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Date: | Tue, 24 Dec 96 01:44:15 UT |
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In the 1980's, spindle runout of drills was generally measured statically by
manually rotating the spindle and mechanically measuring runout. Then, methods
to measure spindle runout dynamically became popularized as electronic
equipment made by companies such as Lion Precision became available to measure
runout at full operational speed. I am looking for information about when this
transition took place, and what the industry practice was in 1989 (ie. - were
runout specifications for drills given by manufacturers usually a static
measurement or a dynamic measurement). Thanks
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