How To Sharpen The Sds Plus And Sds Max Drill Correctly For Concrete For A Rotary Hammer

2023 Author: Philip Bishop | [email protected]. Last modified: 2023-08-25 07:54

• Tips for sharpening a drill at home
• Methods for sharpening concrete drills
• Work order
• Moving on to sharpening the leading edges
• A few words about devices

A drill for concrete is a drill of a special design, the cutting part of which is made of alloys based on tungsten and titanium. The drill of this design is intended for drilling in brick, concrete, stone and marble. A properly sharpened sds drill is the key to fast drilling and savings. The drill has two functions at the same time:

1. It acts as a twist drill.
2. Breaks the material like a chisel.

Most often, concrete drills are a rod with a soldered carbide tip.

Unlike the drill for concrete and stone, the sds plus drill is used when working with a hammer drill. The tool is influenced not only by the force in the plane of rotation, but also by the impact force. The drill works under very harsh conditions.

In the process of work, any cutting tool becomes blunt, including drills and drills. The tools heat up and the drilling time increases.

In a hammer drill, the drill also experiences an impact load and the question arises of how to sharpen the drill on concrete.

A few tips during the drilling process to extend the life of a concrete drill:

1. Keep an eye on the heating of the tool at all times to avoid overheating.
2. Do not cool a hot drill or drill bit by a sharp dip in water.
3. When drilling ceramic tiles, do not use the punch mode.

Tips for sharpening a drill at home

Before you know how to sharpen a drill or drill bit for concrete, you need to clarify the main design features of the tool.

The working edge of the drill is formed by the convergence of the front and rear edges. The angle between the front face and the bore axis is 30 °. The angle between the back face and the axis of the drill has a value of 60 °.

The cutting edges of the drill should form a 120 ° angle.

There is an opinion that the sds + drill for concrete does not require sharpening and is replaced with a new one after complete wear. This version is especially warmly supported by workers in construction tool stores.

But by learning how to sharpen a drill or drill correctly, you will be convinced that the life of the drill can be significantly extended.

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

When penetrating the drill into the material, only the cutting edges of the tool should work, and the back of the drill should not touch the work surface.

The back surface of the drill at any time during the drilling process must have a gap with the work surface.

Otherwise, the tool not only drills poorly, but also quickly heats up, becomes blunt, and collapses.

Important tips on how to sharpen a metal drill correctly.

Methods for sharpening concrete drills

And how to sharpen a drill for a hammer drill and what? Pobedit is a very strong alloy and does not lend itself to high-quality sharpening on ordinary emery with a stone.

It is possible to properly sharpen a drill or a drill on concrete only on diamond or abrasive wheels made of silicon carbide or CBN. We highly recommend buying a diamond wheel for sharpening the tool, it lasts for a long time and the tool will be sharp.

Work order

The wheel must be installed on a sharpening machine. Sharpening on a sharpening machine is carried out in strict observance of safety measures. The foot pad is installed with a minimum clearance, work is carried out without gloves, the eyes are protected by a special shield or glasses.

Before sharpening, it is necessary to correct the peripheral surface of the circle using an elbor insert, that is, to level the sharpening surface of the stone.

Before proceeding to the answer to the question of how to sharpen a concrete drill at home, we will consider in detail the sharpening process.

Let's make a standard sharpening of a drill for concrete.

Having fixed the device, we put the drill on it, 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 light and the angle between them is 120 °.

Moving on to sharpening the leading edges

The drill rests on a 30 ° angle fixture. The drill is guided to the ground plane of the stone at an angle of 30 ° and the front edge is sharpened.

Turning the drill 180 °, we also sharpen the second front edge.

Now the drill must be brought to the ground surface of the stone at an angle of 60 °. This is achieved by placing the drill on another part of the fixture.

The rear edges are sharpened in a similar way.

If after sharpening you have different cutting edges, the sharpening should be repeated in full.

For a complete understanding of the sharpening process on a sharpening machine, watch the tutorial video.

Everything is clear with the sharpening machine. Or you can use a diamond disc for a grinder that has served its life.

But in order to sharpen the drill on the grinder, 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, on which the drill must rest when sharpening. A piece of a corner, firmly fixed on a grinder or a table, can serve as a heel pad.

If the diamond disc does not stand on the grinder, then it can be easily fixed by performing the simple manipulations shown in the video about sharpening the drill.

When sharpening, the flank of the drill must be shaped to the desired shape.

The cutting edges of the drill are sharpened and the flank is removed. Any point on the flank of the drill should not touch the material being cut.

A few words about devices

Fixtures can be made not only from a wooden block, but also from a corner.

The main task is to ensure that the drill to be sharpened is fed to the sharpening plane at the desired angles.

By the way, fixtures from the corner are more accurate, reliable and durable.

Sharpening does not require particular precision in cornering. But the symmetry and dimensions of the cutting edges must be observed.

I wish you success! Go for it.