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Cast iron sleeve coupling flange, 2-1/8 inch bore, keyed hub, 5 29/64 inch outside diameter

Tb Wood'S

Tb Wood'S 8S218 Sleeve Coupling Flange 8S Bore 2-1/8 in

SKU CH-Z1R8-J5GHN

Cast-iron sleeve coupling flange for 2-1/8 in round keyed bores, rated to 4,500 RPM and 1,475 in-lb torque

  • Precision bore tolerance + .0005 / + .0015 in ensures accurate shaft alignment
  • Cast iron hub delivers high strength for compressors conveyors motors pumps
  • Maximum torque 1,475 in-lb handles demanding power transmission loads
  • Rated to 4,500 RPM supports high-speed rotating equipment
  • 2-1/8 in round keyed bore fits standard inch-dimension shafts

Sleeve Coupling Flange 8S 2-1/8 in Bore

The Tb Wood'S 8S218 is a cast-iron flange hub built for sleeve coupling assemblies in power-transmission systems. It suits maintenance teams and OEMs fitting compressors, conveyors, motors or pumps that require a 2-1/8 inch round keyed bore.

Sustained Load Behaviour 4500 RPM 1475 in-lb

Rated for continuous operation at 4,500 RPM with a maximum torque of 1,475 in-lb, the flange transmits steady rotational force without the thermal spikes seen in short-burst cycling. The cast-iron hub maintains dimensional stability under prolonged duty cycles in industrial drivelines.

Bore Tolerance +0.0005 / +0.0015 in

The critical fit specification is a bore tolerance of +0.0005 to +0.0015 inch, ensuring precise keyed engagement on 2-1/8 inch shafts. Buyers needing a different bore diameter, a clamp-style hub or a metric tolerance range cannot use this flange.

Highlights

  • Precision bore tolerance + .0005 / + .0015 in ensures accurate shaft alignment
  • Cast iron hub delivers high strength for compressors conveyors motors pumps
  • Maximum torque 1,475 in-lb handles demanding power transmission loads
  • Rated to 4,500 RPM supports high-speed rotating equipment
  • 2-1/8 in round keyed bore fits standard inch-dimension shafts

Specifications

No published specifications for this item yet.

Questions about this item

How much heat and noise does the 8S flange generate when running continuously at 4,500 RPM?

The flange itself has no moving parts and produces no measurable heat or noise; any sound or temperature rise comes from the driven equipment it connects to.

Which coupling sleeve must I already own for this 8S flange with a 2-1/8 in bore to work?

It requires a matching TB Wood's 8S Sure-Flex sleeve; the flange alone cannot transmit torque without that elastomeric element.

Will the 3 1/4 in hub diameter and 2 3/32 in length through bore align with the shaft on my older compressor?

Yes, if the compressor shaft is 2-1/8 in with a standard keyway and the hub tolerance of +.0005 to +.0015 in matches the shaft fit.

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