The Timken Company QF250XPB Jaw Coupling Hub

The Timken QF250XPB QUICK FLEX straight jaw coupling hub is a rugged replacement component for flexible shaft coupling systems, delivering torque transmission with vibration damping while compensating for minor shaft misalignment. Part of the Timken QUICK FLEX family for Size 250 couplings, this steel hub features a plain (pilot) bore with a 1.500 in pilot diameter and requires machining to the target shaft size before installation. Its dimensions include an outside diameter of 7.480 in, a hub end diameter of 5.790 in, and a through-bore length of 3.100 in, with a set-screw mounting style for secure retention. Rated up to 3,800 rpm, it is used across electric motors, gearboxes, pumps, compressors, conveyors, and mixers, and finds application in mining, manufacturing, aggregate processing, water treatment, and material handling where reliable torque transmission, vibration damping, and shaft misalignment tolerance are essential. The QF250XPB hub is intended for maintenance, repair, retrofit, and equipment overhaul, aligning with Timken QUICK FLEX Size 250 couplings to restore power transmission and minimize downtime.