadium, nickel, magnesium, manganese, cobalt and-
Very important. carbon.
In determining the hardness of the steel, the percentage of carbon in the steel is the most important.
This mixing process is called \"alloy\" and various components are called \"Alloy \".
There are many kinds of steel, dazzling.
For our purposes, tools are usually made of steel that can be hardened and tempered.
Hardening, tempering and annealing are achieved by exposing steel to hot and cold cycles.
These processes are collectively referred to as \"heat treatment \".
Heat treatment changes some aspects of the grain, crystalline pattern and chemical/Crystal structure of the steel.
The hardness and toughness of steel are determined by alloy profiles and heat treatment processes.
The formula or chemical formula of these two kinds of steel is the most important.
Although it seems strange to talk about the relative hardness or softness of steel
Everything looks tough if you bite it
This is an important factor.
The common hardness measurement of steel is expressed in a Rockwell unit or \"Rc.
Functionally, the scale range100.
Rc 100 is the hardness of the diamond.
Most of the \"soft\" or \"machined\" or \"soft\" Steel is lower than about Rc 18.
Most tool steel works in a \"soft\" state.
Knifesteels hardened to Rc 55-61 range.
High performance tool steel is hardened in a higher range.
There are several types of hard alloys that become very hard.
There is a way to estimate the hardness of the steel by using the file.
The details of this are in the Andrews book \"hammer edge\" mentioned below.
Hardness refers to the ability of materials to resist Diamond penetration
The pointed probe is realized by \"hardening.
\"Toughness\" refers to the ability of steel to resist plastic deformation, which is brought about by the process called \"tempering.
\"In general, hardening involves adding steel to 1400-1600 degrees F. (or more)
, And quickly \"quenching\" steel under heating
Absorption media such as water or oil.
The simple hardened steel is quite brittle.
The tempering process involves re-heating the steel to a lower temperature of 400 [degrees]-650[degrees]F. )and quenching.
This process may be repeated several times, and it may be possible to use exotic quenching materials such as acetone for \"ice tempering\" in dry ice \".
\"Annealing\" includes heating to a high temperature range and cooling slowly, as in a bucket of hardwood ash.
Annealing loses the hardness and tempering of the steel.
Steel that can be hardened, etc.
, It can be called \"tool\" steel, and it can be called \"mild\" steel without hardening of chemical composition.
There are many ways to describe steel, and these terms are specifically introduced throughout the manual.
The meaning of all this for our purpose is that some tools are very hard, such as fine knives, razors or chisels;
There are also some soft ones, such as corn knives, lawn mower blades, etc;
You need to know something about this to improve and maintain them.
Soft steel can be sharpened with documents, but hard steel will become dim in the documents.
You will not let the hard blades be exposed to sharp impact for safety reasons, as you can break them.
Axe, Mower Blade, Machete/corn knife, etc.
All of these are relatively soft or mild steel, as they must be able to \"give\" instead of breaking when encountering stones.
The ability of hardened/tempered steel to absorb deformation blow is limited.
The hammer head is specially hardened and tempered to create a strong impact within its design range.
Big tools like hammerheads, axe heads, and most blades are \"zone hardened\" or \"zone tempered. \" This.
Means work (
Cut or beat)
The edge is harder than the back edge.
The less hardened parts of the tool are designed to act as shock absorbers for the harder and brittle parts.
The completion of the heat treatment process in this area is a skilled process.
If you put your big hammer head in the open fire and burn the broken shaft parts from the eye hole, you will pull out the temper of the working face and when you use it to hit the wedge, the face will be deformed.
You can then defend your ignorance and condemn the tool as \"made cheaply \".
\"Until the 20 th century, individual craftsmen were producing tool steel in small quantities.
It was an alchemy, and until this century there was little known about the nature of chemical elements.
Tool steel was not really standardized by a numbering system until World War II.
Several parallel steel marks are currently used.
These include SAE (
Society of Automotive Engineers)
System, AISI (
American steel Society)letter-number system.
In general, I only found the ISI number code on the tool that was commercially produced.
In the 20 th century, as we learn how to make tool steel, the size of the available tool steel blocks has increased. The long-
A prominent problem is that it is difficult to obtain a uniform and thorough mixing of steel elements and the annealing of the original steel billet of the steel, and it is not really perfect until the later period. WWIIperiod.
Before that, the \"hard point\" is common in the soft state of the tool steel. If you encounter these hard points when processing the steel, they will tear your tool into pieces.
In 1960sI, these old steel with hard points are actually studied.
They crushed the carbide cutter.
When you are dealing with old tools, anyone can guess the steel type in it.
In the early days ,(
Virginia colony, for example)
A small piece of tool steel was obtained and welded (
Remember they didn\'t have arc or other modern welding techniques at the time)
The working edge of the tool.
A relatively large soft steel will be shaped into an axe head or hammer head and a portion of the tool steel will be hammered-
Weld to the working edge.
Under these conditions, the preservation of tool steel is essential.
Now taking everything away will be considered a waste of time and a tool will be made of steel.
Tools get hot.
Make different parts of the steel have different degrees of hardness and tempering.
Note, however, that some tools are still made using this technology.
The core of the \"laminated\" steel knife is the high hardened steeland outer layer which is shock absorbing or stainless steel.
Although all kinds of great tool steel are cheap, this does not mean that tool manufacturers use them.
Another problem for knife holders is that there is no ideal knife-holding steel commercially.
Considering the size of the knife-holding market, I think this is great, but I \'ve been reading articles about the knife-holder trying one or another steel for the fit.
There\'s an angry re-
Some people like rolling bearing steel very much.
Karl Schroen\'s hand forgotten knife is a review of the knife
Manufacturing performance of 12 tool steel extracted from 7 categories of tool steel.
Shron is master bladesmith.
This is an advanced text for individuals familiar with forging blade manufacturing. Case-
Another kind of steel that appears on the cutter, hoping to be called \"surface hardening\" as the degree of rarity increases \". \"Case-
Technically hardened)
Is it already the cooking process?
Make parts in the environment (
Usually a container of steel)
It is isolated from the actual flame and contains carbon supply.
At very high temperatures, the carbon is absorbed onto the surface of steeland, creating surface hardening.
This is a practical technique for improving wear resistance and is widely used in barrel and mechanical parts.
However, in the work of the knife, it has two liabilities.
First, the surface hardening will produce more brittle steel.
I know the cheaper version of this knife can be cut on sharp edges.
The second responsibility is that the knife is the reason to sharpen them, and all of us who have had this experience --
The hardened tool we actually use very often has the experience of grinding to soft steel after surface hardening, and soft steel will not have too many edges.
I have never advised people to buy or rely on casesHard knife.
Finally, the problem of stainless steel.
From the tool point of view, most stainless steel is soft. (
Technically many of them are also easy to dye, German term \"rust\"
\"Free\" is a more accurate description of its unique attributes. )
Many stainless steel is not very good in hardening or edge.
The speed at which a kitchen knife is produced in an automated factory can explain some of these reasons. Martensitic (hardenable)
Stainless steel is very sensitive in narrow heating range, heat treatment is more difficult than heat treatment of ordinary tool steel.
The environment in which the producer is located requires strengthening quality control when producing the lowest productpossible-price market.
Guess what will happen.
Because of this, many Americans have become accustomed to using the ever dull stainless steel kitchen knife.
In addition to the expectation of dullness, we have developed a series of dangerous behaviors around the knife, including free contact with our fingers to the edges, and using the dishwasher without seeing what we are doing. on our feet)
Throw them into the pottery (This slows them down)
, Open the package with them (
So they Bend)
Store them in crowded drawers with other knives (
This leads to a gap in the cutting edge)
Finally, use great force to cut anything.
Manufacturers mainly produce \"440-B\" and \"440-
C \"stainless steel.
Hardened stainless steel includes specified 44-Band -
C, 154 cm, Bg42, 440 V, ATS-34.
These pieces of steel are difficult to process, so the resulting knives are expensive.
In my experience, if their knives are made of numbered stainless steel because of the price premium they want, the knife maker will always promote the fact.
Good news: I will review some new technologies where the stainless steel knife in the ordinary kitchen can be sharp relatively easily.
They don\'t stay for a long time, but they can be sharp easily.
What is a sharpening knife?
Anything that increases the sharpness of the cutting edge can be considered \"sharp\", although traditionally several parts of the process are given different names to Polish, Polish and scratch.
I will consider these processes in detail below;
However, they are divided into two techniques: drawing and removing inventory. (
Swing knife is a kindbetween. See below. )
Traction technology can be hot or cold, beating the thin edge of the tool with a hammer and a hammer, such as a sickle blade or an axe, pulling out a thin piece of metal along the edge, create a new, sharp edge.
The blade can be cold.
Drawn in this way, with a small hammer and a small hammer mounted on a fence post or stump.
Shafts, picks, digging bars and other large tools can be hot
By heating the forging of the ina blacksmith, with (minimum)
There are three pounds on a big hammer.
Then they need to re-heat-
The heating process changes their metallurgical properties.
\"Hot painting\" or \"hot grinding\" is a traditional forging technology that was considered a very big trade in the past.
Anyone who wants to learn the blacksmith should read the subject and attend classes.
You can\'t just learn this from books, although you need to know some of the tricks in the books.
The best introductory book I know is Jack Andrews\'s hammer edge, a blacksmith\'s Resource Book (Skip-
Jack Publishing House, 1991).
Excellent introductory courses for basic blacksmiths are taught by Frank Turley of Turley Forge, Santa Fe, New Mexico (address below).
The main resource center supplied by the blacksmith is Centaur Forge in Burlington, Wisconsin (414)763-9175 (seebelow).
File filing is a technique of using documents on relatively soft steel surfaces.
It can be considered a very rough way of grinding.
The metal removal theory is similar.
Because grinding aliasing is impractical, filing is the only way to grind most handsaws.
The exception to this is the chain saw and the bow saw blade, which will be discussed later in the article.
Although it is easier to grind the rotary mower blade, it can be filed.
Machetes and corn knives can be filed.
Archiving is done in a cross way
Cut or draw-filing motion. In cross-
Cut archive a file through the edge or area of interest, push down as you move forward, and release the pressure when you go back.
When you grind long edges on an axe or a machete, it causes many small flat points. Cross-
Cutting filing is the best way to stock up or remove large stocks.
In order to get a smooth cutting edge, you have to mix the flat spots cleverly when you are done.
One way to mix an apartment is to first file the lowest apartment, for example at a deep notch on the axe blade.
Then, when filling adjacent points, place about 1/4 of the width of the file on the initial flat point and stop archiving when you reach the initial flat.
You can also draw
Documents to complete the cut.
The general rule of thumb about the roughness of a particular job file is to have a good enough file so that at least three file teeth are always in contact with the job.
This is also the rule of crafting.
A powerful saw blade that cuts anything. Draw-
Archiving is the process of pushing or pulling a cut edge on a long road. (
The file tooth can be single cut or double cut.
View the file face to determine this.
The double-cut File face looks like an Xs field;
A single cut surface looks like a parallel line. )
This causes the surface to be relatively smooth and used as a finishing technique in some old gun and knife factories before heat treating parts.
The key in the lottery document is to have a well
The supported work piece, usually clipped on something similar to the top of the bench or the fixture of the bench, is relatively clean (new)
Files and file cards or alternate tools, clean up the file fragments in the file slot after a few pens.
Depending on the tilt of the file teeth, you can pull or push it, or you can reverse it if you like to pull or push.
In general, hand-pulling tools are easier to control than hand-pushing tools.
This is the reason for Japanese wood.
Working tools are the exact opposite of Western tools.
Fast filing on relatively soft steel tools is not a bad way.
It\'s a big job if you need to take off a lot of steel, but so is any other technology.
Grinding all grinding techniques will destroy the metal of the cutting edge of the tool.
Drawing technology is more conservative in terms of breaking tools than removing inventory or grinding technology.
In the course of wear, grinding and other techniques to remove inventory will waste more tool steel.
The technology to remove inventory includes several varieties of grinding agents and scratches, which are cut off of unwanted materials with harder materials.
I will also discuss some mixed forms.
Grinding with grinding wheels, sandpaper, grinding stones or diamond discs involves moving the grinding surface to the steel and removing the particles of the steel.
During this process, the grinding surface will also rot, shedding particles and matrix.
Grinding surfaces like grinding wheels create wear because they are made of very hard tiny particles that are fixed in the \"Matrix\" by \"particles.
\"The Matrix is usually ceramic, and under a microscope it looks a bit like a sponge with air holes on it.
Particles of various natural or man-made materials such as alumina, industrial diamonds, Garnet and other substances.
When worn in contact, the sand will scrape off some small scraps of steel that look like any other small scrap under a microscope (
For example, from a milling machine or a manual file)
When we see more glory
In the process, some small shavings
The technical term \"dust\" refers-
Instead of flying off the surface, it is embedded into the matrix.
This is what is called a \"nail tie\", and the surface of the end grind is filled with this dust, and then it will shine.
The larger the fixed amount, the less cut.
However, at the point of contact, the energy is still converted into heat, and when the wheels are glazed, anything we grind becomes easier to burn.
In the design of grinding matrix materials, there are a large number of engineering projects that will be carried out in a special way.
Some are designed to grind out new sand.
Some are designed to not fall off and have to be decorated with diamond or diamond.
Some wheels are \"soft\" and some are \"hard \".
\"Some are running under the water bath, some are dry.
The old rule of thumb for tool stores is that \"the softer the steel, the harder the wheel is, the softer the steel, and the softer the wheel is.
\"Hard wheels that hold the shape are used for\" contour grinding \"in which the shape is engraved on the surface of the wheel and then transferred to steel.
This is usually done only by professionals;
However, I have seen some simple solutions for wheel shaping to sharpen the bow saw blade.
In most cases, the smoothness of the grinding depends on the size of the grinding granularity.
The finer grits should produce a smoke surface.
Engineers and real professionals use their Micron to describe the surface
Scale deformation, such as \"five micro-meters \".
Most people only worry about the \"rough\" or \"smooth\" grade of the surface.
The particle size of the grind depends on what particle size the grind will pass.
10 capsules a grain (
This will be huge)
Will go through a screen consisting of 10 wires per inch, but not 12 wires per inch.
Gritwill, which is 1000 in size, passes through the screen and has 1,000 wires per inch, but no 200 wires per inch.
Grits functions range from 40 to 600. (I know, I know. . .
Floor Sanders uses Titanic grits.
But don\'t try to grind a steel knife with a floor sander. )
This is the American method of measuring grits.
Measure Japanese water with different systems.
Initially I saw ads for 6000 and 8000 sand and water stones and felt lost.
I will talk more about Japanese rocks later.
Industrial diamonds are cheap and easy to buy in some form.
Diamond grinding wheel (
It was not cheap when I checked last time)
Diamond particles with obvious orientation in the carcass.
Used for cutting carbide and ceramics.
Diamond plates have become very common and worth mentioning.
Diamond boards are not bad in shaping hardened steel, as will be found in most knives.
\"Single Crystal\" diamonds are special diamonds grown in the shape of small needles.
They are matrix-oriented, with one end facing the top (or workingside)
One of the matrices is to the bottom.
When you use these plates, the grinding action exposes its cross section when the diamond is worn out.
It is easy to see tiny edge points on the surface of the plate.
The surface of the plate is also covered with a small hole in soft plastic.
These holes are designed to reduce sand grains and play the same role as the jagged tooth groove to remove debris outside the cutting area.
General purpose grinding procedure with severe abuse, Notch or deformed edges, grinding usually starts with coarse sand and then performs finer grinding.
Whether you use your hands or calcium carbide, this is true.
Some edges, like my axe or machete, are fine with rough grinding on the edges, and I don\'t bother to refine the surface to \"a five micron finish \".
Rough grinding is sometimes called \"forming\" and generates a lot of heat when using power tools.
Due to heat and the possibility of \"burning\" tools, many sensitive people place containers containing water near their grinding machines and immerse the tools in the water to avoid accidental heat treatment, thus damaging the edges.
When the edges start to change color, you are already burning very late.
Please note that you can overheat and burn the thin tool edges with any rough sand.
Many carpenters like to use water bath grinding to avoid expensive tools.
Water Bath grinding is more expensive, but safer for edges and lungs.
It is also very troublesome to use because there is water everywhere.
Still, I like most common grinding.
Dry grinding produces flying sand and steel clouds that the operator sucks in.
This is very bad for your health and can cause all kinds of serious lung problems.
The water bath Mill does not produce anything like the flying dust produced by the dry mill.
In industry, we use a precision exhaust/vacuum system to control the dust.
These huge and expensive systems don\'t work perfectly, which is not possible for individual stores.
When the spark is still alive, I will not connect the vacuum of the store to my grinder, and when it is blown by air, it will continue to burn and ignite anything around it.
My compromise with the dry grinder was for outdoor use with a mask.
If I can\'t get out, I sometimes wear a mask and blow a fan in the work area.
I try to reduce the use of dry grinder.
Also be careful with sparks.
In industry, when I was grinding the lathe drill bit, I put a rag behind a large dry bench grinder.
I don\'t know the debris on the path where the grinder sparks.
I lit the rag. Veryexciting.
Bathtub grinder includes several types of plates
The support in the shape of the rotation on the horizontal plane, as well as several traditional double wheels running in the bathtub.
An unusual new type of grinding wheel (
On the Tormek machine)
Use a rough wheel in the roughest work and use a special trim to convert the wheel surface to a finer sand for fine grinding.
Since I have never operated this machine, I would be skeptical about these claims except for the few people I trust who sold them and swore to them. (
See Highland hardware and country workshops below. )
I have a version of a flat rotary grinder with three stone heads: acoarse 120-
Sand Green Wheel, 1000 and 6000 sand (
Sleep System in Japan).
I asked the machine to re-polish the long joints and shavings for my shop.
For this, this machine is as good as any professional machine I use in the industry. (
A ranch from Highland hardware.
Similar machines can be widely used. )
I have been using this machine on ax blades and doing some bare-hand sharpening of various other blades.
Tormek seems to have the best fixture and fixing system for the widest range of blades.
This is the key point of a lot of grinding: you need fixtures and fixtures to make the most of the equipment.
The basic edge shaping is done with the roughest grinding medium.
After rough grinding, what you have to do is refine or polish the edges through a rough grinding procedure.
In some cases, I might start with a rough branch-like diamond, which is the case with the mower blade.
In other cases, I can start with a 120 sand on a wet grinder or similar hand stone, fix the edges that have been abused, and then continue to use finer sand.
When I re-grind the knife I have already ground, I usually grind it finer first, because the basic edge shape is still intact and I don\'t need to stock it in large quantities.
There are some special finishing and balancing techniques for different tools that I will look at below.
I follow the general procedure of most grinding here, including the procedure of grinding with wet grinding wheel, sandpaper, hand stone and Diamond plate.
When using a dry grinding wheel, you need to keep in mind that they cannot be installed from the box to the grinder without \"trimming\" or \"trimming\" operations.
Shaping is a process that lets the wheels run in a real circle.
This is achieved by resting the tool against its surface and grinding the eccentric material when the tool is first started.
This is a very troublesome process.
The wheel must be reinstalled each time it is disassembled and reinstalled.
In industry, fine grinding wheels will not be fixed on a knife pole with anut like the cheap bench grinder you will buy for a home or home store.
Real industrial wheels are mounted on \"feathers\" that will never be removed until the stone is scrapped (
Or if they or wheels need to be reinstalledtrued).
Quills are mounted on the tapered shaft.
Wheel is re-formed due to tapered parts
Installed in a very strict tolerance range, in its tilt mode.
In this way, we can cut the profile into wheels, remove it from the machine and reinstall it without losing a lot of time or grinding the surface.
This is the best tool grinding machine in the world, Brown and sharp 13 global-type grinder.
Large grinding machines such as large surface grinding machines do not use goose hair installation.
The finishing tools currently available include rotary wheels, hard diamond sand hand stones (
I prefer it)
And industrial diamonds inlaid on brass rods.
On the homestead, the tree holes may be as complex as you need, but diamonds are the best.
Trimming the surface of the wheel includes cleaning the nailed fragments outside the small holes in the grinding matrix.
Usually I run a carborundumstone on the surface to do this.
This is done by letting the wheel turn under power and fixing the stone to the tool holder, so that the surface of the stone can contact the wheel at an approximately tangent angle.
I moved the stone over the surface of his wheel.
This worn out part of the surface of the wheel.
When diamonds are installed in a fixture to prevent them from bouncing back to the surface of the wheel, they do the job equally well or better.
Big stones are usually big enough that you can hold them down with enough friction to prevent them from rebounding.
Please note that since there is a pin on the surface of the wheel and must be cleaned, any small sealed electric \"knife cutter\" found on the back of the opener or other appliance will eventually stop working.
If you can\'t disassemble the machine and put makeup on the wheel, it won\'t work in the end.
I always think these things are a waste of time.
Typical grinding wheels are not made to resist side pressure.
Don\'t use them on the side.
If you want to grind with the side of the wheel, then buy a wheel made for this purpose.
Wheels in the shape of \"dish\" are usually made for this purpose.
Therefore, the manufacturer should specify the wheels used to resist side grinding.
This is a serious security issue.
The explosive grinding wheel can cause damage. Respect them.
My grandfather took a look from an old-fashioned sandstone wheel.
I have a friend whose father was killed by a large high-speed wheel passing through his skull like a bullet.
I blew up three rounds myself.
Worst of all, I didn\'t check if it was installed correctly before starting awheel.
The 90-pound motor is driven by a 30-horsepower motor at a speed of 1000 rpm.
When it\'s broken, it throws 10-
Under the leadership of the guard, the debris was smashed out.
When they encounter solid objects, they spray out like a debris grenade.
No one was injured.
Because of this episode, I believe in God\'s intervention.
Most of the wheels offered on typical mass market grinding machines are made of carborns.
I only use these in rough apps.
It is easy to burn with these things, because the wheels do not fall off, so it is easy to be fixed.
If I am careful, I can use one of the tools to be quick and sharp on the mower blade or machete.
Most hardware stores have \"coarse\", \"medium\" and \"fine\" grade grinding wheels.
This classification seems to refer to granularity (mostly)
And the end of the matrix in the wheel.
In fact, the particle size and brittle breaking of the grinding wheel (flake quality)
Composition of matrix, particle composition, etc.
You\'ll see that some of the wheel\'s labels exist in the form of a long string of letters and numbers.
Typical consumers may have to settle for the color-coded trio mentioned above as well as the ubiquitous diamond wheel.
It doesn\'t matter because you may grind the same thing over and over again.
If the wheel is not working properly or the material is burnt out, change one.
Hand-held or \"body\" sharers are widely sold with many different cutting wheels.
They are high speed (10,000+ rpm)
Tool, most of the mounting end of the wheel is outside the shield.
They are really a professional tool that moves to the amateur woodworking market in Europe and then to the United States.
Although these things are useful, they are very dangerous.
Take some advice I got from a friend: If you need one of them, getone, you can\'t lock the \"on\" position!
A guy grabbed his shirt and cut a 3 feet-long trench in his belly, passing through the other side.
Because of this story, I am trying to buy some power tools that cannot be \"turned on.
Grinding is different from grinding.
During grinding, a matrix maintains a spirit for a piece of work.
During grinding, the two surfaces are rubbed together and a sand is placed between them.
On a harder surface, the sand will be deposited on a harder surface.
Grinding is usually a special process.
I flattened the large surface with grinding.
For example, the diamond sand grits is placed on a soft steel plate on the bench, moistened with water, and the surface is hard, such as chiseling, moving in a digital eight mode. (
You must use the figure 8 pattern when grinding or grinding in any plane to avoid repeated hard spot digging in one place on the surface of the tool and carving a hole there. )
When grits crashes, they re-
Stick to it and cut more.
This process produces more and more fine cutting media, and can produce impressive flat and smooth surfaces with a lot of practice and skills.
Barber\'s power cutter is flattened in this way in the power turning circle.
In a university model store, we used a turntable with wet felt pads with Bon Ami cleaner on it, and circled the scratch marks on the organic glass block containing the biological samples.
Stroppingstroping is a technique for removing fine burrs generated by grinding edges.
When stroking, you drag the tool with a sharp edge and drag back and forth on some softer material.
Most of the rubber is made of leather or linen.
I found that the denim material in cotton blue is very effective for small blades.
The idea here is to bend the burrs to the sharp edges and break them.
On long knives, this burrs are sometimes called \"wire burrs\" and after being bent, it can be pulled out like a wire.
At the micro level, the steel is very flexible and these burrs pile up when the steel is bent by the grinding material.
If you don\'t remove them, burrs weaken the new edges by folding over the new edges.
Some Waterstones manufacturers advertise that Waterstones sharpen sowell, but they do not form burrs.
I noticed that the burrs formed by my Waterstones are much smaller than that of the Oilstones, but they are not burrsfree.
I also use MicroOblique mouth strategy (Explained below)
Further reduce burrs.
Still, I stroked the edge of the fine tool.
Wire burrs may be desirable in some applications because they are very sharp and will be cut in a short time.
During an operation I was involved in slaughtering pigs, farmers used scratches
Quickly Lift the steel wire Burr edge on his big knife.
Then he will do a few more.
Scraper mouth.
I don\'t believe he understands the basics of the knife grinding, I do worry about leaving small pieces in the meat we pack, but he is able to keep the knife opening for a long and hard day.
Polishing is a technique of refining the surface of the cutting edge by charging the electric wheel (usually cotton) with a grinding particle called Apollo or a polishing compound.
The purpose here is to produce a \"mirror finish\" on the cutter without lowering the cutting edge or producing another Burr.
I never use this technology.
It is true that in some cases the mirror will be smoother and better cut than the rough mirror;
However, it is very easy to quickly destroy your tip in this way.
Polishing is done with the edge face away from the polishing wheel, but you do run to the edge.
If you don\'t have the right angle or don\'t keep in touch with the wheel, you may wear out from the new edges.
This finishing technology is mainly used for the woodworking processing of the lathe.
In this case, it makes sense because they need very clean finish cutting, the tool will last longer if the cutting is correct, and it will cool down between re-cutting.
The term does not have a single meaning in English.
It is said to refer to the grinding process and grinding tools.
It has become a common language in phrases such as \"hone your skills\" or \"hone your skills\" and is used as a disgusting literary reference.
In industry, we use the \"honing mill\" for fine grinding, such as the refinement of the bearing surface.
These machines use fine grinding stones and oil baths that are usually placed in special fixtures to complete the task.
In the modern world, the word \"honed\" refers to a wide variety of grinding and cutting tools, most of which are related to the preparation of edges.
For my money, the word \"grind\" can be replaced by the word \"grind.
Scraping has a special and useful set of sharpening tools that are marketed as \"hone\", \"sharpeners\" or what their marketers call \"hone \".
Some of them are very useful in sharp kitchen knives and scissors.
Scraping is a more general method of surface preparation in which very hard, usually carbide, the drill bit is scratched on the surface, a bit like the paint scraping we use
You use these tools to pull them down from the edge of a knife or scissors.
I have never seriously considered these issues because of the old type that I have dealt with, there are very few round hard steel discs that produce a nasty line Burr and produce a short onelived edge.
This is the kind of meat cutter my friend used to grind a pork knife.
When using typical stainless steel kitchen knives, the new varieties of these roll knives are much better than grinding.
The new variety uses the two carbide drill bits set in the plastic housing at an appropriate angle (
You need different knives or scissors)
And pass the edge through V-shaped gap.
These sources are given below.
I mainly see these prices between $6 and $12.
The carbide drill will eventually wear out.
I have a reversible bit.
I told you to get a replacement bit cheaply.
The reason these forklifts work is that they actually scrape off the area behind the blade.
The ones I chat back and forth are actually doing a micro
Jagged edges because they grind.
Now, the roofing workers are grinding knives with these.
This is very effective for them.
You can also sharpen the curved edges of the alinooleum knife with these quick grinding.
The reason why I use and recommend these spatula to make a kitchen knife is because you didn\'t do anything to sharpen the kitchen knife would be better than these.
Typical stainless steel kitchen knives usually use such a soft steeland that the edges quickly erode no matter how sharp you are.
These spatula have little time to work compared to other methods.
Before you take the knife to the store and grind it with a sander or grinder, or take out the hand stones, you can grind them with these spatula.
Another advantage of them is that the forklift does not require much skill.
These knives do produce scrap steel and you need to wash off the knives before using them.
If you\'re grinding fine tableware like the name --
Cutlery for Swedish or German brands, these spatula may not work very well because these knives are usually made of harder steel, and someone in the factory may actually supervise the heatingtreating.
I won\'t use thescrapers on 440-type stainless.
I also found that the forklift is a way to quickly grind a large forklift (
I know, I know, the edge of the kitchen knife should be thicker when you use it outside.
Nevertheless, it is a chore that these shovels will soon lift an edge on cleaverright and set up a shoveling machine to grind it. )Sharpening-
What are we trying to accomplish?
Knife, shaft, and simple single edge: The Edge refining technique mentioned above constitutes the main method of grinding most of our tools.
When we try to improve the edge, we need to remember what the final product should look like.
I\'m going to talk about some basic tool geometry here: there are three basic intersections
Simple cutting tool. (
The shape of the saw blade is different and more complicated.
They will discuss it in a later article. )
Below we see the basic single, double, hollow
Grinding, single-sided gouging and unmachined \"puff grinding\" blade shape.
Most common blades are one or the other in these shapes. (
See the illustration on the next page. )
The single bevel is the basic cutting edge in two forms.
The edge of the triangle can be called \"ground \".
\"We have only one or\" main \"land on a beveled knife.
We also have a \"level 2\" land on the double oblique surface.
In the shapes found on most knives, kitchen knives and axes, our knife tips are centered on the material of the knife body.
In tools such as rotating blades, chisels, flat blades, easels, etc. , adzes and the special broadaxeswe have a flat side of the side slope as the tool body, and the inclined side forms a long slope.
The profile of this blade is called \"chiseled edge\" or profile.
A single bevel may be the best and ideal form for a simple cutting edge.
The angle formed on both sides of the inclined plane is called \"including the angle \".
Including about 20 [angles]degrees]
For fine knives and kitchen knives, for 25 [degrees]
For the heavyouth door tool 30 [degrees]
Heavy-duty kitchen knives such as cutting knives and carpet knives.
A sharper angle such as 17 [degrees]
Only useful for razors.
One drawback of specifying sharp angles like this is that few people have enough control over their sharpness to produce a specific angle at the edge.
That\'s why I recommend fixtures to use for most things.
Then you can get the general range of joint angles.
Another drawback is that only very good knife steel can work well, thus worrying about the perfect angle.
Although you put 20 knives, most of them are soft. degrees]
They will disappear soon. Fine tools (chisel blades)
Since they will keep them in use, they should be sharpened to the specified angle.
There are good and cheap fixtures here.
See \"sources\" below \".
\"There is a thicker angle in the shape of the double bevel and a sharp angle is truncated.
Many people grind like this when they can\'t sharpen the vast land, and think they can beat the game by making a mistake in skill.
The trouble is that this creates a very blunt edge.
The edges formed in this way may help to chop something up, however, most of the material is dragged onto the shoulder of the slope, reducing the cutting efficiency of the knife.
The shape of the double bevel is usually caused by inferior steel or bad Steel
Knowledge of the grind.
Some steel will not have a single bevel and need to have a wrong angle.
These are not good knife steel.
Serious tools are more than a sneer.
Please note that the double bevel is only in the cutting area, not on the blade.
Some blades have a general triangle from the bottom to the tip.
This was interrupted by the actual angle of the sound.
These are single knives.
One of the most misunderstood knife shapes is the \"hollow\" shape illustrated above.
It is called \"hollow\" because the material is removed from the side with a grinder and a hollow pocket.
These hollow pockets do not have structural materials that support the edge of the blade.
The included corners of this blade are usually small from the heel to the tip --17[degrees]or so.
The only steel that can really support Hollow grinding is relatively brittle or hard steel.
This angle is good for a straight knife.
Hollow pockets create low resistance when passing edges through objects or objects that are already relatively smooth and lubricated.
Please note that when you use the round edge of the grinding wheel to grind the Swing blade of the mower, you will give it a very slight empty grinding.
This is not the same thing as a razor-
Hollow grinding.
The edge of the swinging blade, no matter what grinding you put on it, will be quickly returned to use.
The cross section of the razor is as thin as a piece of paper and extends out towards the tip.
Unfortunately, some manufacturers produce soft stainless steel kitchen knives that are more or less hollowgrind.
These are twisted, bent, and broken.
I have had some hard kitchen knives that are hollow.
When my assistant and I were slaughtering some goats and she was cut into bones, they made a dramatic sound. (
Yes, I know she shouldn\'t cut things with such tools.
However, this is the type of ofaccident that has been happening all the time because people don\'t know the limits of their tools. )
When I was shaving, I came back with a straight razor.
To grind a straight razor, you need a special fine stone, special oil, and a good slip.
The razor is honed on the stone, and the heel of the blade rests on the stone. (
The stone is a very fine sand and the oil is very thin, so it will enter the cavity of the stone and lubricate the grinding. )
Then touch the blade and draw the edges as fine and burrs-
Free as much as possible.
The edges must be straight, not jagged, and have burrs-
Or turn your face into chopped meat.
Real barbers often touch their razors between customers, just rarely award them Awards, or I was told.
If you want to keep the hollow angle-
With a knife blade or razor, you need to place the hollow ground heel and tip on the stone to keep the angle. Good luck.
Sharpening knife-at last! Okay.
Now, we can finally discuss the sharpening.
I would like to indicate three broad categories of knives and some other simple blades that are of interest to home blades.
Knives include kitchen knives, small pockets, folding knives, utility or heavy-duty fixed blade knives.
Kitchen knives: most kitchen knives are made of good steel or some semi-finished products
Soft stainless steel, mostly abused.
I used a soft stainless steel pencil sharpener.
These knives are too fast, they make up for most of the shortcomings of the steel in the knife, and the abuse they have suffered in unskilled hands.
The adjustment of the scraper includes angleon hollowing out
Kitchen knives.
In any case, the angle of these knives is usually too narrow.
Large, soft and flexible kitchen knives, such as the two-handle cutter used by the chef to cut cheese, are drawn in a single bevel shape.
Can record cutting knife;
However, I used them for speed reasons.
If I\'m grinding knives for a commercial kitchen or doing a series of slaughter, I\'ll file the cutter because the thicker edges are stronger.
I grinded my good iron knife.
I also don\'t encourage them to use daily kitchen cutting unless they are cutting knives.
Paringknife is often used and the chef should have a reliable advantage.
I bought a bunch of knives from the end of the catalogue (
Below is the source of seecatalog)
I grind them.
My wife, this keeps the chef on a fairly sharp edge.
I grind most knives with one of the two fixtures.
For small and medium cutters, I use Lansky-type fixture.
This fixture (
There are several manufacturers, look at the catalogue below)
There is a small wing vise that puts the knife on the heel of the blade, a set of stones mounted on a plastic holder with steel bars at the end.
The rods pass through the holes in the wings of the vise and the stones are pulled back and forth.
The fixture keeps the grinding angle unchanged.
Rough stones are good at shaping the edges, while finer stones polish the edges.
I turned to a wider angle (
Whatever is the next wider angle on the fixture)
Use the best stone and grind very narrow micro-slopes as finishes.
This is not a double slope, but a reinforcement action.
If I continue to grind, this will produce a new land that can be oxidized and will actually form a double bevel.
After a few times, when the flashing of the light reflects it, I stop the micro-slope.
Then I touched the edge.
I don\'t like trying to follow the rations of steak knives, although people can buy special stones that work in fixtures for this purpose.
The knives remain fairly sharp, as the cutting edges in the pocket do not hit the pottery by the jagged foreword edges.
I just grind these things back along the front as if they were straight blades.
This will tip the edge of the lead and open more pockets.
At the end of the day, I will grind the serrations to straight edges, but I have never done this because this kind of knife is rarely sharpened.
Bigger knives and kitchen knives are not suitable for the Blue Sky
Type offixtures is normal.
The wide blade reduces the angle of grinding.
For the big knife, I used a small fixture that fits the back of the blade, designed to maintain a specific angle.
Similarly, there are many manufacturers of these fixtures.
I grind these big knives on the Waterstone.
The Waterstone has a large size, which helps this sharpen.
To make a micro-Bevel, you can further reposition the fixture on the blade (
Towards the tip)
When you get to the best sand you have.
You then finish by carefully grinding the alternate sides until you can hardly see the flashing light on the New Earth.
I have done all my fine cutting tools, such as flat blades and wood chisels, with micro-slopes.
When grinding, I only move the knife with the front knife of the cutting edge to the cutting material, and vice versa, if the knife is fixed, the cutting material is a moving part.
If you cut the knife back, you will pull out a much larger burr.
This is complicated.
The burrs of the Waterstone seem to be smaller than that of the oilstone.
The fixtures I mentioned above all have diamonds, oil and water. Take your pick.
When grinding the tool, I noticed that most people reverse the blade on the stone every time they move back and forth.
This is a waste of energy as well as a good edge building.
Grind one side of the knife until the Burr formation is felt on the other side of the cutting edge.
To test this burrs, be very careful to pull out a nail from the other side of the nail you ground. (
You will most likely be cut if you enter the tip. )
When you feel a little bit of burrs forming, you have cut the land back far enough that you have a plane that is fixed on the cutting edge.
You then reverse the blade and grind on the other side until burrflips are over and you can feel it on the first ground.
I do this with the roughest grinding medium I have because a lot of stock has to be removed.
After flipping the burrs, reverse the blade and transfer to a finer stone to repeat the process.
After the initial grinding leveled the land, the ground stone that gradually became thinner will soon polish the land.
I save the best stone for building micro-beveled.
Then I touch them.
The purpose of sharpening knives, machetes, chisels, axes and similar blades is to eventually form two planes that intersect at an angle without burrs.
If you sharpen the tip with your bare hands, especially if you flip the blade over each stroke, you won\'t hold the blade at the same angle.
This is especially correct if you need to squeeze out a lot of stock from the blade, as your wrist will get tired.
In any case, it is necessary for few people to focus on freehand pencil sharpener.
What you end up with is two curved planes that intersect at an angle.
It\'s kind of like the reverse side of the hollow grind and can be called a \"puffed\" grind because it looks like you\'ll do it if you open your cheeks.
The puff Mill is like grinding many slopes.
The end result is that the edges are not as sharp as it is and not as sharp as it may be.
Those who think they are grinding knives with steel bars may at best just drill a metal burr along a blunt edge that doesn\'t make much difference to the intersection of the expansion curve.
These expanded curves will not give you control in precision applications such as wood carving, tearing, splitting, etc.
I know Americans.
The shaft of manufacture comes from the factory with edema on the edge.
This is because they \"finish sharpening\" on a high-speed Sander and the belt is bent and chiseled from the thinner edges.
I met some poor people who thought they should copy that inflated slope when they re-cut the axe. Too bad. (Go to a high-
End the hardware store and check the aJapanese-
Did ax and see if you found a curved slope on it. )
Pet annoyance: So far, the rivetsI\'s tablet handle doesn\'t mention another pet annoyance I have with the cheap kitchen knife: they have tablet handles --
Two pieces of wood with rivets, heldon.
The real knife has a waterproof beam at the end of the blade.
The real knife also has a handle.
Wood or other materials
Stick to the steel of the blade tang with epoxy resin.
Unless the glue cracks from one surface or another, nothing can cover them.
The flat handle allows oil and water to suck under the handle, or enter the handle material and re-
To pollute the food.
When you grind a knife with oil, be sure to wash off the blade with detergent --
Prevent this as much as possible.
The Realsharpening store uses \"meat shop oil\" to sharpen the meat cutting tool because it does not have the taste of the normal cutting oil.
I have never found a source for this oil.
The oil in the butcher\'s shop will also enter under the tablet handle and must be completely washed away.
I don\'t know why people are not poisoned more often.
If you have ever broken a wooden or plastic handle from the knife used in the kitchen, you will be surprised by the garbage under it.
Pocket knife: There are many kinds of pocket knife, dazzling.
From a safe point of view, the folding blade will fold back easily and will cut you.
Some people \"lock back\" with folding knives, and it can be imagined that these folding knives are safer. Guess again.
Atlanta tested a bunch of cutlery.
A few years ago, they found that only a few people would boycott 20 feet-
Before the mechanism fails and the blade folds back, there are several pounds of torquefor. Twentyfoot-
If you are a staff member and you are doing something seriously, the pound will not have any impact.
I think the indispensable thing about knives is their practicality.
I carry tools other than blades with me.
I prefer the \"Swiss Army\" type (
We used to call these scout knives.
Asa pocket toolbox.
I also have a small SAK knife on my key ring as it has a small pair of scissors I have been using.
Between the two, I use these knives at least 10 times a day.
SAK knife is one of the most popular pocket knives at present.
There are several manufacturers.
I have four or five knives.
Unfortunately, in addition to the SAK knives made by Puma, all manufacturers use relatively weak blade steel.
It always surprised me because the little scissors, like the little prys, openers, and awls, were very good.
Puma made a limited run with 440 SAK knives --
Stainless steel blade.
Everyone who uses me wants one.
Unfortunately they are no longer available.
I have a test to determine how good your blade is.
When the consumer tested the cutlery a few years ago, I got it from a more detailed and scientific consumer report.
Very simple and effective.
Grind the knife and cut off a pile of cardboard boxes.
The cardboard is rough on the knife because it contains the glue crystal of the worn blade.
Grind another knife and cut some boxes.
See which one is longer.
If there is an obvious difference, it may be a real difference.
I grind a knife with a fixture, just like I grind a better kitchen knife.
I follow the established angle on the knife, and although the blade is wider or narrower than usual, the fixture changes the angle slightly.
On all knives, I noticed that manufacturers usually center the edge of the blade during the mill sharpening.
The initial grind takes time because you need a symmetrical original world, or even an expensive name --
The brand tool is usually
More in the center or ground on one side.
This is high-
The production of Speed machines may be inevitable.
Third, large utility knives: If you do anything serious about your home, you will eventually find that you need a tool like this.
Hopefully this insight moment will come before you push your beautiful lock-back leather with a knife to a situation that folds over you and cuts off your fingers.
This type of tool is called \"military\" or \"utility \".
\"These knives are big enough to handle the light cut task, some prying, some banging and typical cutting work.
They won\'t replace the real two.
Axe or machete.
There are many kinds of tools.
Some of them made a lot of money.
After years of helping poor housewives, I observed that a cheap knife was very well supported in this class. This isthe U. S.
The Marine Corps issued Ka-Bar. (Ka-
Bar is the name of the knife maker.
I have no financial interest in this or any other manufacturer. )
My two colleagues, who have been home in the depths of the South for 15 years, have been carrying the same knife.
In a cold and dry climate, there is a vibrant Bush and vine growth level deep in the south, and you have to deal with it, otherwise it will deal with you.
It was torn off the fence, off the house, and off the wall. No kidding.
I grinded these friends\' knives in rare cases and saw their dress patterns.
They don\'t wear much.
Several of my other colleagues took these knives in USMCabsolutely and praised them.
I bought one recently. I like it very much.
There are also some great practical tools, but this one is relatively cheap. around $30-
$35 with jacket.
The flat end of Thepummel is designed as a hammer for light service.
This steel is not beautiful.
It is described as 1095, a fairly typical carbon steel without an exotic alloy.
The reason for its Rust
The resistance is that the blade is coated with epoxy resin. The 1090-
Andrews describes 1099 kinds of steel (p. 127)
With \"medium toughness, medium cutting edge.
\"The hot spot on the handle, just like this knife fits my hand.
This raises another point: the \"hot spot\" on the handle \".
This means that there are spots on the big knife and the machete handle that do not match the shape of your hand, which will cause blisters on your hand.
You won\'t find this in the event that you actually use the tool, as you are running through them with some elbow grease.
I found hot spots especially common with machetes.
The solution is to take a Sander (
Hand sandpaper or power supply)
Sand in these places.
It is easy to destroy the handle in this way, especially with a powerful sander. Be cautious.
It may be easier to trade the offending knife to others and get a more suitable knife.
I grind the big tool knife (not machetes)with aclamp-on-the-
Blade clamps and boulders.
I follow the same procedure explained above.
One exception is that I press these blades into and out of the cutting edge.
In other words, I grind them constantly in a drawing
Eight moves, only stop when I lift the burrs.
It is a great job to make these big babies sharp when they become dull or injured, because you have to remove a lot of steel.
It will take a while, and if you grind in one direction only, your grinding time will double.
The grinding tip is terminated in Micro
Bevel and slide bar. I sprayWD-
40 in this humid climate, the edge of the blade is also sprayed into the sheath to prevent rust.
Some manufacturers advertise that their big knives are able to cut the barbed wire.
They have small holes on their blades in order to install a special part on the sheath and then form a scissors.
These are formal applications.
I might use them like this, even knocking atwire off the post, but only in serious emergencies.
In the blade repair, you will pay a high price for it.
If you look at your guardrail tongs, you will notice that the cutting line is made up of two 90 degree angle scissors blades.
This is a special tool for cutting wires, not sharp to 20-30degree range.
A military knife may use the back of the blade, but it will still deform over time.
Almost all blades, especially the rear edges of the large blades, are softer than the cutting edges.
As mentioned earlier, they are made in this way, so the main body of the blade has a greater ability to absorb shocks.
The harder the front edge is, but the bending is not good.
There is a special scaper for outdoor sports-
The type of roll knife for this knife.
I won\'t use them on my big knives because of them
Th