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Drill breaks when drilling with twist drill bits

Possible cause for the drill breaks when drilling

1: Spring or back lash in press or work

2: Too little lip relief

3: Speed too low in proportion to the feed

4: Dull drill

5: Improper chip clearing


How to do drill breaks when drilling with twist drill bits

1: Test press and work for rigidity and alignment

2: Regrind properly

3: Increase speed or decrease feed

4: Sharper drill

5: Correct application

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