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Cast iron flange coupling hub, 2 1/8 inch bore, 6 11/32 inch outer diameter

Tb Wood'S

Tb Wood'S 9S218 Sure-Flex Sleeve Coupling Flange, 9S, 2 1/8 in Bore

SKU CH-XH0C-BRPS2

Sleeve coupling flange rated for 3,750 RPM and 2,340 in-lb torque with a 2 1/8 in bore

  • Handles high-torque drives up to 2,340 in-lb
  • Runs at speeds up to 3,750 RPM for demanding applications
  • Cast-iron hub resists wear in harsh environments
  • Precision bore tolerance of +0.0005 to +0.0020 in ensures secure fit
  • Fits 2 1/8 in shafts for compressor, conveyor, motor and pump systems

Industrial Sleeve Coupling Flange

The TB WOODS 9S218 is a cast-iron flange hub designed for power-transmission systems. It suits compressors, conveyors, motors and pumps that require a round-keyed bore of 2 1/8 inches. The hub diameter measures 3 5/8 inches and the length through bore is 2 13/32 inches.

Upgrade From Worn Or Undersized Hubs

Replace a flange that shows keyway wear, corrosion or excessive run-out when the application runs at or near 3,750 RPM and 2,340 in-lb of torque. The jump is worth it when the existing hub bore tolerance exceeds the +0.0005 to +0.0020 inch range specified for this size 9 coupling.

Steady-State Operation At Rated Limits

Under continuous load the cast-iron body maintains alignment while transmitting up to 2,340 in-lb at 3,750 RPM. The 25/32 inch hub body length distributes stress across the keyed connection, limiting vibration buildup during extended duty cycles on compressors, conveyors, motors and pumps.

Highlights

  • Handles high-torque drives up to 2,340 in-lb
  • Runs at speeds up to 3,750 RPM for demanding applications
  • Cast-iron hub resists wear in harsh environments
  • Precision bore tolerance of +0.0005 to +0.0020 in ensures secure fit
  • Fits 2 1/8 in shafts for compressor, conveyor, motor and pump systems

Specifications

No published specifications for this item yet.

Questions about this item

What shaft diameter does the 2 1/8 in bore fit?

The bore diameter is 2 1/8 in with a tolerance of +0.0005 in to +0.0020 in for a round keyed shaft.

How is the flange secured to the shaft, and what step is often missed?

A keyway and set screw lock the hub; the step often missed is tightening the set screw over the key after alignment.

When should the elastomer sleeve be replaced?

Replace the sleeve when vibration increases, visible cracks appear, or after the maximum torque of 2,340 in-lb is exceeded.

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