TB Woods 4J-1 Coupler Flange

The TB Woods 4J-1 Coupler Flange is a critical power transmission component engineered for high-performance HVACR and industrial drive systems. As a Size 4 Type J Sure-Flex Plus flange, this unit is manufactured from sintered carbon steel using a precision powdered metal process to ensure uniform density and high tensile strength. This bored-to-size (BTS) flange features a 1-inch bore with a standard 1/4" x 1/8" keyseat, providing a secure, fixed-bore connection for motors, pumps, and compressors without the need for additional bushings. Designed for maximum efficiency, it supports speeds up to 7,600 RPM and is 100% retrofittable with existing Sure-Flex coupling installations, allowing for seamless integration during routine maintenance or system upgrades.

Built to withstand the rigors of heavy-duty applications, the 4J-1 flange utilizes a 4-way flexing action when paired with EPDM or Neoprene sleeves to absorb shock, vibration, and end float. The precision-machined face simplifies shaft alignment, requiring only a straightedge and calipers for accurate setup, which reduces installation time for field technicians. By leveraging the Sure-Flex Plus design, pros can achieve a higher torque rating of up to 156 in-lbs, often allowing for a more compact footprint than competitive elastomeric couplings. This industrial shaft coupler component provides a reliable, no-lubrication solution for rotating equipment, ensuring dependable service life in demanding environments from -30°F to 275°F.

• Precision Manufacturing: High-strength sintered carbon steel construction ensures long-term durability in pump and blower applications.
• Interchangeable Design: Fully compatible with original TB Woods Sure-Flex parts, making it an ideal drop-in replacement for worn Type J flanges.
• Simplified Maintenance: Non-lubricated design eliminates the mess and ongoing upkeep required by grid or gear couplings.
• High Speed Capacity: Rated for up to 7,600 RPM, making it suitable for high-velocity electric motors and centrifugal equipment.
• Advanced Misalignment Handling: Engineered to accommodate angular, parallel, and torsional movement, protecting critical bearings from premature wear.

What is the maximum torque capacity of the Size 4 J Flange?
When utilized as part of a complete Sure-Flex Plus assembly, the 4J-1 flange is rated for a nominal torque of 156 in-lbs, depending on the specific insert material selected for the drive.

Are special tools required for alignment on this coupling?
No. The precision-machined surfaces of the TB Woods 4J-1 allow for accurate coupling alignment using standard field tools like a straightedge, calipers, or feeler gauges.

Can I use this flange with a split sleeve design?
Yes, the 4J-1 coupler flange is compatible with Sure-Flex Plus JE, JN, JES, and JNS sleeves, providing flexibility for both close-coupled and easier-access maintenance configurations.

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.