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Carbon steel jaw coupling hub, 42 mm bore, 85 mm diameter, 107 mm length, set screw locking

Lovejoy

Lovejoy L110 42 mm Jaw Coupling Hub

SKU CH-YMC4-6XMW8

Metric jaw coupling hub with 42 mm bore, 12 mm keyway and set-screw locking for 5,000 RPM service

  • 42 mm bore fits standard metric shafts
  • 85 mm outside diameter saves installation space
  • 3 hp at 100 rpm with Buna-N spider
  • 6 hp at 100 rpm with Hytrel spider
  • 5,000 rpm maximum speed for high-speed drives

Application & fit

This Lovejoy L110 jaw coupling hub fits a 42 mm round shaft with a 12 mm wide by 3.3 mm deep keyway and uses a set-screw lock. It is built for metric drive lines in industrial machinery where a straight-jaw, carbon-steel hub is specified. Buyers needing a different bore size, a clamp-style hub or a non-metallic spider should select another part.

Sustained load behaviour

The hub transmits up to 1.3 hp at 100 RPM with a Buna-N spider, 2 hp with a urethane spider or 3.6 hp with a Hytrel spider, and is rated for 5,000 RPM maximum speed. These figures reflect continuous duty rather than peak torque spikes, so the spider material must match the application’s vibration and temperature profile.

Installation & common issues

Slide the hub onto the shaft, engage the key in the 12 mm keyway and tighten the set screw against the flat. The 85 mm outside diameter and 107 mm overall length must clear adjacent components. A frequent problem is over-tightening the set screw on hardened shafts, which can distort the hub or mar the shaft and cause run-out.

Highlights

  • 42 mm bore fits standard metric shafts
  • 85 mm outside diameter saves installation space
  • 3 hp at 100 rpm with Buna-N spider
  • 6 hp at 100 rpm with Hytrel spider
  • 5,000 rpm maximum speed for high-speed drives

Specifications

No published specifications for this item yet.

Questions about this item

How much heat or power loss should I expect when the L110 hub runs continuously at 5,000 RPM?

The hub is rated for a maximum speed of 5,000 RPM. Power transmission capacity depends on the spider material: 1.3 hp at 100 RPM with Buna-N, 2 hp with Urethane, and 3.6 hp with Hytrel.

What shaft size and keyway dimensions are required to mount this 42 mm bore hub?

This hub fits a 42 mm round shaft with a 12 mm wide by 3.3 mm deep keyway. It uses a set screw locking type for shaft fixation.

Will the L110 hub work with my existing L110N or L110U center elements?

Yes, this hub is compatible with center element part numbers L110H, L110N, and L110U. The straight jaw profile ensures proper engagement with these elements.

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