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Coarse Thread Drive Shaft


Used in upper crank assemblies, and the lower left hand chain drive system found on some units.

The crank assembly gears and mechanism ride on this drive shaft. The drive hub extension tube threads onto the second set of threads of this shaft.

Video available

Common lift system problems related to drive shafts and hub extension tubes

Dimensions are 3 3/4" long and 5/8" diameter at it's widest point. The rear pin hole for the toothed sprocket sits at 7/8 of an inch as measured from the rear to the center of the hole.

The threads at the end of the drive shaft are coarse thread for the 5/8 nut.

Looking to add a coarse thread nut to your order?

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Part number 4751B3522