Modern Machine Shop, March 1st, 2000
The biggest problem with micrometers, some of the most popular and versatile precision hand-held measuring tools on the shop floor, is that measurements are subject to variations from one operator to another. There are two types of influences that contribute to this variation: "feel," or inconsistent gaging force, and subjective factors.
The micrometer is a contact instrument. Sufficient torque must be applied to the micrometer to make good positive contact between the part and the instrument. The only torque calibration in the human hand is the operator's "feel." What feels like solid cont...
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