W1

Wi1

Rough hole when drilling with twist drill bits

Possible cause for the drill breaks when drilling

1: Dull or improperly ground drill

2: Lack of lubricant or wrong lubricant

3: Improper set-up

4: Too much feed


How to do drill breaks when drilling with twist drill bits

1: Regrind properly

2: Lubricant or change lubricant

3: Check set-up

4: Reduce feed

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