A device for sharpening drills at home. We sharpen a drill at home - sharpening angle and other nuances Making a device for sharpening drills with your own hands

Work good tool it's convenient, effective and correct! Today we have useful homemade product for home and garage - homemade machine for sharpening drills. Correctly sharpening a drill presents some difficulties without experience. And the drills large diameters(somewhere from 6mm) can still be controlled by sharpening and, at the very least, they can be sharpened after some time. Drills of small diameters, especially in demand by masters of radio and electronic equipment, have to be sharpened literally by touch and under a magnifying glass and without the use of mechanization using corundum blocks. By the way, just recently we published the article “If you haven’t read it, be sure to read it!

Using my deposits of illiquid assets and conducting a review of the Internet, I collected a quick fix A simple device that allows you to sharpen drills from 2.0 to 6.0 mm without much difficulty. Further improvement of the device is possible and is a task for the near future. General form in photos 1 and 2.

As, of course, it is known that metal drills have a sharpening angle at the tip of 120 degrees. (Less for wood and soft metal). The photo shows a yellow square lying between the sharpener and the device, ensuring this angle, i.e. the drill is located at an angle of 60 degrees. to the working end of the abrasive disc. The required angle of the drill head is ensured by the initial inclination of the drill relative to the disk.

The operating principle of the device is not new and has been repeated many times and published online. The difference between this device is the use of so-called jewelry vises, which are commercially available and inexpensive, to secure the drill. I had some very old ones, altered and worn out after 30 years of use. Photo taken from the network.

The principle of operation is simple - by turning the handle we move the jaws apart and by turning them in reverse we clamp something, for example a drill.

These vises have been modified. The rivets were also drilled onto these seats the plates were installed and re-riveted with longer rivets. It will become clear later why this was done.

The drill is clamped in a vise so that the cutting edges lie parallel to the jaws.

Along the edges of the riveted plates, coaxial holes are drilled at the same distance from the center and lying on a straight line perpendicular to the axis vise (that is, and a drill). An axis will pass through these holes on which this “rocking chair” will swing alternately when sharpening one and the other edge. With ideal marking of the rocker, equality of the cutting edges will be achieved during sharpening.

The rocking chair is mounted on racks (mortise housings fit door latches without entrails. In turn, the racks are screwed to an oak block. It also contains four support legs for adjusting the desired height.

The rocker with the drill is placed between the posts on an axle; the axle is removable.

Sharpening the first edge (jaws are painted over with a blue marker).

The sharpening of the second rocking edge is turned 180 degrees. (the painted side is not visible). Top view of this node.

The finished drill is pictured below. Errors that arose when working “on the knee” and old worn-out vices did not allow sharpening drills from 1 mm. Shown here is a sharpened 1.5mm drill bit. At high magnification, the difference in the lengths of the cutting edges is visible (small, but there)

Having picked up correct drawing devices for sharpening drills, you can make homemade full-fledged equipment at home. Thanks to this device, the task of providing the required geometric shape tool.

When using it, there is no need to worry not only about the rotation of potentially dangerous sharpening stones, but also about the sharpening angles, which must be maintained correctly, catching every degree by hand.

Features of using homemade sharpening devices

During the process of drilling holes in metal products, drills wear out quite a lot, which leads to their heating and loss of their properties. To avoid this phenomenon, measures are required to ensure regular restoration of their geometric parameters. This can be done using special equipment for sharpening drilling tools. The creation of such a simple device can be done independently, which will allow for high-quality sharpening without any significant financial costs.

Many experienced professionals practically do not use sharpening devices, since they are absolutely confident in their experience and eye, which allows them to sharpen drills correctly. But in practice, the use of such devices is extremely necessary, as this allows mechanization this process. As a result of such work, maximum accuracy and quality of sharpening will be ensured.

The modern market offers different kinds equipment that allows high-quality restoration of geometry cutting tools, even if you have no experience in this matter. At the same time, there is no urgent need to purchase such products, since they can be made with your own hands according to the existing drawings of devices for sharpening drills.

Drawings of simple devices

The simplest devices for sharpening can be bushings, inner diameter which corresponds to the transverse dimensions of the drills. The sleeve is rigidly fixed into a reliable base, taking into account a certain angle. When selecting a bushing for such devices, you should pay attention to the correspondence of its internal diameter with the transverse size of the tools being sharpened. It is prohibited for the tools being processed to dangle in the sleeve, since even with a deviation of 1-2 degrees along the axis from the required values, the quality and accuracy of sharpening can significantly decrease.

Such homemade devices To sharpen drills, they must be equipped with clips. Copper or aluminum tubes, the internal diameter of which is equal to standard size drilling tool used.

In some cases, the task can be simplified by installing on this design wooden block, in which holes must be drilled with a diameter corresponding to the tool used. One of essential elements Such a product is considered to have a tool rest, which is necessary for:

ensuring correct fixation of the drilling tool and the possibility of precise movement in relation to the surface of the abrasive stone;
creating a stop point for the drill being sharpened.

Such products made from oak bars, which have holes of different sizes, are the most reliable. Thanks to them, high-quality and precise sharpening of tools is performed. The main task that must be solved by a homemade machine or similar device is the correct orientation of the cutting part of the tools being processed to obtain the accuracy of the required sharpening angle.

To make a homemade machine for sharpening drills, a number of different design variations of such equipment can be used. If you have the appropriate drawings and understand the operating principle of this equipment, you can make sharpening equipment yourself at home.

The structure consists of the following elements:

Promopore site

Holder for drill and stop screw

Bolts, nuts, pins, screws

Exist important rules that must be observed during the operation of such a device, namely, the tool being sharpened should not rotate around its axis. In case of even a slight rotation, sharpening must be done again.

The sharpened tool must be cooled in a natural way. After which you should check its restored geometric parameters. You can use a template for this. It should be taken into account that each cutting edge of the drill may differ from each other by no more than a tenth of a mm. Wherein, Special attention It is worth paying attention to this parameter if the drills have a small diameter.

Video “Device for sharpening drills according to drawing”

Drawing of a full-fledged device

A fairly simple way to make homemade sharpening equipment, which is practically no different from the factory product. To assemble it according to ready-made drawings it takes about 1.5-2 hours.

To make a device for sharpening drills with your own hands, you must provide the following: Supplies, equipment and tools:

welding machine;
electric drill;
Bulgarians;
standard locksmith tool kit;
a corner, the size of the shelves is 30x30, and its length is 100-150 mm;
metal plates having different thickness(3-5 mm);
pins or a piece of steel rods, the diameter of which is 10-12 mm;
washers, screws, bolts and nuts of various sizes.

First of all, the manufacturing of the bed is carried out, which will be the base in the sharpening device. To do this, use a steel plate onto which a steel rod (12 mm in diameter) is welded at an angle of 75 degrees. It will be the axis.

After that, a washer should be placed on the welded rod, which will act as a support bearing. The amount of angle and rotation of the bed when sharpening the drill will be insignificant, so there is no reason to use a standard ball bearing.

The bed where the sharpened tool will be placed is made from a prepared corner. One side on the corner profile that faces the side whetstone, it is necessary to grind at an angle of 60 degrees. On the stock, according to the drawing, a bracket is welded, through which the rotating unit of the device will be fixed. As a result, a structure will be made, the corners of which, in the case of a parallel position of the bed and frame, should be located to the surface of the abrasive stone in accordance with the angle of the drill being sharpened.

The sharpening machine, which is shown in the drawing, has fixed tilt angles, but for greater possibilities it is desirable to provide the ability to adjust the angles. In such cases, there will be a greater chance of using the device if it is necessary to restore tools with different sharpening angles, for example, if it is necessary to sharpen drills for metal, concrete, etc.

To create a more functional unit, you can use drawings of other designs that can adjust the angles:

Video “Device made according to drawing”

Drill sharpening can be done manually, on machines or with special abrasive discs.

If you sharpen the drill by hand, then you need to:

hold the shank firmly and guide its spiral part with the other hand;
press the cutting edge of the drill against the side surface of the abrasive wheel;
after sharpening one side, it is necessary to smoothly rotate the drill, while the cutting edges must have the correct inclination to the axis and take the desired configuration.

The drill is sharpened on both sides alternately. At the same time, be sure to control the cutting edges.

Remember! The tip of the drill should be exactly in the center.

Otherwise, it will deviate during operation. It is worth noting that under no circumstances should you put too much pressure on the drill, otherwise it may get defects (bending).

For example, if after sharpening you notice that the cutting edges are not the same and are inclined at different angles to the axis, then this means that the middle of the transverse edge is not in the center of the drill, and it will not work correctly.

When sharpening, be sure to pay attention to the initial angle of the tool. It is he who will become your guide in the future. Then inspect the gimlet for damage:

if you find serious defects, you can use coarse sandpaper;
if the defects are small and the drill is only slightly dull, use a finishing wheel. This operation is necessary for thin drills;
if the concrete drill has defects in the shank taper, treat top part tool, gently pressing it against the grinding wheel;
After processing, carefully inspect the back surface of the drill again;
If you notice, or determine with a template, that you have a perfect cone, you have sharpened the tool correctly.

After this, process the cutting edge of the drill. The size of the jumper for rational turning of the tool should be 1-1.7 mm.

What are the features of sharpening machines?

A homemade device for sharpening drills is designed for through and blind drills made of steel, cast iron and various hard alloys. Depending on the type, machines can be equipped with different functions. On some of them, you can vary the angle during operation.

There are sharpening machines:

universal – used for various cutting tools;
specialized - for one type.

Exactly to universal machines include devices for sharpening drills, because they can be used to process:

taps;
cutters;
dugouts;
countersinks.

Machines are divided into two categories:

Industrial - have high power and are designed for sharpening tools large diameter. Power depends directly on the engine.
Domestic grinder for drills - quite compact and is often used for home use. It can be used to process even small-diameter drills.

There are seven sharpening methods:

Single-plane.
Complex screw.
Shaped.
Elliptical.
Conical.
Two-plane.
Screw.

How to make a device for sharpening drills

To make a homemade machine you will need:

toggle switch;
abrasive wheel;
stub;
engine;
stand;
wires.

Follow our tips:

For safety reasons, place the homemade machine in the case, leaving only the axle and abrasive wheel outside. Remember, the device will work from the network.
Select in advance the location where your drill sharpening device will be placed. It is advisable that it be on a metal table.
Next, place the electric motor on the tabletop using fasteners (clamps) and mark the locations of the holes for the bolts, if it has legs.
After this, remove the electric motor and make 4 holes.
Later, reinstall the engine and secure it carefully with the bolts.

Advice: If the engine does not have legs, you can strengthen it with metal strips (clamps).

The electric motor for our future machine must be equipped with a special elongated shaft, onto which a granular disk should be placed. For this:

Install the fastening nut by first cutting a right-hand thread at the end of the shaft.
Secure the disc with a washer and nuts.

If the diameter of the shaft and the disc holes match, then install a washer on the shaft, and then an abrasive disc. If the diameter of the shaft and the hole do not match, then you will need to add a bushing.

Make a special one in it first side hole with a thread for a bolt to be able to secure it tightly to the shaft. After this you can put the sleeve on.

If you can't decide on an electric motor, then just take an old motor washing machine. It is ideal for homemade device sharpening.

It is worth noting that you must prepare in advance the starter and wires that will subsequently need to be connected. It is very important that the starter has at least three to four open contacts. Its winding must be connected using two buttons to the phase line.

Attention! The electric motor will be unsafe, regardless of the type - during operation, the rotating shaft can accidentally wind up a cord, wire, or hair.

Advice: Make a metal box to protect the machine from dust, abrasive particles, and you from accidental injuries.

How to properly sharpen a drill on a machine

When sharpening, you must ensure that the two shoulders of the drill are identical. If you achieve such a correspondence, then the axis of rotation of the drill will completely coincide with the center of the hole.
Before you start sharpening, be sure to ensure that the abrasive disc is tightly secured.
Always start the process with a coarser abrasive. Once a burr appears on your drill, you can change the abrasive to a finer one.
Watch the sharpening angle.
Do not allow the windings to switch so that the abrasive disc rotates in reverse. It should always move only in the direction of the blade.

Please note that drills cannot tolerate excessive overheating. Cool the gimlet regularly while sharpening. But under no circumstances put a red-hot drill into water, as cavities may appear in it.

Additional accessories

Guide

To avoid holding the drill suspended during sharpening (this can lead to injury), provide a support or guide in the form of a small attachment. It is made from a strip of metal, bent as shown in the figure and screwed to the frame (base). The drill is rested on it and brought to the circle at the desired angle.

Goniometer

Make marks (marks) on the guide described above for the required sharpening angles. It will become much more convenient to use.

If this is difficult for you, cut off the top part of a regular protractor and glue it to the guide.

Angles less than 30 0 are not used for sharpening, so we sacrifice them.

Universal device

To facilitate sharpening of tools, in particular drills, a mechanism has been developed consisting of a drill chuck, a shaft, roller guides (sled) and a protractor.

The main substrate described above is made wide. A protractor is glued onto it. A hole is drilled into which a bolt is inserted, which serves as an axis for the rotating surface.

A plate is installed on it on a roller slide, on which a pipe with a cartridge on the axis is fixed. The plate itself moves forward/backward using a conventional feed mechanism (threaded axis).

At the bottom of the rotating plate there is a displacement limiter indicator. It serves to rotate the device to the desired angle and to lock it.

Working with the device

Metal drills are always hardened, but the products may become dull over time. Naturally, this is not a reason to throw them away. If you wish, you can sharpen the drill yourself using professional equipment or homemade devices.

Main types of sharpening

Experienced craftsmen know that sharpening a drill for metal can be different. depending on diameter and application features.

Single-plane sharpening is designed for drills with a maximum diameter of 3 mm. During the work process, it is possible that the edges may “paint”, so you need to be very careful. To properly sharpen the product, it should be applied to the circle and moved parallel to the surface.
The conical procedure is intended for larger metal cutting tools. In this case, the tool must be held with both hands, performing sequential sharpening.
Finishing is carried out after finishing sharpening. Thanks to this procedure, it is possible to polish the cutting edge and eliminate even the smallest nicks.

To sharpen a drill with your own hands correctly, you need to use the appropriate machines. Similar devices are divided into 2 groups.

If you are interested in the question of how to sharpen a drill for metal, then be sure to purchase the appropriate machine. Suitable for home use inexpensive model with average power. It will allow you to sharpen small drills for metal.

Naturally, when purchasing you need pay attention to the noise level, as well as the design of the model. The best option It will become a simple machine, because it will not be difficult to select the necessary parts for it.

It is necessary to buy such devices only in specialized places, since a technical passport is included in the kit. Moreover, you will be given a warranty card.

Using machines at home

As mentioned earlier, it is advisable to use household machines at home. With their help, it is possible to sharpen various types of drills. It is important to remember that for some varieties you will have to purchase the appropriate circles.

To sharpen a drill yourself, you should give preference to a machine equipped with a universal chuck. It allows you to clamp elements of various diameters.

Often included are:

keys;
collets;
spare parts;
lamp for the work area.

The most popular equipment is from Drill Doctor and GS. Similar products are designed for sharpening drills with a diameter of 2–13 mm and 14–34 mm. Unfortunately, this equipment does not allow sharpening very thin drills. For this purpose you will have to purchase a special machine.

All equipment designed for sharpening drills at home, has a number of advantages:

possibility of working from the mains;
high performance;
ease of use;
functionality;
sharpening accuracy;
affordable price;
compact dimensions;
light weight;
convenient control system, thanks to which you can adjust the intensity of sharpening and its speed.

Homemade sharpening devices

If you do not have the appropriate machine, you can sharpen it using other devices. We are talking about an electric drill or homemade equipment, created according to the drawing. It's best to give preference to the second option, otherwise you may ruin a lot of drills before you master proper sharpening.

You can even create a suitable device with your own hands from wood. So, a beam with holes corresponding to the diameter of the drills is fixed on a horizontal surface. The holes mentioned above are made at a slight angle to obtain the required sharpening angle.

Some craftsmen prefer an electric drill equipped with appropriate attachments. Naturally, range similar elements small, which makes it difficult to do the sharpening yourself. As a rule, a stone and a leash are included with the nozzles. If you plan to sharpen drill bits using a specific drill, you should immediately shorten the driver.

If you wish, you can make a similar attachment for a drill yourself, following the recommendations given in the corresponding video. Such devices must be equipped with fasteners for fixing the drill.

Features of the sharpening process

If this is your first time deciding to sharpen a part with your own hands, perform work in strict sequence.

The back surface is treated first. So, press the drill tightly and constantly make sure that the sharpening angle remains the same. As a result of processing, the tip of the drill will resemble a regular cone.
Next comes the turn of the cutting part.
The last stage involves finishing the back surface. In this case, you must make sure that the size of the jumper is no more than 0.4 mm. Naturally, for a large metal drill, this parameter should be slightly larger.

If something doesn't work out right the first time, don't despair. It's best to start practicing with tools that you're unlikely to need. The main thing is to learn how to apply pressure correctly and maintain the angle. In this case, it is necessary to take into account the fact that the side parts of the drill, and not the tip, are responsible for drilling. Accordingly, the edges must be sharpened.

It is important to remember that during the sharpening process small particles are formed. Due to heating, they fly away in the form of sparks. It is for this reason that safety precautions must be followed. We are talking about using safety glasses and gloves. Also, when sharpening, you should make sure that the drill is securely fixed. Otherwise, it may accidentally fall out of your hands.

If you decide to use an appropriate machine for sharpening, be sure to prepare workplace. In particular, we are talking about good lighting. Also need wear protective gloves and goggles.

To properly sharpen a drill with your own hands, you need use suitable equipment. This can be a household or industrial machine, as well as an electric drill with a special attachment. If you haven't tried sharpening a drill before, check out the corresponding video first.