Shimano vintage 3 Speed Hub 112mm Rear hub

PLEASE NOTE: Shimano publishes hub dimensions in a relatively confusing manner on bike.shimano.com. They seem to provide the outside-to-outside flange spacing, and an overall offset of the flanges as a whole. Wheelbuilders are interested in the distance from the midpoint between locknut faces to the middle of the flange (not the inside or outside face). When necessary, I convert Shimano's data into useful spoke calculation dimensions with some simple arithmetic, and factor in 3mm thick hub flanges (an approximation). The formula is to divide spacing by two, add or subtract the overall offset, then subtract half of our assumed 3mm flange thickness. Please check the notes to see if the values for this part are derived from Shimano's published data or actual measurements of a hub specimen. -Karl

8/10/2022 -- Measured a well-used hub during wheel rebuild. Axle is 3/8-26 and 153.4mm overall length. Pushrod is 108mm overall length with a 3.2mm shaft and 5.0mm head that is 1.4mm tall. Uses all-metal bell crank that threads onto the axle end and locks in place with one small locknut. Plastic oil port is roughly centered between flanges opposite the stamped markings that say "SHIMANO 3speedHUB USA PAT 3021728" Weight of 1012g is with all axle hardware, pushrod, bell crank, and snapring, but no cog. -Karl