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Metal coupling flange with 1/2 inch round keyed bore, carbon steel hub, 2 1/2 inch outside diameter

Tb Wood'S

Tb Wood'S 4J12 Sure-Flex Sleeve Coupling Flange 4J Bore 1/2 in

SKU CH-9EYS-KQT83

Sleeve coupling flange for 1/2 in bore handles up to 156 in-lb torque at 7,600 RPM

  • TypeCouplings, Collars & Adapters
  • Handles up to 156 in-lb torque for reliable power transfer
  • Operates at speeds up to 7,600 RPM in demanding applications
  • Precision bore tolerance of +0.0005 to +0.0015 in ensures secure shaft fit
  • Carbon steel hub construction withstands heavy industrial use
  • Compatible with compressors, conveyors, motors and pumps

Coupling Flange for 4J Series

The Tb Wood'S 4J12 is a flange hub designed for Sure-Flex sleeve couplings in size 4. It fits a 1/2 inch round keyed bore and serves compressors, conveyors, motors and pumps in power transmission systems.

Keyed Bore with Tight Tolerance

The 1/2 inch bore uses a +0.0005 to +0.0015 inch tolerance for a secure fit on the shaft. A standard keyway aligns the hub. Carbon steel construction supports the rated torque. No bushing is required for this flange type.

Rated for Continuous 7600 RPM Operation

Maximum speed reaches 7,600 RPM with a torque limit of 156 in-lb. The 2 1/2 inch outside diameter and 1 5/8 inch hub diameter handle sustained loads in the listed applications. Hub body length is 27/64 inch and length through bore is 55/64 inch.

Highlights

  • Handles up to 156 in-lb torque for reliable power transfer
  • Operates at speeds up to 7,600 RPM in demanding applications
  • Precision bore tolerance of +0.0005 to +0.0015 in ensures secure shaft fit
  • Carbon steel hub construction withstands heavy industrial use
  • Compatible with compressors, conveyors, motors and pumps

Specifications

TypeCouplings, Collars & Adapters

Questions about this item

How do I confirm the flange is running correctly after installation?

Verify the shaft spins smoothly up to 7 600 RPM without vibration and that transmitted torque stays within the 156 in-lb rating.

What comes with the 4J12 flange and what must I source separately?

The package includes the carbon-steel flange hub with 1/2 in round keyed bore; the matching sleeve element and any key stock are not included.

Which bore size should I select for a 1/2 inch shaft?

Choose the 4J12 model — its bore diameter is 1/2 in with a tolerance of +0.0005 / +0.0015 in for a precise keyed fit.

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