The 641-007 1 inch heavy retaining ring is a carbon steel clip used to secure the drive pulleys of the 4 and 6 inch wet sander drive pulleys on the shaft.
936-007 5 x 2 inch drive pulley is a two-piece heavy duty pulley with steel hub. The 2FSM 2 x 48 inch belt sander pulley has a broach metal hub and set screw. This set screw fastens the part to the motor drive shaft.
936-030 4 x 2 inch steel idler pulley is an easy to replace heavy duty pulley with sealed bearings made for the 2 x 48 inch belt sanders. The Idler pulley features steel construction, sealed bearings, and a pulley adaptor.
936-030IPA replacement 2 inch idler pulley assembly. This sander assembly consists of the following steel idler pulley with sealed bearings and tension rod.