Attachment to a woodworking machine. The simplest mechanized sharpening of planer knives Basic principles of knife sharpening

Owners of planers and electric planers periodically face the problem of sharpening cutting edges. A well-sharpened tool will ensure clean woodworking even at non-ideal angles and speeds. The easiest way to sharpen knives and knife heads with your own hands using specialized equipment.

Sharpening of knives is necessary

Planer knives require timely maintenance because:

dull surfaces do not process wood well;
when processing soft rocks with blunt knives, the surface is covered with pile and irregularities;
worn edges crumble;
during planing with blunt edges, the engine and power units are overloaded.

Attempts to sharpen blades with your own hands using diamond stones, as a rule, give a short-term result. Due to poor-quality editing, the blades have to be sharpened soon. Therefore, professional carpenters use only mechanical sharpening.

Types and designs of machines

The machines on the market are distinguished by the knife feed mechanism:

manually;
automatically.

The machine for sharpening planer knives with manual feed consists of:

grounds;
abrasive stone;
carriages for fixing the knife.

During processing, the cutter moves progressively with the help of a handle. The lateral movement of the cutter is provided by a flywheel.

Automatic machines differ in size and set of options. Mechanisms for industrial use are installed on a powerful cast-iron bed. The carriage is equipped with a support. You can set the speed of movement of the blade and the thickness of the removed metal layer. Industrial machines allow you to sharpen several planer blades at the same time without changing the settings.

	Corvette K-470	WTG-163	GA-630	GA-850	ZX-1000
Maximum length of knives, mm	630	630	640	850	1000
Abrasive disc diameter, mm	100	150	125	125
Sharpening angle, hail	35…55	up to 30	35…45	35…45	up to 30
Engine power, W	550	550	850	850	1500
Dimensions, cm	90 x 48 x 42	100 x 60 x 65	100 x 54 x 120	120 x 54 x 120	190 x 56 x 150
Weight, kg	75	60	112	125	250
Add. intelligence	Equipped with asynchronous motor wet sharpening possible	Processes cutters, circular saws	Wet sharpening possible	Can sharpen up to 4 blades, wet	Wet method available, cup type sanding disc, controlled via remote control

Table 1. Characteristics of some models of machines for sharpening planer knives

Compact automatic machines for home and small workshops are designed to process one torch at a time. They also provide speed control and automatic tool feed.

Before starting work on any sharpening equipment, you should make sure that the bed is firmly attached. The vibration of the machine worsens the quality of sharpening and can lead to injury to the master.

Basic rules for using manual feed equipment

Such machines are used for one-time work and do-it-yourself sharpening of small batches of blades, since the processing process is quite long.

Before starting work, make sure that the grinding surface is clean, free of stains and streaks.
The movement of the carriage should be smooth, without jerks and jerks. It is forbidden to stop it at the moment the cutter approaches the grindstone.
The faster the carriage moves, the lower the quality of sharpening. The optimal speed of movement is 5 - 6 m / minute.
For proper sharpening, the amplitude of the movement of the carriage is important. For the passage in each direction, it should move 10 - 13 cm beyond the end of the knife. This ensures optimum contact between cutter and sharpener, which must be interrupted before moving in the opposite direction.

Basic rules for working on automatic machines

Planer knives can be sharpened dry or wet. In the second case, the blade is constantly washed by a jet of water. The wet method is more gentle on the blade and more efficient;
Before starting processing, it is necessary to set the parameters: sharpening angle, carriage movement amplitude. The amplitude should be 15 cm more than the length of the knife;
Do-it-yourself blades are carefully fixed in a mobile carriage.

Homemade machine for sharpening planer knives

The design, made at home with your own hands, allows you to quickly and accurately sharpen knives at one set angle. The factory angle will change, so all blades will need to be resharpened. The quality of planing will not deteriorate, but may improve.

To make a device for sharpening straight blades of planers, planers and thicknessers with your own hands, you need:

metal corner No. 50;
round pipe with a diameter of not more than 50 mm;
an electric motor from a washing machine;
powerful spring;
bolt with nut;
plastic handle (knob);
Bulgarian;
welding machine.

Making a machine with your own hands.

Cut off a corner about 50 cm long.
We bend two pieces of the pipe in such a way that we get a stable stand for the corner, weld the legs. The corner should be located vertically to the master.
At the left end, around the corner, we attach the electric motor. It is placed on two points: a rigid axis and a powerful spring; The spring is tightened and released with the adjusting screw, moving the motor closer or further away from the guide-corner.
We put an abrasive wheel on the motor shaft.
The engine is started by a switch placed on the frame in a convenient place.
We feed the tool with the help of home-made vices from a piece of pipe 25 cm long, a pressure plate, a bolt with a nut and a knob. We clamp the knife in a vice and move it along the guide, holding the knob.

Special machines are used for sharpening planer and planer knives. The work can be done with your own hands, the machine, if necessary, is assembled independently. Sharpening is carried out according to certain rules, several options are used. It is required to show attention, not to break the technology.

Otherwise, knives for planers, planers and planers will be processed poorly, they will not be able to perform their functions to the fullest. In addition to special equipment, grinding stones can be used for sharpening, but a small grinder that has cooling is best suited for work.

Preparatory work

Everyone who has a planer or jointer faces the problem of sharpening knives. Constantly buying new ones is expensive, especially since knives can be easily sharpened with your own hands, using special machines or whetstones for this. If the planer is used frequently, like other woodworking equipment, then it will be inconvenient to constantly give knives to the workshop for sharpening. It is better to assemble the machine yourself. To ensure that the jointer is always in working condition, it is recommended that sharpening be done at home. The easiest way to do this is with a regular grinder. You need to take only a sharpener with low speed, its quality should be high. Water cooling must be available.

A grinding stone can also be used, but it must first be leveled with a special device. Usually it comes with a small grinder, so you don’t need to look for such devices additionally. After the editing is completed, it is necessary to smooth the stone, for this a bar is used. Sharpening a planer knife without this step will be problematic.

What to do next? You need to set the angle. A special screw will allow you to properly strengthen the blade relative to the position of the grinding stone. With the help of this screw in the future, you can set any angle of inclination of the knife. Next is the holder that comes with the machine. A cutting knife is installed in it. Experts advise starting sharpening knives with a width of at least 13 mm.. The length is not critical, if necessary, the knife holder can be rearranged to any position.

In the holder, the knife must be securely fastened, otherwise the sharpening will be skewed, and this will worsen the quality of the jointer. How to fix the knife in the holder? While holding the blade in the desired position, tighten the clamping screws until they stop. To control the angle of sharpening, it is necessary to use a marker, it marks the sharpened chamfer of the knife. It is with the help of such a simple method that you can easily control the quality and progress of work. Sharpening will be correct if the corner of the knife touches the stone. The stone must be rotated by hand to determine if further adjustment is needed.

Back to index

Sharpening process and working rules

The holder moves to the right and to the left, the movements are made relative to the grinding stone. The blade must not be allowed to go over the edge. It is best to immediately install the holder 12 mm from the edge of the working circle. If sharpening is carried out, water cooling must be supplied. Water will have to be added to the tank, you need to make sure that it does not end. It is necessary to provide that water does not accumulate on the floor near the feet. This is done for security purposes.

When performing work, it is necessary to ensure that the stone always remains clean, as it is salted quickly enough. A special bar is used for cleaning, it is recommended to carry out such a procedure often, since only clean stones can be used for sharpening. The choice of the stone itself depends on which knives are used. Today, manufacturers produce planer knives made of soft or hard tool steel, so working conditions will vary.

It takes about 20 minutes to sharpen, then finishing is performed. For this, a special paste is used. After polishing, no burrs should remain on the surface, otherwise the planer knife will not be ready for work. It is easy to check, a finished knife with excellent sharpening should easily and evenly cut a sheet of paper on weight, leaving a neat cut.

Back to index

How to make a machine with your own hands?

To sharpen a planer knife, it is necessary to use special sharpening machines. This is especially important when planing, planing and other woodworking equipment is used frequently. The grinder has a compact size, it can be installed even in a garage or a small shed in a summer cottage. Before starting the assembly, it is necessary to prepare the appropriate tools that will be used during the assembly of the grinder:

the table on which the work will be carried out;
faceplate;
vacuum cleaner;
engine;
casing for the machine.

It is necessary to start assembling the machine by finding a suitable faceplate. It is one of the most important parts for a grinding machine. All planer knives are quite narrow, so they can only be sharpened with the right type of faceplate. Then the work on sharpening will be of high quality, safe, fast. The faceplate occupies the bulk of the cost of all equipment. To make a grinder yourself is more profitable, expensive parts are not required for it. Manufacturing will be fully justified if you have to often carry out woodworking.

Faceplates need to be bought new, it is recommended to take elements of American or German production. They have the highest quality, and the cost fluctuates at the level of 25,000 rubles. Next, you need to choose an engine for the future grinding machine, it is best to take a 1-1.5 kW motor, you can even use a used item. Motors from old washing machines are great for the machine, but first you need to make sure that the engine is working.

The motor is mounted under the tabletop, the faceplate is mounted to the moving part.

It is imperative to provide for a button to turn the machine on / off. It should be located within reach of the hand. The faceplate is covered from above with a casing, which is made in the form of a square. One corner of the casing must be cut off, since this side will be used to sharpen the planer knives with your own hands. A hole is made in the lower part of the countertop, it will be intended for the vacuum cleaner pipe, with which all contaminants that occur during sharpening will be removed. In addition to sharpening planer knives, a similar machine can be used for other work, for example, for processing ax blades, saws and other tools used in a summer cottage.

Planer knives can be sharpened using a variety of methods. For this, special grinding stones are suitable. However, a compact grinder can be assembled by yourself. It will be used to sharpen a variety of tools, including saws and axes.

This is for those who have trouble sharpening knives for wood planers.
The quality of wood processing (and not only wood) depends on the "sharpness" of the knives and not only the quality of processing, but also the safety of work on such machines. In my "arsenal" there are seven such machines. Every time "search" where to sharpen tired. And you won't find much. The sharpening process itself does not tolerate "speed", the knife can simply be "burned". It takes a lot of time to do this and it is advisable to do it at home. The machine must be automatic or at least semi-automatic. In order to remove the maximum tedious work from the machine operator.

As always in my practice, I apply, first of all, to make from "what is." To minimize costs, while the quality of work, the future manufactured product, should not suffer.

As a result, we got such a "unit". I am satisfied with the work of the machine, the problem of sharpening knives has been removed.

The power engine borrowed from an unnecessary pumping station, about this modification.

Its parameters are quite acceptable for this machine.

The frame of the machine was welded from a profile pipe (20x40) and screwed with screws to a wooden base, thereby increasing the rigidity of the structure. Which is very important. I welded a guide profile of the same size in the center. It serves to guide the movement of the carriage of the grinding unit.
The basis of the sharpening unit is made of powerful metal from railway linings for rails. Found on the farm.

To him, after appropriate processing, he installed a guide plate, on which he fixed the electric motor at three points. One of them is adjustable. The guide plate, relative to the base plate, is movably fixed on two piston pins from the Muscovite, the rollers (guide shafts) exactly fit from the UAZ gearbox. To feed the grinding stone to the part (knife), there is a screw with a fine thread.

The whole unit moves along the guides on closed ball bearings, 4 support and 4 guides. This must be done very accurately, since backlash is not acceptable here.
The emery (stone) itself is plate-shaped, which allows sharpening according to the rules for sharpening such knives.
The knife is fixed in a special device that can change the angle of sharpening. For a planer sheath, it should be 45-60 degrees. To attach the knife to the device, I used canopies from a furniture set.

Below are two adjusting screws for adjusting the knife, when sharpening, along the gap between the knife plate and the grinding stone.
Fasteners turned out reliable and not expensive.
After the adjustments, turn on the emery and begin to move the unit along the guides, from one end to the other bed. At the same time, gradually tighten the feed screw. But do not overdo it, otherwise you can burn the knife.

Naturally, this process takes a lot of time and this part of the manual work had to be automated. Found in stocks (already three) electric motor with the desired number of revolutions. He came up with a "power supply" from the 220th century. (there he has 127 v.) and most importantly, reverse switching of the engine. Installed limit switches and relay,

Shaft, to move the carriage, I had to write out a set from the Chinese, which suited me perfectly. The set consists of a shaft (60 cm), bearings, a self-centering coupling, a guide sleeve.

The sharpness of a knife is one of the main parameters affecting the quality of wood processing. In addition, this characteristic also affects the degree of security.

Often a person does not want to run over and over again in search of a place where he could bring his cutting tools into proper condition. In this case, it is time for him to think about making a home-made grinding machine that would solve the issue of the sharpness of planer knives once and for all.

The development of industrial equipment does not stand still. There is a constant rapid growth in the requirements for speed and, most importantly, for the quality of material processing. In this regard, there is a need to create a cutting tool with high parameters.

One of the main problems that appear in the process of work is the sharpening of knives. This is what determines the main capabilities of the machines and their suitability for operation.

Homemade grinder.

Depending on the tasks to be solved, such devices are divided into two types: universal and special. The first are sharpening devices for the surfaces of most cutting elements. They are equipped with a variety of devices that allow you to fix, install and sharpen knives.

All units are equipped with various equipment, which determines the degree of automation and control of the accuracy of the work performed. are also different. These can be stationary devices or temporary ones that can be placed on any horizontal surfaces.

Despite the wide range of types of equipment offered, in order to save money, a knife sharpening machine can be made by hand.

Homemade units can in some cases even be more convenient than purchased options. This is due to the fact that the master independently decides what characteristics this device should have.

Although, of course, many models of universal devices allow you to choose the most suitable type of equipment that can solve the tasks.

Homemade knife sharpening machine

Most often due to two reasons. The first is the desire to save money. The second is to show your skills and do everything with your own hands exactly as your soul desires.

Drawing of the device of the machine.

For example, very often you may be faced with the need to put in order only certain tools. These can be drills, milling cutters, saws or planer knives.

In each case, a separate approach is required. Self-assembly of the machine will allow you to make a convenient unit for working with certain elements.

Among other things, the presence of sharpening units will significantly save costs for the purchase of new knives or for their restoration in third-party workshops.

If you need to professionally sharpen the tools listed above, then you should still give preference to purchased devices. They are more thoughtful and elaborate.

In addition, buying in a store guarantees that the device will solve the tasks for a long time. You should also remember about the degree of automation. Of course, professional devices use electronics that are simply impossible to make at home without proper experience.

Option 1

For sharpening a planer, you will not only keep the tool in good condition, but also save time on trips to other workshops.

One of the options for creating such a device is to use an engine with an abrasive wheel, emery or a sharpening device with a knife fixed in it.

Homemade machine for sharpening planer knives.

This device can be made partly from aluminum, metal and wood. In this case, bearings and guides are used, made from improvised materials, for example, pipe corners, etc.

If the knives are level, they can be sharpened on a large abrasive block. If this is not available, sandpaper glued to a flat surface should be used.

Depending on the requirements for the final result, you can vary the speed of this process. In the presence of chipping, it is necessary to first use a belt grinder, and at the final stage process the tool with an abrasive bar or homemade sandpaper.

According to the design features, the machines can also differ from each other. The first option is a device with a fixed base. The angle of its inclination can be changed, but otherwise it is in a fixed position.

The bar is attached to a rod, which is inserted into the loop of a movable latch located on another rod. The disadvantage of this design is the "walking" angle due to the lack of rigid fixation.

The knife is installed by means of two steel plates fixed on a fixed platform. After loosening the fasteners, insert the blade and clamp it. Then adjust the height of the bar so that the required angle is set.

Option 2

The second type of design provides for a movable platform, as well as a magnetic holder. This option is devoid of the shortcomings of the previous unit. Fixed in this device is a frame with a bar that determines the angle.

The knife, in turn, is mounted on a movable table. The choice of holder is up to the master. You can use the magnetic type or the usual one, made of metal platinum and "lambs".

An important requirement for such equipment is the movement of the table with the cutting tool on a strictly horizontal surface. As it is best to use a polymer or marble countertop.

The principle of sharpening knives on the machine.

As you can see, sharpening knives is not so difficult. If you have any problems, you can always use the help of training videos from the Internet. With proper observance of all instructions, anyone can make such equipment.

Outcome

A knife sharpener is an essential piece of equipment in the workshop of every woodworker. A timely solution to the problem of sharpening knives will not only speed up the processing of the material, but also save time and money.

Why go to other workshops if you can make the necessary equipment with your own hands?

Do-it-yourself knife sharpening is a painstaking procedure due to the hardness of the products being cut, the frequency of use of the tool, and the thickness of the cutting edge.

The need for surgery arises regardless of the quality of the blade. How to do it at home? Let's try to figure it out.

In contact with

Why do you need to sharpen knives, can you do it yourself

Any hostess knows that knife sharpening is very important: working with a blunt tool is not only difficult, but also dangerous. The process slows down significantly and requires serious effort, as a result of which the muscles of the hand get tired quickly. In addition, the blade is capable of jumping off and causing injury at the most crucial moment.

You can carry the product to the workshop, where you will quickly sharpen it. But where is the guarantee that the work will be done correctly and the blade will not be spoiled? In addition, this service is far from free and requires a significant amount of time. And, sometimes, it is very lacking in preparation for the celebration, for example, in order to cook dinner on time. If the knife sharpening machine is at home, you don’t have to go anywhere. The quality will depend only on your skill, the tools and devices used.

Why knives lose their sharpness

No matter how high-quality the steel of the blade is, sooner or later any knife becomes dull. Why is this happening?

In the process of interaction with the material being cut, the cutting edge loses microscopic fragments of steel. At the same time, its shape changes, and the blade loses its sharpness.

In addition, this process causes deformation of the blade. When cutting products, we apply a force that almost always deviates in one direction or another. Of course, if this were the only reason, then it would not be necessary to sharpen knives so often. Another detail is important, the influence of which on sharpness is much more significant.

Maintaining the direction in accordance with the plane of the blade is almost impossible. As a result, the thin edge is slightly bent, and it becomes much more difficult for the knife to overcome the resistance of the material being cut. This process occurs especially quickly if the blade is made of low-quality steel.

There is a point of view that hot water can dull the blade. To some extent, this is true. In the process of contact with steel, salts dissolved in water react with the metal, causing a change in its properties that is far from for the better. But such an impact is not decisive and has no serious significance.

Prices for knives

Basic principles of knife sharpening

There are several ways to sharpen. The choice depends on the time you have, the purpose of the knife, the tools and fixtures available.

The general principles are:

initial processing is carried out with a coarse-grained abrasive;
subsequent grinding is performed with fine-grained material;
leather or various pastes of varying degrees of abrasiveness are used for final finishing.

To facilitate the work, a purchased or home-made knife sharpening device can be used.

At what angle should knives be sharpened?

The sharpening angle mainly depends on their purpose and, accordingly, the quality of the material from which they are made. What value of the sharpening angle should be for knives designed for various needs is indicated in the table:

In some cases, the angle can be reduced to 15º if the tool is used for a special purpose, such as slicing fresh baked goods.

Applicable materials

Do-it-yourself manual knife sharpeners can be made using bars of varying degrees of abrasiveness. The latter are conditionally divided into the following groups:

the roughest, which is not applicable in this case (from 200 to 250);
coarse - to form the profile of the cutting blade of the blade. If there are no visible defects, such stones are not used (from 300 to 350);
medium - as above, they are used infrequently, mainly for rough adjustment of the blade profile (from 400 to 500);
small - the main type of stones used for sharpening knives (from 600 to 700);
very small - used to bring an already sharpened blade to a mirror look.

These stones are made from various materials. A do-it-yourself manual sharpener can be made from natural and artificial bars. Natural - from natural stone (corundum, slate, etc.). Artificial - made of synthetic materials or diamond. Moreover, natural ones wear out more strongly and do not differ in large grain size.

Prices for abrasive stones

abrasive bars

Before use, it is preferable to moisten the bars with water or soapy water.

Note: a bar should be used, having a length significantly exceeding the blade being sharpened.

In addition to abrasive bars, can be used:

homemade devices that serve as their holder;
sharpening machines for knives;
mechanical sharpeners;
musats - devices for finishing a sharpened blade and representing several metal disks nested one inside the other.

This list may be expanded. We have given only the main tools used.

Manual sharpening rules

In order to sharpen the cutting edge correctly, you must follow the specified sequence of actions:

at the initial stage, we perform work with a bar of medium or coarse grain, depending on the state of the blade; it would be more correct to fix the bar from displacement;
determine the required sharpening angle; on each side of the blade, its value is half of the total; the main thing is to keep this angle unchanged;
movements should not be jerky; no significant effort should be made;
the initial move is carried out away from you, the edge must go along the entire length of the bar. Please note: when in contact with the bar, the blade must be directed at a right angle relative to the direction of movement;
in the place of rounding of the blade, it should be turned to maintain the desired angle;
at the end of the movement, the blade should not come off the bar, because this may cause it to become dull or damage the side surface;
then we move in the opposite direction;
we continue the sequence of these operations until a bent thin strip appears on the blade; checking for its presence, you can not run your finger along the blade, because you can easily get hurt on sharp edges; if the knife is sharpened correctly, this edge should be the same width on the entire blade;
turn the tool over and repeat the operations until a similar result;
we take a smaller donkey and sharpen further, but we no longer move on ourselves - only in the forward direction; since the grain of the bar is smaller, the amount of burr along the edge is also reduced;
we process the reverse side in the same way;
we repeat these operations on both sides on an even smaller stone; if the burr still remains, we remove it with the finest-grained bar; we remind you that the movements are still carried out in one direction - away from you; the pressing force is reduced towards the end of the operation.

Sharpening finished. It is also possible to finish the blade on a leather strip. An old belt will do just fine.

How to make a homemade device

It is quite possible to make a machine for sharpening knives at home. Let's consider some of them.

Option number 1: the blade is fixed on a fixed platform

This device helps to sharpen the blade, providing the required edge angle. Below is a do-it-yourself knife sharpener. Drawings and drawings.

A homemade knife sharpener can be made in the same way as shown in the figure.

The principle of operation and design are clear. The manufacturing sequence is as follows:

the base can be chipboard or steel plate; it is marked and drilled under the stand and blade holder;
on the side of the base opposite to the rack mounting, a hole is drilled for the M8 bolt for attaching the knife clamp;
two M10 studs are made: one for the stand, the second for the holder for the abrasive bar;
a bracket is made for mounting the holder's stud on the rack (by drilling and bending a steel or aluminum plate;
brackets of the whetstone holder itself are made from two corners;
a clamp for the blade is made;
the structure is assembled in the form shown in the figure.

This device has one drawback: it is not able to provide a right angle between the movement being performed and the blade edge in the place of its rounding.

Option number 2: with a movable platform and a magnetic holder

This problem is solved by the following construction. It is performed in the same way, but a magnetic holder is used to attach the knife. Thus, it is possible to move the magnetic holder with the blade installed in it and turn it to the required angle. This knife sharpener is available with a base plate or can be attached to a table as shown in the photo.

It will greatly facilitate the process of sharpening knives.

How do-it-yourself planer knives are sharpened

Any man who has such equipment in the house has dealt with the sharpening of his knives. To do this, special tools and abrasives are used. Certainly, if the machine is often used, it is advisable to have the necessary device at home. Consider how to do it yourself.

How to make a machine for sharpening a planer knife yourself (step by step instructions)

To make a do-it-yourself grinder for straightening this knife, you will need to select the necessary parts:

plan-washer;
bed;
electric motor;
vacuum cleaner;
fencing.

Production is carried out as follows:

The electric motor is mounted directly under the bed; be sure to take care of the equipment with its control buttons "stop", "start";
A plan washer is installed on the output shaft, which is closed with a square fence with a cut groove;
On the lower plane of the table, a hole is made according to the size of the vacuum cleaner sleeve, the latter is designed to remove the dust generated during sharpening.

What you need to know

The electric motor may not necessarily be fixed under the base of the plan-washer. It is possible to use a belt drive, but this will complicate the design.

With this machine, you can also sharpen axes and saws.

Ice screw sharpening

The sharpness of the ice drill allows the fisherman to not make any effort to drill holes in the ice during winter fishing. But for this it is necessary to sharpen the knives of this device.

Sharpening methods are quite diverse. One of them is the use of a self-made tool.

How to make an ice drill machine with your own hands

Two steel strips 4 mm thick and 60x200 mm in size are required. Automotive spring steel can be used, but it is difficult to bend. Therefore, it is advisable to choose a different material.

Progress

First, the fixture frame is made. The strips are bent so that the knife chamfers, which are pressed against the edges of the rounding, are at the same level and are parallel to each other.

Then a clamp for sharpened products is made from another strip.

Holes are made in the plate and body. The clamping plate is bolted to the body, with the knives clamped. It is checked how tightly they fit to the surface of the end part of the abrasive wheel.

If the angle of the knives is incorrect, the device should be modified by bending the arc of the body. After making sure of the correct placement, we disassemble the fixture and weld the stiffeners to the body arc.

It is better to place the emery wheel horizontally, this ensures water retention on its surface. Cooling the knives with water will avoid overheating of the steel during sharpening.

Minus the device

The disadvantage of this machine is the impossibility of its use if the chamfers on the knives are located at different angles. Since different manufacturers of ice screws have different designs, a universal attachment can be of great help.

Implementation of a universal device for sharpening an ice drill

It allows you to overcome the above obstacle. Adjustment of knives is carried out by screws, besides, the possibility of reliable fixation in different positions relative to the abrasive wheel is provided.

This fixture will require a door hinge with a minimum stroke and an M8 screw with a nut. Holes up to 7 mm in diameter are drilled on the shelves of the canopy to secure the knives.

A clamping plate with a groove for the clamping screw is made from a 3 mm thick metal strip. They are boiled to the slats of the canopy.

Additionally, you can drill a few more holes, for greater versatility of the device, so that you can sharpen non-standard knives.

How to sharpen planer knives

This equipment is also widely used at home. It allows you to bring the raw lumber to the required condition. Naturally, sharpening knives for woodworking machines is periodically required.

To make the necessary devices, you will need different materials: steel, wood, and so on.

The latch itself is made of wood. Grooves are made on it at 45º. Editing of knives is carried out by a belt grinder or an abrasive bar.

It is important to maintain the exact angle - this ensures the correct processing.

Sharpening with an electric sharpener

Equipment equipped with an electric drive greatly facilitates the work and reduces the duration of the process. But such devices require precision movements and experience.

Do-it-yourself electric knife sharpener is performed with an installed handpiece to support the product being sharpened, with the ability to adjust the gap between it and the abrasive wheel.

Note: must be equipped with a protective shield to protect the eyes from dust.

Processing is performed by the front surface of the circle. You can not use its side faces. The knife is installed on the handpiece with the cutting edge up and held along the axis of the product. The movement is carried out evenly, smoothly, without strong pressure.

After sharpening on both sides, the final refinement of the cutting edge should be carried out with fine-grained stones until the bend of the edge of the blade disappears completely.

Of course, a do-it-yourself knife sharpener can be made, but specialized sharpeners are offered for sale, which are absolutely safe and allow you to freely sharpen knives for any purpose.

To do this, after turning on the device, the knife is inserted into the desired slot and evenly drawn along it until the edge is completely sharpened.

These devices provide excellent sharpening quality. Their disadvantage is the inability to adjust the angle of the cutting edge.

Useful video: knife sharpener ideas

Whatever equipment and tools you use, the main thing is to observe safety when performing this operation. Remember that it is much easier to cut yourself with a dull knife than a sharp one. Therefore, let the knives in your house always be sharpened.