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Twist drill how to grind out broken pins, I have long been engaged in drilling operations, but the old row of long pins wrapped drill, this is particularly distressing, to the experts to teach out bro
Twist drill how to grind out broken pins, I have long been engaged in drilling operations, but the old row of long pins wrapped drill, this is particularly distressing, to the experts to teach out broken pins grinding method

As shown in the picture below?

As shown in the picture below. Twist drill two straight edge enclosure, grinding into each other staggered multi-flute, drilling on the chip.

In this way, the original piece of chip is divided into two or more chips, they are due to the length and shape of the different and each other squeeze pressure broken.

This is to grind into a "NiZhiFu" drill. However, it is not suitable for small diameter twist drills.

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