TB Woods 7JN Insert

The TB Woods 7JN Insert is a high-performance neoprene sleeve coupling designed specifically for Sure-Flex Plus size 7 elastomeric units. This single piece neoprene solid sleeve utilizes a proprietary 4-way flexing action that effectively absorbs shock, parallel misalignment up to 0.020 inches, and angular misalignment up to 1 degree. As a mechanical power transmission component, the 7JN offers a significant 30% increase in torque capacity over standard sleeves, with a rated torque of 940 in-lbs and a maximum speed of 5,250 RPM. The one-piece solid construction ensures a secure, slip-free fit within the flanges, making it a reliable solution for demanding motor drive systems and industrial pump sets where oil resistance is critical.

Key Benefits

• Enhanced Torque Capacity: Delivers 940 in-lbs of torque, allowing for high-efficiency power transfer in compact footprints.
• Superior Misalignment Compensation: The 4-way flexing action reduces bearing wear by accommodating parallel and angular shaft irregularities.
• High Chemical Resistance: Neoprene construction provides excellent protection against oil, heat, and environmental degradation common in HVACR applications.
• Zero Maintenance: Solid design requires no lubrication or routine adjustments, reducing equipment downtime.
• Vibration Dampening: The elastomeric material naturally absorbs torsional shock and dampens peak system vibrations.

Common Questions

What is the difference between EPDM and Neoprene for a size 7 Sure-Flex Plus coupling?
Neoprene inserts like the 7JN are typically selected for environments where oil and grease exposure is present, whereas EPDM is better suited for standard outdoor or chemical applications. Neoprene provides high durability and heat resistance up to 200°F.

Can I use an older size 7 flange with the new 7JN neoprene sleeve?
Yes, the 7JN is engineered to be 100% interchangeable and backwards compatible with existing TB Woods size 7 flanges, providing a direct drop-in performance upgrade without requiring a full coupling replacement.

What are the maximum misalignment specs for the 7JN insert?
The 7JN neoprene sleeve is rated for a maximum parallel misalignment of 0.020 inches and a maximum angular misalignment of 1 degree to ensure optimal service life and protect connected machinery.

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.