We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black neoprene sleeve coupling insert with split-ring design

Tb Wood'S

Tb Wood'S 6JNS Sure-Flex Sleeve Coupling Insert Neoprene

SKU CH-383X-7F3HB

Neoprene sleeve coupling insert handles 585 in-lb torque at 6,000 RPM for blowers, compressors, conveyors, mixers, motors and pumps

  • Neoprene insert withstands 200 °F operating temperatures
  • Handles 585 in-lb maximum torque for demanding drives
  • 6,000 RPM speed rating suits high-speed equipment
  • 1-piece split design simplifies installation and maintenance
  • 93 hp at 100 RPM delivers reliable power transfer

Purpose-built insert for Size-6 Sure-Flex couplings

The neoprene sleeve replaces the flexible element inside a Size 6 coupling, transmitting up to 585 in-lb of torque at speeds up to 6,000 RPM. It handles 0.93 hp at 100 RPM and operates continuously to 200 °F. The one-piece split construction simplifies installation on existing shafts without full disassembly.

Fit for maintenance teams standardising on Tb

The insert suits blowers, compressors, conveyors, mixers, motors and pumps that tolerate 1° angular and 0.015 in parallel misalignment. Operations needing higher torque capacity, different misalignment limits or non-neoprene materials should select an alternative insert matched to those requirements.

Neoprene material rated to 200 °F continuous service

The elastomer choice determines temperature resistance, oil compatibility and damping characteristics. Verify that the operating environment stays within the 200 °F limit and that neoprene meets the chemical exposure profile before specifying this insert.

Highlights

  • Neoprene insert withstands 200 °F operating temperatures
  • Handles 585 in-lb maximum torque for demanding drives
  • 6,000 RPM speed rating suits high-speed equipment
  • 1-piece split design simplifies installation and maintenance
  • 93 hp at 100 RPM delivers reliable power transfer

Specifications

No published specifications for this item yet.

Questions about this item

What shaft spacing does the 3 3/4 in outside diameter and 1 7/8 in insert width require?

The coupling fits a 3 3/4 in outside diameter and 1 7/8 in insert width; allow the rated parallel misalignment of 0.015 in and angular misalignment of 1 degree when aligning shafts.

How is the new 1-piece split neoprene insert installed, and what step is often missed?

Spread the split insert over the coupling hubs, seat it fully in the grooves, then torque the hub set screws to the manufacturer's specification — skipping the torque step lets the insert walk out under load.

When should the neoprene sleeve insert be replaced?

Replace the insert when cracks appear, the material hardens beyond the 200 °F rating, or vibration exceeds the 1 degree angular or 0.015 in parallel misalignment limits.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.