10/05/2015

Twist drill sharpening techniques – high-speed steel cone shank twist drill grinding(2)

10/05/2015 langfeng high speed twist drill

Formula 3: ” behind by twist drill grinding blade consistency.” Here refers to the start bit parts along the entire blade slowly after grinding,For convenient grinding and heat dissipation. Three formulas: ” from the edge toward the back [Read More]

Twist drill sharpening techniques – high-speed steel cone shank twist drill grinding（1）

10/05/2015 langfeng high speed twist drill

If you get a bit in a hurry the grinding, grinding must be blind. Only put good position before grinding, the ” ground” for the next step to play solid foundation, this step is very important. The technique [Read More]

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