Correct grinding bit for concrete sds

A concrete drill is a special drill bit, the cutting part of which is made of alloys based on tungsten and titanium. A drill of this kind is designed to drill bricks, concrete, stone and marble. Properly sharpened sds drill guarantee fast drilling and saving. The drill has two functions: it acts as a spiral drill, breaking the material like a chisel.

Most often, the drills for concrete are a rod with a soldered tip of carbide material.

Unlike drill bits for concrete and stone, the drill bit sds plus is used when working with a perforator. The force acts on the instrument not only in the plane of rotation, but also the force of impact. Boer works in very harsh conditions.

During operation, any cutting tool is dull, including drills and drills. The tools heat up, the drilling time increases.
In the drill, the drill also experiences a shock load and the question arises as to how to sharpen a drill bit on concrete.

Some tips in the drilling process that allow the drill bit to be extended for concrete:

1. Always check the heating of the tool, preventing its overheating.

2. When drilling ceramic tiles, do not use the perforator mode.

3. Do not cool the drill bit or drill with a sharp dip into the water.

Tips for sharpening the drill at home

Before you learn how to sharpen a drill or drill for concrete, it is necessary to clarify the main features of the design of the instrument.
The working edge of the drill is formed by the convergence of the front and rear faces. The angle between the leading edge and the axis of the drill is 30 °.The angle between the trailing edge and the axis of the drill is 60 °.
The working edges of the drill should form an angle of 120º.

There is an opinion that the drill sds + for concrete does not require sharpening and is replaced with a new one after complete wear and tear. This version is especially warmly supported by the workers of the shops of the construction tool.
But if you learn how to sharpen a drill or drill correctly, you will find that the drill life can be extended considerably.

Drill sharpening consists in setting the cutting edge of the drill of the desired shape.
The drill is sharpened, and the front and back faces.

When inserting a drill, only the cutting edges of the tool should work in the material, and do not touch the back surface of the drill.
The back surface of the drill must have a gap with the machined surface at any time during the drilling process.
Otherwise, the tool not only drills badly, but also heats up quickly, becomes dull, collapses.

Important tips how to sharpen a properly drill bit for metal.

How to sharpen a drill bit on concrete

And how to sharpen a drill for a perforator and what? The winner is a very strong alloy and on ordinary emery with a stone does not lend itself to quality grinding.
It is possible to sharpen a drill or drill on concrete correctly only on diamond or abrasive wheels made of silicon carbide or elborovyh. We highly recommend to buy a diamond circle for grinding a tool for a long time and the tool will be sharp.

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Work order

The circle should be mounted on a sharpening machine. Sharpening on a sharpener is carried out in strict observance of safety precautions. The thrust bearing is installed with minimal clearance, the work is done without gloves, the eye is protected by a special shield or spectacles.

Before sharpening, it is necessary to correct the peripheral surface of the circle with the help of the Elbor insert, that is, to straighten the sharpened surface of the stone.

Before proceeding to an answer to the question of how to sharpen a drill for concrete at home, consider in detail the grinding process.

We make a standard sharpening of the drill bit for concrete.
After fixing the device, we put a drill on it, we bring it to the surface of the grinding stone so that the cutting edge is parallel to the plane of the grinding stone.
We sharpen both edges, controlling their symmetry to the clearance and the angle between them to 120º.

Turning to the sharpening of the leading edges
The drill falls on the fixture providing an angle of 30º.The drill is fed to the sharpened plane of the stone at an angle of 30º and the front face is sharpened.
Turn the bit by 180º and sharpen the second leading edge.
Now the drill must be brought to the sharpened surface of the stone at an angle of 60º.This is achieved by laying the drill bit on the other part of the device.

Sharpening of the back faces is made in the same way.
If after sharpening you have cutting edges of different sizes, the sharpening should be repeated in full.

For a full understanding of the grinding process on the sharpening machine, review the training video.

With a sharpening machine everything is clear. And you can use the terminated diamond disc for Bulgarians.
And here, to sharpen a drill on a Bulgarian, the latter must be carefully fixed.

To ensure high-quality sharpening of the drill, it is necessary to equip the machine with a thrust bearing, which must be supported by a drill when sharpening. A piece of a corner, firmly fixed on a bulgarian or a table, can serve as a pad.

If the diamond disc does not become a bulgarian, then it can be easily secured by performing the complex manipulations shown in the video about sharpening the drill.

When grinding, it is necessary to give the back surface of the drill the required shape.
Cutting edges are sharpened at the drill, and the back surface is removed. Any point on the back of the drill must not touch the material being processed.

A few words about

attachments Adaptations can be made not only from a wooden block, but also from a corner. The main task is to ensure that the sharpened bit is fed to the grinding plane with the desired angles.
By the way, the devices from the corner are more accurate, reliable and durable.
When grinding, it does not require special accuracy of keeping the corners. But the symmetry and dimensions of the cutting edges must be observed.
Good luck to you! Dare.