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Cast iron jaw coupling hub L190 with 1-3/8 inch bore and set screw

Lovejoy

Lovejoy L190 jaw coupling hub, 1-3/8 in bore, cast iron

SKU CH-XVXS-4SS2J

Cast-iron jaw coupling hub with 1-3/8 in bore and set-screw locking, rated to 5,000 RPM and compatible with Buna-N, urethane or Hytrel spiders

  • L190 cast-iron hub handles up to 7.4 hp at 100 RPM
  • 5 000 RPM maximum speed suits high-speed drives
  • 1-3/8 in bore with 5/16 in keyway fits standard shafts
  • Set-screw locking secures hub without additional hardware
  • Accepts Buna-N, urethane or Hytrel spider elements

Coupling hub for 1-3/8 in shafts

This Lovejoy L190 jaw coupling hub fits a 1-3/8 inch round bore with a 5/16 inch keyway and 5/32 inch keyway depth. It uses a set-screw locking method and a straight jaw profile. The hub is made from cast iron and suits general industrial power-transmission applications where inch-series shafting is used.

Speed and spider choice define torque limits

The hub is rated to a maximum speed of 5,000 RPM. Torque capacity depends on the centre element selected: a Buna-N spider delivers 2.7 hp at 100 RPM, urethane gives 4.1 hp and Hytrel provides 7.4 hp. The hub itself does not set a single torque ceiling; the designer must match the spider material to the application load and speed.

1-3/8 inch bore with keyway is the fit criterion

The bore diameter, keyway width and keyway depth together decide whether this hub matches the driven shaft. If the shaft differs in any of those three dimensions, the hub cannot be used without machining. Buyers who need a different bore size, a metric bore or a clamping-style lock must select another hub.

Highlights

  • L190 cast-iron hub handles up to 7.4 hp at 100 RPM
  • 5 000 RPM maximum speed suits high-speed drives
  • 1-3/8 in bore with 5/16 in keyway fits standard shafts
  • Set-screw locking secures hub without additional hardware
  • Accepts Buna-N, urethane or Hytrel spider elements

Specifications

No published specifications for this item yet.

Questions about this item

Which L190 hub should I pick for a 1-3/8 in shaft?

This hub is machined for a 1-3/8 in round bore with a 5/16 in keyway and set-screw locking, matching the stated bore diameter and keyway dimensions.

What does the 2.7 hp at 100 rpm rating mean in actual use?

With a Buna-N spider the hub transmits 2.7 hp at 100 rpm; a Urethane spider raises it to 4.1 hp and a Hytrel spider to 7.4 hp at the same speed, all within the 5,000 rpm limit.

How does the straight-jaw profile limit spider choice?

The straight jaw profile accepts only L190N (Buna-N), L190U (Urethane) or L190H (Hytrel) center elements, so spider material directly sets the torque capacity.

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