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Cast iron spacer hub with 7/8 inch keyed bore

Tb Wood'S

Tb Wood'S 6SCH78 Sure-Flex Sleeve Coupling Spacer Hub

SKU CH-5ZZC-DVJNS

A 6SC spacer hub with 7/8 inch bore for compressors, conveyors, motors and pumps rated to 6000 RPM and 585 in-lb torque

  • Spacer hub design simplifies shaft alignment
  • Cast iron construction withstands 585 in-lb torque rating
  • 7/8 inch round keyed bore fits standard shafts
  • 6,000 RPM maximum speed suits high-speed drives
  • Precision bore tolerance of +.0005/+.0015 in ensures secure fit

Spacer Hub for 6SC Couplings

The Tb Wood'S 6SCH78 is a spacer hub designed for Sure-Flex sleeve couplings in size 6SC. It fits round keyed shafts with a 7/8 inch bore diameter and is rated for up to 6,000 RPM and 585 in-lb of torque. The hub body is cast iron with a 2 1/2 inch outside diameter and a 1 7/32 inch length through bore.

Suits Shaft Alignment on Pumps and Compressors

This spacer hub serves maintenance teams aligning motors, pumps, compressors or conveyors that use the 6SC coupling system. It is not for applications requiring a different coupling size, a larger bore, higher torque capacity or a metric bore tolerance. Buyers needing a complete coupling assembly or an elastomeric sleeve should look elsewhere.

Press Fit onto Keyed Shafts with Standard Tooling

Installation consists of pressing the hub onto a prepared shaft within the +0.0005 in / +0.0015 in bore tolerance and securing the key. The cast iron hub machines cleanly if reboring is required. The most common issue is ignoring the bore tolerance, which can cause fretting or hub walk-out under load.

Highlights

  • Spacer hub design simplifies shaft alignment
  • Cast iron construction withstands 585 in-lb torque rating
  • 7/8 inch round keyed bore fits standard shafts
  • 6,000 RPM maximum speed suits high-speed drives
  • Precision bore tolerance of +.0005/+.0015 in ensures secure fit

Specifications

No published specifications for this item yet.

Questions about this item

What shaft diameter does the 7/8 in bore of this spacer hub fit?

The round keyed bore measures 7/8 in with a tolerance of +0.0005 in to +0.0015 in, so it fits a shaft of that nominal diameter.

Will the cast iron hub rated for 585 in-lb torque and 6,000 RPM work with an older motor running at lower speeds?

Yes, the hub handles up to 585 in-lb and 6,000 RPM, so it is suitable for older motors operating within those limits.

How can I confirm the coupling is installed correctly after setup?

Verify the hub seats fully on the shaft, the key engages the keyway, and the assembly runs without vibration up to the 6,000 RPM rating.

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