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Hytrel coupling insert, two-piece sleeve design, inch dimensions

Tb Wood'S

Tb Wood'S 7HS Sure-Flex Sleeve Coupling Insert Hytrel

SKU CH-NNBK-X4NN5

Transmits up to 2,875 in-lb at 5,250 RPM using a two-piece Hytrel sleeve rated to 250 °F

  • Hytrel material handles 250 °F operating temperature
  • 20,000 in-lb/rad torsional stiffness ensures precise torque transmission
  • 6 hp at 100 RPM powers compressors and conveyors
  • 2,875 in-lb maximum torque suits electric motors and pumps
  • New 2-piece insert construction simplifies installation and maintenance

Industrial Coupling Insert for Power Transmission

The TB Woods 7HS Sure-Flex sleeve coupling insert connects rotating shafts in compressors, conveyors, electric motors, fans, blowers, mixers and pumps. Its Hytrel construction handles a maximum torque of 875 in-lb and a top speed of 5,250 RPM. The two-piece design simplifies installation and replacement in inch-system machinery.

Two-Piece Design Eases Assembly and Alignment

The insert fits Sure-Flex Plus coupling hubs of size 7 with an outside diameter of 4 11/32 in and a width of 2 3/16 in. It tolerates angular misalignment of 0.25 degrees and parallel offset of 0.012 in, reducing stress on connected bearings and seals. No lubrication is required during operation.

Hytrel Material Sustains 250 Degrees F Under Load

Torsional stiffness of 20,000 in-lb/rad delivers predictable response at a rated 4.6 hp at 100 RPM. The elastomer resists heat buildup during continuous duty up to 250 degrees F, making it unsuitable for environments exceeding that temperature or for applications demanding higher torque or speed ratings.

Highlights

  • Hytrel material handles 250 °F operating temperature
  • 20,000 in-lb/rad torsional stiffness ensures precise torque transmission
  • 6 hp at 100 RPM powers compressors and conveyors
  • 2,875 in-lb maximum torque suits electric motors and pumps
  • New 2-piece insert construction simplifies installation and maintenance

Specifications

No published specifications for this item yet.

Questions about this item

Will the 250 °F temperature limit be reached first during continuous operation?

The insert is rated for a maximum operating temperature of 250 °F. Under sustained load the heat generated by hysteresis in the Hytrel material will approach this limit before the 5,250 RPM speed ceiling becomes a constraint.

How much heat and noise should I expect when the coupling runs all day at 100 RPM?

At 100 RPM the coupling transmits 4.6 hp with a torsional stiffness of 20,000 in-lb/rad. The Hytrel insert damps vibration, so audible noise stays low, while steady-state heat rise is governed by the 250 °F maximum temperature rating.

What shaft hardware must I already have to install this size-7 insert?

This insert fits Sure-Flex size-7 flanges with an outside diameter of 4 11/32 in and an insert width of 2 3/16 in. You need the matching two-piece flanges and standard fasteners to complete the coupling assembly.

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