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The flanks of the cutting edges of the tool are rubbed on a fine-grained whetstone moistened with water or oil. The flanks must be treated with the on both sides.
Figure 7 - Whetting of a shear tool
By repeated changing of the side, the burr is bent several times because it always evades to the side opposite to the flank which is being ground.
The movement is made in an oblique direction towards the edge till the burr is removed.
If the burr is not removed, it breaks off when the tool is used tearing gaps in the cutting edge and making the tool dull and useless soon.'
Whetting increases the service life of the cutting edge.
What characterizes the grinding
operation?
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What is understood by "self-sharpening" of the grinding
wheel?
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What is the purpose of
whetting?
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