Zero-Max ETP-PS-R50 replacement pressure screw for ETP Power series R50 hydraulic keyless bushing. Actuates the hydraulic locking mechanism to secure the bushing to shaft and hub without keys or set screws. Genuine Zero-Max component ensures proper fit and function.

ETP-POWER keyless shaft bushings from Zero-Max consist of a double-walled hardened steel sleeve and flange filled with a specially designed pressure medium. The flange contains a single actuation screw piston with a seal that is used to pressurize and maintain pressure in the connection. The design is optimized to provide higher radial load capacity than the other single-screw models. Also, in the flange are two pre-machined bores that can be used to attach ETP-POWER to the mounted components when the connection is not pressurized.