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Cast iron jaw coupling hub L190 with 1 inch bore and keyway

Lovejoy

Lovejoy L1901 Jaw Coupling Hub L190 Cast Iron 1 in Bore

SKU CH-4757-81N6W

Cast iron jaw coupling hub with 1 inch bore and keyway transmits up to 7.4 hp at 100 rpm with a Hytrel spider

  • Cast iron hub withstands 5000 RPM
  • 1 inch bore with keyway fits standard shafts
  • Set screw locking secures hub without extra hardware
  • Three spider options deliver 2.7 to 7.4 hp at 100 RPM
  • L190 size matches L190H, L190N, L190U centre elements

Cast Iron Hub for L190 Couplings

This Lovejoy L1901 jaw coupling hub is machined from cast iron for use in power-transmission assemblies. It accepts a 1 inch round bore with a standard keyway and secures to the shaft with a set-screw locking method. The hub is designed to pair with L190-series centre elements in inch-dimensioned machinery.

Suited for Inch-Series Shaft Connections

The hub fits builders working with 1 inch shafts who need a straight-jaw profile and set-screw retention. It is not intended for metric bores, clamp-style or keyless locking methods, or for coupling sizes other than L190. Applications requiring a different bore diameter or a split-hub design will need an alternative component.

Direct Set-Screw Installation

Installation consists of sliding the hub onto the keyed shaft, aligning the keyway, and tightening the set screw against the key. The straight jaw profile simplifies spider insertion during assembly. The most common issue is insufficient set-screw torque, which can allow the hub to rotate on the shaft under load.

Highlights

  • Cast iron hub withstands 5000 RPM
  • 1 inch bore with keyway fits standard shafts
  • Set screw locking secures hub without extra hardware
  • Three spider options deliver 2.7 to 7.4 hp at 100 RPM
  • L190 size matches L190H, L190N, L190U centre elements

Specifications

No published specifications for this item yet.

Questions about this item

Do I need to buy the L190 spider separately to complete the coupling?

Yes, the hub requires a compatible L190H, L190N or L190U center element which is sold separately.

Will this hub fit on a motor shaft that already has a 1/4 inch keyway?

The hub has a 1 inch bore with a 1/4 inch wide by 1/8 inch deep keyway that matches that shaft.

How can I confirm the hub is running within its rated limits after installation?

Verify the shaft speed does not exceed 5,000 RPM and that the transmitted load stays below the spider's horsepower rating at 100 RPM.

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