Timken QF-3S4 1 2 Quick Flex Shaft Coupling Hub

Description:

The Timken QF-3S4 1/2 QUICK FLEX® coupling hub is used in flexible shaft coupling systems to transmit torque while accommodating shaft misalignment in industrial power transmission applications. Commonly installed on electric motors, gearboxes, pumps, compressors, conveyors, fans, 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 dependable power transmission and minimize equipment downtime.

Applications:

The Timken QF-3S4 1/2 QUICK FLEX® coupling hub is designed as a precision-machined hub with a finished bore and keyway for secure shaft mounting in QUICK FLEX® coupling assemblies. It is widely used in manufacturing plants, mining operations, material handling systems, water treatment facilities, and industrial processing equipment where reliable torque transmission, vibration damping, and simplified maintenance are essential.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): QF-3S4 1/2
• Product Type: QUICK FLEX® coupling hub
• Series: QUICK FLEX®
• Hub Style: Standard hub with finished bore and keyway
• Bore Size: 1/2 in
• Coupling Type: Elastomeric flexible coupling hub
• Material: Steel
• Mounting Style: Keyed bore with setscrew
• Compatible Components: QUICK FLEX® insert and cover
• Function: Torque transmission with vibration damping and shaft misalignment compensation
• Application: Industrial power transmission systems

Common Replacements:

• Timken QF5S303X1/2
• Timken QUICK FLEX® standard hub 1/2 in bore
• Lovejoy QUICK FLEX® 1/2 in coupling hub equivalent