Drill grinder test - comparisons. Com 2024

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This is how you can breathe new life into dull drill bits

A drill is part of the standard equipment of every hobby craftsman. while the dry drill or the pillar drill have a long service life, the situation is different with the drills. They are expendable items. Replacing them with new ones every time they become dull can be quite expensive. Regrinding by a specialist not only costs time but also money. Some people try to do it themselves with a wet grinding machine, but that takes a lot of experience and skill. In the long run, a drill grinder is cheaper and quickly pays for itself. This drill grinder comparison would like to introduce you to the usefulness of such a drill grinder bestseller. In our table we have already presented you with some of the drill grinder comparison winners.

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Different angles when grinding

Normal drill bits are usually sharpened at an angle of 118°. That is why our drill grinder purchase recommendation is to buy a model with at least an angle of 118°. For very hard materials, such as carbide drills, a further angle of 135° is recommended. Bestseller drill grinders therefore have at least these two angles on offer.

Are power and revs important?

The performance of the drill grinder is important to ensure that the drill bit does not grind more slowly over time. Therefore, a drill grinder should have an output of around 100 watts. For very hard drills it can also be more, which of course makes the model more expensive. However, the speed says nothing about the quality of the drill grinder, but rather something about the handling:

• > 7.000 rpm, professional drill grinder
• < 2.000 rpm, drill grinder recommendation for beginners
• 3.000 to 6.000 rpm, medium speed suitable for professionals and beginners alike.

What should be considered when cross-polishing?

A cross-grind is used for particularly high-quality drills. In doing so, they have additional cutting lips and a narrower tip, which reduce the risk of an imprecise hole. This helps the drill to center better and usually makes “pre-punching” superfluous. The drill finds its guide immediately and cannot slip off.

Which drill diameters can be ground?

A drill chuck is required to accommodate different sizes. As a rule, it takes diameters between 3 and 13 mm, which is quite enough for home use. Of course, professionals need larger or smaller diameters.

What grindable angles are required?

In general, angles of 118° and 135° are perfectly adequate. These angles are usually already preset. For softer and harder materials, you should select presets from 90° to 120° or from 120° to 140°.

Where can you buy good drill grinders?

A drill grinder can be purchased in almost every hardware store and even more so in special tool shops. But it can also be done online. At the same time, you have the advantage of finding the best drill grinder and comparing the price of the drill grinder at the best price/performance ratio among those selected.

What does Stiftung Warentest have to say about a drill grinder test report?

Drill grinders have not yet been among the tools tested by the independent testing institute. Anyone who is still interested in tests or reports on drill grinders should take a look at the test magazine "Heimwerker Praxis".

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Conclusion

If you often work with metal drill bits, you should also get a drill grinder, so that drill bits that have become blunt can be sharpened again and you can save yourself having to buy new drill bits. It is only interesting that neither wood nor stone drills can be sharpened with it, only metal drills.

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