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Carbon steel L090 jaw coupling hub with 3/4 inch bore and keyway

Lovejoy

Lovejoy L090 Jaw Coupling Hub 3/4 in Bore

SKU CH-6NGV-NAMDB

Jaw coupling hub with 3/4 in bore, 2 7/64 in outside diameter and 9,000 RPM maximum speed for power transmission applications

  • Carbon-steel hub rated for 9,000 RPM continuous operation
  • 3/4 in bore with 3/16 in keyway fits standard shafts
  • Set-screw locking secures hub without additional hardware
  • Buna-N spider delivers 0.23 hp at 100 RPM
  • Compatible with L090H, L090N and L090U center elements

Hub Specifications

The Lovejoy L090 jaw coupling hub is a carbon-steel power-transmission component with a 3/4 inch round bore and keyway. It uses a set-screw locking method and a straight jaw profile to connect driving and driven shafts in industrial machinery. The hub accepts L090H, L090N and L090U center elements and is rated for speeds up to 9,000 RPM.

Target Applications

This hub suits maintenance teams replacing a worn L090 coupling on existing equipment where the shaft diameter matches the 3/4 inch bore and keyway dimensions. It is not for buyers who need a different bore size, a clamp-style hub or a coupling rated for higher torque than the 0.64 hp at 100 RPM Hytrel limit.

Installation Notes

Mount the hub by aligning the key in the 3/16 inch wide by 3/32 inch deep keyway and tightening the set screw against the shaft flat. The most common issue is insufficient set-screw torque allowing the hub to slip under load, so verify the screw is fully seated before installing the spider element.

How it compares

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

Price $8.99
Cheaper than about 90% of the 693 comparable items (median $35.99).

Specifications

No published specifications for this item yet.

Questions about this item

What size keyway does the L090 hub need on my shaft?

The hub is machined for a 3/16 in keyway width and a 3/32 in keyway depth on a 3/4 in bore.

Will the L090 hub run at the same 9,000 RPM limit if I keep my older Buna-N spider?

Yes, the 9,000 RPM maximum speed applies to the hub itself; the Buna-N spider is rated at 0.23 hp at 100 RPM.

How can I confirm the hub is seated correctly after tightening the set screw?

Verify the shaft is flush with the hub face and the set screw sits firmly on the keyway flat.

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