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.