TB Woods 3J-1/2 Coupler Flange

The TB Woods 3J-1/2 Coupler Flange is a size 3, sintered carbon steel Type J flange engineered for reliable torque transmission in HVACR and industrial pump applications. Featuring a precise 1/2" bore and a standard 1/8" x 1/16" keyseat, this Type J Sure-Flex Plus component provides a robust bored-to-size (BTS) fit that eliminates the need for additional bushings. The powdered metal manufacturing process ensures high dimensional accuracy, while the precision-machined outside face allows for quick alignment using only a straightedge. This Sure-Flex Plus flange is designed for high-speed operation up to 9,200 RPM and is fully compatible with EPDM and Neoprene sleeves. Its unique 4-way flexing action effectively absorbs shock, vibration, and shaft misalignment, protecting the motor and driven equipment from premature wear. Built to handle the rigorous demands of compressors and centrifugal pumps, this flexible coupling flange facilitates a secure, slip-fit installation for keyed shafts.

• Sintered Carbon Steel Construction: High-strength material ensures uniform material properties and long-term durability in heavy-duty environments.
• Bored-to-Size Accuracy: Pre-machined with a 1/2" bore and dual setscrews (one over the 1/8" keyway and one at 90°) for maximum shaft retention.
• Maintenance-Free Operation: The Sure-Flex Plus design requires no lubrication, significantly reducing service intervals and downtime.
• 4-Way Flexing Action: Specialized geometry allows for the absorption of angular, parallel, and axial misalignment without excessive bearing loads.

Common Questions

The 3J size Type J flange is fully compatible with TB Woods size 3 EPDM (JE) and Neoprene (JN) sleeves. It is not designed for use with Hytrel or Urethane sleeves.

No. One of the primary benefits of the Sure-Flex Plus series is that the flanges are precision-machined, allowing for accurate alignment using standard calipers or a straightedge.

In a standard configuration, the size 3 series is rated for speeds up to 9,200 RPM. Torque capacity depends on the sleeve material used, with EPDM and Neoprene providing a 30% increase in torque rating compared to previous generations.

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.