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Mechanical movements, powers and devices (1911)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 349
1401. SCREW THREADS, Trape-zoidal thread. Angle 90° face, 45° back.Depth equals 0.75 of the pitch. 55^ MILL AND FACTORY APPLIANCES. … 1402. SCREW THREADS, squarethread. Angle square. Depth equals -|-half pitch. Width between threads equal-j- half pitch, for clearance. 1403. SCREW THREADS, Powellsthread. Depth of thread equals -f- halfpitch. Width of top of thread, 0.37-ofpitch. Width of bottom, 0.37 -{- of pitch.Angle of side,…Mechanical movements
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