Tb Wood'S
Tb Wood'S 7JNS Sure-Flex Sleeve Coupling Insert Neoprene
A neoprene sleeve coupling insert rated for 5,250 RPM and 940 in-lb torque with 1-degree angular misalignment capacity
- Handles up to 940 in-lb torque for reliable power transfer
- Runs at 5,250 RPM maximum speed for high-speed applications
- Operates up to 200 °F for demanding environments
- Neoprene construction resists oil and wear for longer life
- Accommodates 1° angular and 0.02 in parallel misalignment
Purpose and fit
The Tb Wood's 7JNS Sure-Flex sleeve coupling insert is a neoprene flexible element sized for coupling size 7. It suits maintenance crews and OEMs fitting blowers, compressors, conveyors, mixers, motors and pumps where up to 1 degree of angular and 0.02 in parallel misalignment must be absorbed. The 1.5 hp rating at 100 RPM matches light-duty industrial drives.
Thermals and power draw
Neoprene construction tolerates continuous operation up to 200 °F without lubrication. The insert transmits a maximum torque of 940 in-lb at speeds up to 5,250 RPM while its torsional stiffness of 2,769 in-lb/rad dampens vibration across the driveline. No external cooling or power supply is required.
Build and connections
The one-piece split design slips between two hub halves for quick replacement without moving connected shafts. An outside diameter of 4 11/32 in and insert width of 2 3/16 in fit the standard 7J envelope. Inch-series dimensions simplify sourcing matching hubs for North American machinery.
Highlights
- Handles up to 940 in-lb torque for reliable power transfer
- Runs at 5,250 RPM maximum speed for high-speed applications
- Operates up to 200 °F for demanding environments
- Neoprene construction resists oil and wear for longer life
- Accommodates 1° angular and 0.02 in parallel misalignment
Specifications
No published specifications for this item yet.
Questions about this item
How do I install the 7JNS insert into the coupling hubs, and what step is often missed?
Slide the one-piece split neoprene sleeve over the hub teeth; the step often missed is verifying the 0.02 in parallel and 1 degree angular alignment limits before tightening.
When will the neoprene insert need replacement under normal operation?
Plan replacement when the insert exceeds the 200 degrees F maximum operating temperature or shows cracking from torque cycles beyond the 940 in-lb rating.
What is the first limit reached during continuous high-speed use?
The 5,250 RPM maximum speed limit is reached before the 940 in-lb torque or 200 degrees F temperature limits under sustained operation.
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