TB Woods 4J-7/8 Flange

The TB Woods 4J-7/8 Sure-Flex Plus Flange is a high-performance sintered carbon steel coupling component engineered specifically for close-coupled power transmission applications. This Type J coupling flange features a 7/8" finished bore and a standard 3/16" x 3/32" keyseat, ensuring a precise slip fit on motor and pump shafts. Built using advanced powdered metal technology, the 4J78 flange provides exceptional dimensional accuracy and uniform material density, allowing for a 7,600 RPM maximum speed rating. Its precision-machined outside face serves as a reliable reference point for checking alignment with simple tools like a straightedge or calipers, effectively reducing setup time in the field. This sleeve coupling flange is designed for high-torque environments, offering up to a 30% increase in torque capacity when paired with Sure-Flex Plus EPDM or Neoprene sleeves. It is an ideal solution for technicians managing HVAC compressor couplings, industrial blowers, and centrifugal pump drive systems requiring dampening of torsional vibration and shock loads.

• Sintered Carbon Steel Construction: High-strength powdered metal provides superior durability and uniform material properties compared to standard cast components.
• Precision Alignment: Centrally machined outer diameters allow for fast, accurate alignment without the need for specialized laser tools.
• Optimized Torque Transfer: Compatible with Sure-Flex Plus elastomeric elements to handle high start-stop cycle loads and dampen motor vibrations.
• Standardized Bore Specs: Features a 7/8 inch bore with integrated 3/16 x 3/32 keyway and setscrews (one over the key, one at 90 degrees) for secure shaft attachment.
• Operational Versatility: Suitable for a wide range of industrial applications, including HVACR motor-to-pump connections and conveyor drives.

What sleeve materials are compatible with the 4J-7/8 flange?
This Type J flange is fully compatible with EPDM and Neoprene sleeves in one-piece solid (JE, JN) or split (JES, JNS) configurations. It is not intended for use with Hytrel high-torque sleeves.

Does this part include the internal flexible sleeve?
No, this is the coupling flange only. A complete Sure-Flex Plus coupling assembly typically requires two flanges and one flexible sleeve element, which must be sourced separately based on your application's alignment and temperature requirements.

Can I use this flange to replace a competitor's sleeve coupling component?
The TB Woods 4J series is 100% interchangeable with industry-standard Size 4 sleeve coupling flanges. However, for maximum performance and torque ratings, it is recommended to use genuine TB Woods components throughout the assembly.

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.