Roller coupling HP LJ 4000/4050/4100/COLOR/LJ 4500/4550, RB1-8974, RB1-8974-000CN

HP RB1-8974-000CN separation roller clutch is a printer feed mechanism part, also known as a torque limiter. It is listed as the clutch for the separation roller in the 500-sheet tray parts table of the HP LaserJet 4000 service manual.

This part is intended for the separation roller assembly, where the clutch serves as a torque-limiting component in the paper handling mechanism. The exact part reference is RB1-8974-000CN. It is a specific clutch component, rather than the roller itself.