FIELD: instrumentation. SUBSTANCE: thread gauge can be used to test thread of medium diameter. It has base 1, shaft 3, contact sensor 9, cage 8 and measuring threaded roller 5 mounted on base. Thread gauge is provided with clamp put on base 1 for movement in plane normal to axis of shaft 3. Contact sensor 9 is coupled with clamp. Measuring roller 5 is put on shaft with clearance and capability to interact with it. Element 7 loaded with spring 6 interacting with measuring roller 5 is set on shaft 3. Serviceability of thread is found by touch of jaws of clamp 10 when measuring roller 5 rolls over tested thread of part. EFFECT: enhanced precision of test. 8 cl, 4 dwg
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