We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Metal jaw coupling hub, 7/8 inch bore, straight jaws, carbon steel finish

Lovejoy

Lovejoy L110 Jaw Coupling Hub 7/8 in Bore

SKU CH-MD5H-Y83P0

Connects two shafts with a 7/8 in bore, 3 21/64 in outside diameter and 4 15/64 in overall length, rated to 5,000 RPM

  • Precision fit with 7/8 in bore and 3/16 in keyway
  • Carbon steel hub rated for 5 000 RPM max speed
  • Flexible power options: 1.3 hp Buna-N, 2 hp Urethane, 3.6 hp Hytrel at 100 RPM
  • Set-screw locking on straight-jaw profile for secure shaft connection
  • 3 21/64 in OD by 4 15/64 in overall length fits L110 elements

Jaw Coupling Hub L110 7/8 Inch Bore

The Lovejoy L110 jaw coupling hub fits a 7/8 inch round bore with a 3/16 inch keyway and 3/32 inch keyway depth. It uses a set-screw locking method and a straight jaw profile. This hub is intended for maintenance technicians and machinery builders who need a replacement or new drive component in inch-dimensioned power-transmission systems. It pairs with L110H, L110N or L110U centre elements.

Carbon Steel Hub With Set-Screw Locking

The hub body is made from carbon steel with an outside diameter of 3 21/64 inches and an overall length of 4 15/64 inches. The set-screw locking style allows straightforward installation on prepared shafts without specialised tooling. The straight jaw profile ensures the spider element seats evenly, simplifying alignment checks during routine servicing or initial assembly.

Rated To 5000 RPM With Spider-Dependent Horsepower

Maximum operating speed is 5,000 RPM. At 100 RPM the hub transmits 1.3 hp with a Buna-N spider, 2 hp with a urethane spider and 3.6 hp with a Hytrel spider. These ratings let engineers select the appropriate spider material for the torque and damping requirements of their application. The hub itself adds no active cooling or noise sources.

Highlights

  • Precision fit with 7/8 in bore and 3/16 in keyway
  • Carbon steel hub rated for 5 000 RPM max speed
  • Flexible power options: 1.3 hp Buna-N, 2 hp Urethane, 3.6 hp Hytrel at 100 RPM
  • Set-screw locking on straight-jaw profile for secure shaft connection
  • 3 21/64 in OD by 4 15/64 in overall length fits L110 elements

Specifications

No published specifications for this item yet.

Questions about this item

What maximum speed does the L110 hub rating of 5,000 RPM cap in practice?

The hub is rated for 5,000 RPM maximum speed, which limits the operational velocity of the connected shaft assembly.

What shaft diameter and keyway dimensions are required to fit the 7/8 in bore with 3/16 in keyway width and 3/32 in depth?

The hub fits a 7/8 in diameter shaft with a 3/16 in wide by 3/32 in deep keyway for positive torque transmission.

How is the set screw locking installed, and what step is often missed when securing the hub to the shaft?

Install the hub onto the keyed shaft, align the key in the keyway, then tighten the set screw over the key; the missed step is confirming the set screw seats on the key, not the shaft flat.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.