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Black neoprene sleeve coupling insert with retaining ring

Tb Wood'S

Tb Wood'S 8N Sure-Flex Sleeve Coupling Insert, Neoprene

SKU CH-0ZTM-CFDTY

Neoprene sleeve coupling insert handles 1,475 in-lb torque at 4,500 RPM for blowers, compressors and pumps

  • Handles 2.3 hp at 100 RPM for reliable power transfer
  • Absorbs vibration with neoprene construction for smoother operation
  • Accommodates 1 degree angular and 0.02 in parallel misalignment
  • Operates up to 200 degrees F in demanding environments
  • Rated for 4,500 RPM maximum speed in blower and compressor applications

8N Sure-Flex Neoprene Sleeve Insert

The TB WOODS 8N insert fits Size 8 Sure-Flex couplings and handles up to 1,475 in-lb of torque. It suits blowers, compressors, conveyors, mixers, motors and pumps that need flexible shaft connection. The two-piece design with a retaining ring simplifies installation and replacement on existing equipment. Buyers who need a different coupling size or a non-neoprene material cannot use this part.

Thermal noise and power draw

Neoprene construction absorbs vibration and runs at temperatures up to 200 °F without lubrication. The insert adds no measurable noise or electrical load to the drivetrain. Its torsional stiffness of 4,335 in-lb/rad limits wind-up under normal cyclic loads. Operators who require continuous operation above the rated temperature must select an alternative insert.

Deciding specification

The coupling is rated for a maximum speed of 4,500 RPM and delivers 2.3 hp at 100 RPM. Angular misalignment capacity is 1 degree and parallel offset allowance is 0.02 in. These limits determine whether the insert matches the shaft alignment and speed of the driven machine. If the application exceeds either misalignment value or the RPM ceiling, this insert is not suitable.

Highlights

  • Handles 2.3 hp at 100 RPM for reliable power transfer
  • Absorbs vibration with neoprene construction for smoother operation
  • Accommodates 1 degree angular and 0.02 in parallel misalignment
  • Operates up to 200 degrees F in demanding environments
  • Rated for 4,500 RPM maximum speed in blower and compressor applications

Specifications

No published specifications for this item yet.

Questions about this item

How is the two-piece neoprene sleeve with retaining ring installed on the 8N coupling, and what step is often missed?

The sleeve halves wrap around the hub teeth and the retaining ring snaps into the groove to lock them; the step often missed is confirming the ring is fully seated before torquing the hub bolts.

What maintenance or replacement will the neoprene insert need during its service life?

Inspect the neoprene for cracking, hardening or tooth wear at each scheduled shutdown; replace the insert when the material shows degradation or when vibration exceeds normal levels.

At 4,500 RPM continuous duty, which limit appears first — torque, temperature or misalignment capacity?

The 200 °F maximum operating temperature is typically the first limit reached under sustained high-speed operation, especially if ambient heat or misalignment adds to internal hysteresis heating.

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