FIELD: machine tool manufacture. SUBSTANCE: tracer pin has axle 1 on which rollers 2-4 are mounted, axle 9 of roller 4 is eccentric to axle 8 of rollers 2, 3. The pin is located in slot 11 of part 12 fastening axle 1 to drive part 13. When axle 1 moves along slot 11 rollers 2, 3 roll on one of its walls, and roller 4 - on the other one tracing a particular trajectory. EFFECT: improved structure. 2 dwg
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