Made entirely in Switzerland and formerly also sold under the name Interapid, Alina, or SPI. These gages have been discontinued. Depending on the damage, they can sometimes still be repaired. Small supplies of extensions and contact points may be available.
Compac and Interapid bore gages measure by comparison and therefore must be calibrated before use by means of one of the following:
To calibrate the bore gage, proceed as follows:
Compac model IA2A-IAP555A shown above, along with 2 of the contacts and extensions.
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