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Sunday, 2 March 2014

Grinding of Drill Point

Grinding of Drill Point Points : Grinding of Drill Point, Sharpening a drill by hand Grinding of a drill it means sharpen of cutting lips on a tool grinder. Sharpening a drill by hand Frequently it is required to grind drill by hand. To correctly grind a drill two main factors must be consider:
1. Correct lip clearance is necessary to successful drill. Lip clearance is release ground straight after the cutting lips so just cutting lips will go into metal. If there is no sufficient clearance last the lip point of the drill rub and cannot cut the metal. Above clearance angle will dull quickly or outer corners break away.
2. Length of cutting lips has to be equivalent. Drill point gauge is use to measure angle with length of the cutting lips of a drill.

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