Harden bottom bracket
Author: Alexander Von Tutschek
Harden Bottom Bracket Unit Part No C5000
This is an alloy unit in which are fitted bearing races and a tool-steel axle in the end of which is a grease nipple. The barrel of the unit is 2 5/8" long and to use this device the threads of the bracket must be removed, it is held in place by a locking ring at either end.
This is another rare Harden product designed by the same man who designed the Freewheel hub.The word Harden is sometimes marked on one face of the unit.