TB Woods 7S-1 1/4 Flange

Maintain peak drivetrain efficiency with the TB Woods 7S-1 1/4 flange, an industrial-grade Sure-Flex Plus coupling component engineered for high-torque applications. Constructed from high-strength cast iron, this Size 7 Type S flange is bored-to-size at 1-1/4 inches with a standard 1/4" x 1/8" keyseat, ensuring a precise slip fit on commercial motor and pump shafts. The Sure-Flex Plus design offers a significant 30% increase in torque capacity compared to legacy models, allowing for torsional wind-up between 7 and 21 degrees to dampen vibration and protect sensitive HVACR equipment from shock loads. With a maximum rating of 5250 RPM and compatibility with EPDM, Neoprene, and Hytrel sleeves, this close-coupled flange effectively handles 4-way flexing action to account for parallel and angular misalignment. Built to eliminate the need for lubrication, the 7S114 is a direct interchange for industry-standard couplings, reducing maintenance overhead in intensive mechanical rooms.

Key Benefits

• 30% Higher Torque Rating: Optimized material geometry allows for increased power transmission through the Sure-Flex Plus sleeve interface.
• Precision Bore and Keyseat: Factory-finished 1.250-inch bore with 1/4-inch keyway facilitates rapid installation and secure torque transfer.
• Shock Absorption: The 4-way flexing action prevents end float and minimizes stress on motor bearings during startup.
• Zero Maintenance: Engineered for non-lubricated operation, preventing grease contamination in clean HVAC environments.
• High-Strength Casting: High-grade cast iron construction provides a rugged service life in demanding pump and fan applications.

Common Questions

Is this flange compatible with older Sure-Flex sleeves?
Yes, the TB Woods 7S-1 1/4 is 100% interchangeable with existing industry-standard flanges and sleeves. Upgrading to Sure-Flex Plus sleeves with this flange will maximize the torque capacity of your current setup.

What are the alignment tolerances for a Size 7 coupling?
When utilizing EPDM or Neoprene sleeves, this Type S flange can accommodate up to 0.020 inches of parallel misalignment and 1 degree of angular misalignment, significantly reducing the risk of premature shaft failure.

Does this include the set screws?
The 7S-1 1/4 typically includes a standard 5/16-18 setscrew located over the keyseat and a second at 90 degrees to ensure a secure lock to the shaft under high-vibration conditions.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.