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Carbon steel flange coupling hub, 2.5 inch diameter, 3/4 inch bore

Tb Wood'S

Tb Wood'S 4J34 Sure-Flex Sleeve Coupling Flange 3/4 in Bore

SKU CH-MZND-721Z5

Connects shafts on compressors, conveyors, motors and pumps with a 3/4 in bore flange rated for 7,600 RPM and 156 in-lb torque

  • Handles demanding drives with 156 in-lb torque capacity
  • Operates reliably at speeds up to 7,600 RPM
  • Fits 3/4 in shafts with +.0005/+.0015 in bore tolerance
  • Carbon steel hub resists wear in compressors, conveyors, motors and pumps
  • Compact 2-1/2 in OD saves space in tight machine layouts

Coupling Flange for 3/4 in Shafts

The Tb Wood'S 4J34 Sure-Flex sleeve coupling flange connects a 3/4 inch round keyed shaft in power transmission assemblies. It is rated for a maximum speed of 7,600 RPM and a maximum torque of 156 in-lb. The carbon steel hub measures 1 5/8 inches in diameter with an overall outside diameter of 2 1/2 inches.

Industrial Maintenance and OEM Builds

Maintenance teams repairing compressors, conveyors, motors or pumps will find the 4J size matches existing Sure-Flex installations. Shops that require a different bore diameter, a clamp-style hub or a metric interface should select another flange.

Steady-State Torque Transmission

Under continuous load the flange transmits up to 156 in-lb at speeds up to 7,600 RPM within the stated bore tolerance of +0.0005 to +0.0015 inches. The 55/64 inch length through bore and 27/64 inch hub body length maintain alignment during sustained operation.

How it compares

Measured against everything we stock in Bearings, Belts & Drive Components, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 80% of the 693 comparable items (median $35.99).

Specifications

No published specifications for this item yet.

Questions about this item

What size shaft does the 3/4 in bore flange fit?

The flange accepts a 3/4 in round keyed shaft with a bore tolerance of +0.0005 in to +0.0015 in.

Will the 4J flange mesh with an existing 4J sleeve on my pump?

Yes, the Coupling Size 4 flange is made to pair with any 4J sleeve in the Sure-Flex range.

How can I verify the hub runs true after installation?

Check that the hub body length of 27/64 in seats fully on the shaft and that the assembly spins freely up to 7 600 RPM without vibration.

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