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close this bookGrinding of Simple Tools - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 19 p.)
View the document(introduction...)
View the document1. Purpose of grinding
View the document2. Machines for grinding
View the document3. Tools for grinding
View the document4. Operation of grinding
View the document5. Operation of whetting
View the document6. Examples for off-hand sharpening with straight wheels
View the document7. Hints for mounting and dressing of grinding wheels
View the document8. Labour safety recommendations

5. Operation of whetting

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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