Manufacturing And Production Technology
Tool life is measured by the

Time the tool is in contact with the job
Volume of material removed between tool sharpenings
All of the listed here
Number of pieces machined between tool sharpenings

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Manufacturing And Production Technology
In plunge grinding

The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face

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