Thread: Tyzack lathe
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Jim Wilkins[_2_] Jim Wilkins[_2_] is offline
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Default Tyzack lathe

"James Waldby" wrote in message
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On Mon, 02 Mar 2020 12:26:59 -0800, Stephen Dixon wrote:


Target is 25.4 tpi = 0.0394" = 1.0 mm
tpi: 25.422 = 0.9991 mm ABCD: 45 55 50 65
tpi: 25.455 = 0.9979 mm ABCD: 20 35 55 50
tpi: 25.333 = 1.0026 mm ABCD: 40 50 45 57
tpi: 25.319 = 1.0032 mm ABCD: 35 45 65 80


37 and 47 tooth gears fastened together give an almost exact metric
conversion ratio, and are smaller than the correct 127 tooth gear
which may not clear.