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A carbon steel flange hub with a round keyed bore, 3/4 inch diameter, 2 1/16 inch outside diameter

Tb Wood'S

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

SKU CH-FS1V-NH5JB

Connects shafts in compressors, conveyors, motors and pumps with a 3/4 inch bore and 78 in-lb torque capacity

  • Handles up to 9,200 RPM for high-speed drives
  • Transmits 78 in-lb torque to power equipment reliably
  • Carbon steel hub resists wear in tough industrial use
  • Precision 3/4 in bore with tight tolerance fits shafts securely
  • Flange hub design simplifies mounting on compressors and conveyors

Industrial Power Transmission Flange

The TB WOODS 3J34 Sure-Flex sleeve coupling flange connects shafts in compressors, conveyors, motors and pumps. Its carbon steel hub accepts a 3/4 inch round keyed bore with a tolerance of +.0005 to +.0015 inch for secure power transmission.

Speed and Torque Limits

Maximum operating speed reaches 9,200 RPM while the assembly handles up to 78 in-lb of torque. The flange hub measures 13/32 inch body length and 1 1/2 inch diameter within a 2 1/16 inch outside diameter.

Direct Mount Design

No separate bushing is required for installation, reducing part count and alignment steps. The 51/64 inch length through bore provides consistent engagement for the listed industrial applications.

Highlights

  • Handles up to 9,200 RPM for high-speed drives
  • Transmits 78 in-lb torque to power equipment reliably
  • Carbon steel hub resists wear in tough industrial use
  • Precision 3/4 in bore with tight tolerance fits shafts securely
  • Flange hub design simplifies mounting on compressors and conveyors

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 3J coupling flange on a 3/4 inch shaft, and what step is commonly missed?

Press the flange onto the shaft to the 51/64 inch bore depth, then tighten the set screw over the keyway; the step often missed is verifying the +.0005 to +.0015 inch bore tolerance before locking it down.

What maintenance or replacement will the 3J flange need over time?

Inspect the keyway and set screw for wear during scheduled downtime; replace the flange if the hub shows fretting or the bore exceeds the original tolerance window.

What limit appears first when the 3J flange runs continuously at high speed?

The 9,200 RPM maximum speed rating is the first hard limit; sustained operation above it risks hub distortion before the 78 in-lb torque ceiling is reached.

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