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Carbon steel L090 jaw coupling hub with 12 mm bore and keyway

Lovejoy

Lovejoy L-Jaw Coupling Hub L090 12 mm Bore

SKU CH-PSN9-G5HC0

Jaw coupling hub with 12 mm bore and 54 mm diameter, rated to 9,000 RPM

  • 12 mm bore fits standard shafts
  • Carbon steel hub handles 9 000 RPM
  • Buna-N spider delivers 0.23 hp at 100 RPM
  • Urethane spider provides 0.35 hp at 100 RPM
  • Hytrel spider supports 0.64 hp at 100 RPM

L090 Jaw Coupling Hub

The Lovejoy L090 hub is a carbon-steel coupling component designed for metric shafting with a 12 mm round bore and standard 4 mm keyway. It uses a set-screw locking method and straight jaw profile to connect driving and driven equipment in general power-transmission applications.

Suits metric shafts needing 12 mm bore

This hub suits installations that require a 54 mm outside diameter and 54 mm overall length at speeds up to 9 000 RPM. It is not for buyers who need a different bore diameter, a clamp-style or keyless locking method, or a spider element with a higher torque rating than the listed Buna-N, Urethane or Hytrel options.

Verify shaft diameter and keyway before ordering

Confirm the shaft measures 12 mm and provides a 4 mm wide by 1.8 mm deep keyway to match the hub bore. Ensure the centre element part number L090H, L090N or L090U matches the spider material required for the application horsepower at 100 RPM.

Highlights

  • 12 mm bore fits standard shafts
  • Carbon steel hub handles 9 000 RPM
  • Buna-N spider delivers 0.23 hp at 100 RPM
  • Urethane spider provides 0.35 hp at 100 RPM
  • Hytrel spider supports 0.64 hp at 100 RPM

Specifications

No published specifications for this item yet.

Questions about this item

What shaft diameter does the 12 mm bore fit?

The hub has a 12 mm round bore with a 4 mm keyway width and 1.8 mm keyway depth, so it fits a 12 mm shaft with a matching keyway.

Will the L090 hub work with existing L090N Buna-N spiders rated at 0.23 hp at 100 RPM?

Yes, the hub is compatible with L090N Buna-N, L090U urethane and L090H Hytrel centre elements, so your existing Buna-N spider rated at 0.23 hp at 100 RPM will work.

How can I confirm the coupling runs within its 9,000 RPM limit after installation?

Use a tachometer on the driven shaft to verify the operating speed stays at or below 9,000 RPM during normal operation.

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