The Timken Company QF250XPB Jaw Coupling Hub

Description:

The Timken QF250XPB QUICK FLEX® coupling hub is used in flexible shaft coupling systems to transmit torque while accommodating vibration, shock loads, and minor shaft misalignment in industrial power transmission applications. Commonly installed on electric motors, gearboxes, pumps, compressors, conveyors, mixers, and other rotating equipment utilizing Timken QUICK FLEX® couplings. Maintenance teams, OEMs, and system integrators use this coupling hub for replacement, repair, retrofit, and equipment overhaul to restore reliable power transmission and minimize equipment downtime.

Applications:

The Timken QF250XPB is a QUICK FLEX® straight jaw coupling hub with a 1-1/2 in plain pilot bore, designed for machining to the required shaft size before installation. It is widely used in mining, manufacturing, aggregate processing, water treatment, and material handling applications where reliable torque transmission, vibration damping, and simplified maintenance are essential.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): QF250XPB
• Product Type: QUICK FLEX® coupling hub
• Series: QUICK FLEX®
• Coupling Size: 250
• Hub Style: Straight jaw pilot bore hub
• Bore Type: Plain (Pilot) Bore
• Pilot Bore Diameter: 1.500 in
• Hub Material: Steel
• Outside Diameter: 7.480 in
• Hub End Diameter: 5.790 in
• Length Through Bore: 3.100 in
• Mounting Style: Set screw
• Maximum Speed: 3,800 rpm
• Compatible System: Timken QUICK FLEX® Size 250 couplings
• Function: Torque transmission with vibration damping and shaft misalignment compensation

Common Replacements:

• Timken QF250X1-1/2
• Timken QF250X1-3/4
• Timken QF250X2