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Torque testing a tap
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Abstract
Greenfield Tap & Die Co.
Description
This picture demonstrates the torque forces required for the use of GTD taps as each cuts a screw thread. The test station is using a Baldwin SR-4 Type T torque pickup, and is recording the forces required to cut the resulting thread on a chart recorder. A similar demonstration of this shown at minute 24 of the 1952 GTD film "Facts About Taps & Tapping"