8 Drill Bit Problems and Solutions

The most popular 8 drill bit problems are drill bit breaking, margin wearing, drilling non-cylindrical holes, hole expansion, poor surface finish the drilled hole, chip clogging inside the drilled hole, drill bit noising and drilled hole is not accurate. You can solve all of these problems by referring the below guide.

1. Why is Drill Bit Broken?

A drill bit can be broken due to overheating, wandering, losing the tool, workpiece movement, selecting the wrong drilling method, incorrect RPM, and feeding.

Solution for the Drill Bit Breaking

You should use the recommended RPM, Point angle, Cutting and lips angles, proper drill bit, and drilling machine to prevent the drill bit from breaking while drilling.

If you need to study in-depth Why do drill bits break? Read this.

2. Why Do Drill Bits Margin Wear?

Drill bit margin wears due to rubbing wall, poor chip evacuation, and workpiece movements, and drilling sudden strong materials.

Solution for the Drill Bit Margin Wearing

You can use the correct drill bit angle, use a correct drill bit, and sharpen the drill bit to prevent the drill bit margin wearing.

3. Why Does Drill Bit Drill Non-Cylindrical Hole?

Drill bit drill noncylindrical hole due to wandering, improper point angle, workpiece movement, incorrect speed, feeding, and selecting wrong drill type.

Solutions to Prevent Drilling Non-Cylindrical Holes

You can avoid drilling non-cylindrical holes by using a proper drill bit with a proper point angle, you can drill a perfect hole.

4. Why is Drilled Hole Expansion?

A Drilling hole is expanded due to loosening chuck, non-symmetrical point angle, different lip height, and run-out chisel edge.

Solutions to Prevent Drilled Hole Expansion

You can solve this by choosing the right drill bit, proper sharpening, and using the proper precision drill bit.

5. Why is the Drilled Hole Surface Have a Poor Finish?

Drill hole surface has a poor finish due to low RPM, high feed rate, blunt drill bit, no suitable coolant, inside clogging the chips, and loosely holding the drill bits.

Solutions to Prevent Poor Drilled Hole Surface

You can avoid it by using a properly sharpened drill bit with the recommended RPM and feeding rate, using the coated drill bit, and using the proper drilling machine.

6. Why is Chip Clogging Inside The Drilled Hole?

Drill bit chips are clogged inside the drill bit when the chip production is higher than the removal rate. It can cause the drill bit to overheat and reduce the drilling performance. Also wood can cause fire too much chip clogging.

Solutions to Prevent Chip Clogging Inside the Drilled Hole

You can solve this problem by using proper lubrication, proper flute length and density drill bits, using lower RPM and using proper RPM according to the material type.

Due to the chip clogging inside you can observe drill bit is getting hot.

7. Why is Drill Bit Noise Chattering?

Drill bit noise occurs due to lack of cutting oil, bad alignment with chuck, higher RPM rate, and blunt cutting edge.

Solutions to Prevent Drill Bit Noise

You should use sufficient cutting oil and use the proper drill bit for the drilling process with recommended RPMs to prevent the drill bit noise.

8. Why is Drilling Hole Not Accurate?

The drilling hole is inaccurate due to loose tool, tool movement, workpiece movement, incorrect speed, and feed with selecting drill type. One of these reasons can be the reason for your problem.

Solutions to Increase Drilling Hole Accuracy

In order to Increase drilling hole accuracy, you can use a proper drill bit fixed to drill the machine tightly and use the recommended RPM and feed with cutting oils.

Tom Mackency

Tom Mackency

Hi, I am Tom Mackency. It has been 10 years that I have been working as a professional woodworker since 2013. I am really enjoying my carrier by creating many kinds of projects in my workshop. But mostly I like for home improvement projects. Home improvement and DIY projects are the most interesting things for me. More than that, the coolest things are power tools. Those are very precious and efficient than a decade ago. So I try to introduce so many things about power tools, woodworking, DIY projects, home improvement and many more interesting topics here.

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