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SOUTH BEND LATHE MODEL 9C ( 1937-1940 ) 80/63 METRIC TRANSLATION RING GEAR
by timbologist
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This is a Metric Translation gear for cutting metric threads on an imperial leadscrew lathe this was designed for a South Bend lathe model 9C.
The teeth have 14.5 degree pressure angle
The gear has a DP of 18
The module is 1.411
The 63 tooth has an designed inside dia of 75mm but ends up about 74.4mm
The 80 tooth has a designed inside dia of 100mm but ends up about 99.3mm
The 63 tooth ring has 1mm step so it give a gap between the gears so it is 3/8" wide + 1mm
The 80 tooth ring
The teeth have 14.5 degree pressure angle
The gear has a DP of 18
The module is 1.411
The 63 tooth has an designed inside dia of 75mm but ends up about 74.4mm
The 80 tooth has a designed inside dia of 100mm but ends up about 99.3mm
The 63 tooth ring has 1mm step so it give a gap between the gears so it is 3/8" wide + 1mm
The 80 tooth ring
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