A-Drive 40:90 Drive Shaft Key Stock

The A-Drive 40:75 Drive Shaft Key Stock slides into the slot on the double worm reducer gearbox where the drive pipe comes into the gearbox. Replacement part for all 40:90 enclosed gearboxes. Measures 3 1/2 in. L x 5/16 in. W x 5 /16 in. H. Made from hardened, plated steel and cut to length for the input size.

What is a key stock?

Key stock is a small metal block or wedge inserted between a shaft and the hub of a pulley, gear, sprocket, or another rotating power device. It provides driving torque and prevents movement. One part of the key fits into a precut slot in the shaft known as a key seat. The remainder slides into a groove in the hub called a keyway.