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Aluminum jaw coupling hub, 1-1/8 inch bore, straight jaw profile, set screw locking

Lovejoy

Lovejoy AL100 Jaw Coupling Hub Aluminum 1-1/8 in

SKU CH-77C4-YMHW2

Aluminium jaw coupling hub with a 1-1/8 in round bore and keyway for L100 series elements

  • Aluminum hub resists corrosion and reduces weight
  • 7,000 RPM maximum speed suits high-speed drives
  • 1-1/8 in bore with 1/4 in keyway fits standard shafts
  • Set-screw locking secures hub without additional hardware
  • Compatible with L100 Buna-N, Hytrel and urethane spiders

Application fit

This aluminum jaw coupling hub fits a 1-1/8 inch round bore with a standard keyway and set-screw locking. It suits machinery that requires a straight-jaw L100 hub for connecting driver and driven shafts. It is not for applications needing a different bore size, a clamp-style hub, or a tapered bore.

Thermals noise power

The hub itself generates no heat or noise and draws no power; it transmits torque mechanically. At the rated 7,000 RPM maximum speed it can handle 0.1 hp with a urethane spider, 0.66 hp with Buna-N, and 1.8 hp with Hytrel at 100 RPM. It is not for drives exceeding the stated speed or horsepower limits.

Bundled impact

No spider element, hardware, or software is included in the package. The hub accepts L100H, L100N, or L100U center elements, which must be sourced separately. Buyers who need a complete coupling kit or a pre-assembled unit should look elsewhere.

Highlights

  • Aluminum hub resists corrosion and reduces weight
  • 7,000 RPM maximum speed suits high-speed drives
  • 1-1/8 in bore with 1/4 in keyway fits standard shafts
  • Set-screw locking secures hub without additional hardware
  • Compatible with L100 Buna-N, Hytrel and urethane spiders

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the set-screw on the 1-1/8 in bore and what step is often missed?

Slide the hub onto the shaft, align the key with the 1/4 in wide keyway, then tighten the set-screw onto the key — not the shaft — to prevent loosening under vibration.

Which spider material will wear first and need replacement?

The urethane spider (L100U) has the lowest power rating at .1 hp @ 100 RPM, so it will degrade before Buna-N or Hytrel elements under the same load.

At what speed does the aluminum hub reach its balance limit?

The hub is rated to 7,000 RPM; sustained operation above this speed risks vibration and premature jaw or spider failure.

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