►Langfeng tell you how to improve the drill  bit processing pathway and straight groove and flat diamond drill features
1) sub-flutes
Role: role play breaker, cutting force, suitable for processing copper and aluminum parts.
2) straight flute drill
Role: Chip poor, abrasion resistance, impact resistance, from the guide (which can reduce part of the process), feed fast, slow process. Suitable for brass processing.
3) flat drill
Role: sharp, chip, impact strength is poor, easy to break, slow feed, processing fast. Suitable for brass processing.

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