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Grey cast iron coupling flange with 7/8 inch keyed bore

Tb Wood'S

Tb Wood'S 6J78 Sure-Flex Sleeve Coupling Flange 6J Bore 7/8 in

SKU CH-CF55-77682

Connects shafts up to 6,000 RPM and 585 in-lb torque with a 7/8 in bore

  • Precise 7/8 in bore fits shafts accurately
  • Cast-iron flange hub withstands 585 in-lb torque
  • Rated for 6 000 RPM high-speed drives
  • +0.0005/+0.0015 in tolerance ensures alignment
  • 1 5/16 in bore length supports secure mounting

Coupling Flange for Industrial Drives

The Tb Wood'S 6J78 Sure-Flex sleeve coupling flange fits 6J-sized hubs with a 7/8 inch round keyed bore. It connects motor shafts to driven equipment in compressors, conveyors, motors and pumps where reliable torque transfer is required.

Cast Iron Hub Handles 585 in-lb Torque

The cast iron flange hub transmits up to 585 in-lb at speeds up to 6,000 RPM. Its 2 1/2 inch hub diameter and 9/16 inch body length provide a rigid mounting face that resists distortion under cyclic loading.

Keyed Bore with Tight Tolerance Simplifies Alignment

The 7/8 inch bore is machined to a tolerance of +0.0005 in / +0.0015 in for a precise interference fit on standard shafting. The 1 5/16 inch length through bore ensures full key engagement, reducing fretting and easing installation on existing equipment.

Highlights

  • Precise 7/8 in bore fits shafts accurately
  • Cast-iron flange hub withstands 585 in-lb torque
  • Rated for 6 000 RPM high-speed drives
  • +0.0005/+0.0015 in tolerance ensures alignment
  • 1 5/16 in bore length supports secure mounting

Specifications

No published specifications for this item yet.

Questions about this item

Will the cast-iron hub or the keyed bore need periodic inspection or replacement?

The cast-iron flange hub and round keyed bore are solid components with no wearable inserts; only the separate Sure-Flex sleeve element, which is not included with this flange, requires periodic replacement.

What speed or torque limit will be reached first during continuous operation?

The flange is rated for 6,000 RPM maximum speed and 585 in-lb maximum torque; whichever limit is reached first in your drive determines the operating ceiling.

How much heat or noise does the flange generate when running all day?

The bare cast-iron flange produces negligible heat and noise; any measurable temperature rise or sound comes from the flexible sleeve element and the driven equipment, not from this hub.

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