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Cast iron coupling flange with 1 3/8 inch keyed bore

Tb Wood'S

Tb Wood'S 6J138 Sure-Flex Sleeve Coupling Flange

SKU CH-4X4A-VNM8H

A cast-iron flange hub for sleeve couplings, rated to 6,000 RPM and 585 in-lb torque with a 1-3/8 in bore

  • Handles up to 585 in-lb torque
  • Rated for 6,000 RPM maximum speed
  • 1-3/8 in bore with +.0005/+.0015 in tolerance
  • Cast iron hub for durable power transmission
  • Fits compressors, conveyors, motors and pumps

Sure-Flex Sleeve Coupling Flange

The Tb Wood'S 6J138 is a cast-iron flange hub designed for Size 6 Sure-Flex couplings. It connects a 1-3/8 inch round keyed shaft to the coupling sleeve in power-transmission assemblies. The hub suits compressors, conveyors, motors and pumps running at speeds up to 6,000 RPM and torque up to 585 in-lb. Bore tolerance is held to +0.0005 in / +0.0015 in for a precise interference fit.

Maintenance crews and OEM builders

Maintenance crews and OEM builders who need a replacement or new flange for an existing Size 6 Sure-Flex coupling will find the correct bore and hub dimensions here. Shops that require a different coupling size, a non-keyed bore, a clamp-style hub or a material other than cast iron should look elsewhere because this flange is fixed to the listed specifications.

Continuous operation at rated limits

Under sustained load the cast-iron hub transmits the full 585 in-lb torque rating without the temperature spikes that can affect elastomeric sleeves in high-cycle applications. The 4 inch outside diameter and 9/16 inch body length keep the rotating mass compact, helping the assembly stay balanced at the maximum 6,000 RPM rating during extended duty cycles.

Highlights

  • Handles up to 585 in-lb torque
  • Rated for 6,000 RPM maximum speed
  • 1-3/8 in bore with +.0005/+.0015 in tolerance
  • Cast iron hub for durable power transmission
  • Fits compressors, conveyors, motors and pumps

Specifications

No published specifications for this item yet.

Questions about this item

What shaft diameter does the 1-3/8 in bore of the 6J138 flange accept?

The bore accepts a shaft of 1 3/8 in with a tolerance of + 0.0005 in / + 0.0015 in.

Will the cast-iron 6J flange mate with an existing EPDM or Neoprene sleeve rated for 6,000 RPM and 585 in-lb?

Yes, the 6J flange is designed for Sure-Flex sleeves of coupling size 6 rated at 6,000 RPM and 585 in-lb.

How can I confirm the 6J138 flange is seated correctly after installation?

Verify the key seats fully in the keyway, the flange face sits flush against the sleeve, and the hub runs true at the 4 in outside diameter.

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