LJ100138 Lovejoy Jaw Coupling 1-3/8 inch Bore | L100 Series

LJ100138 Lovejoy | L100 Series

L100 jaw coupling hub with 1-3/8 in. bore for smooth, vibration-resistant torque transfer

• AR LJ100138 is a precision-engineered Lovejoy L100 jaw coupling hub
  with a 1-3/8-inch bore, designed by Annovi Reverberi for smooth, balanced, and
  vibration-resistant torque transmission in demanding pump and motor systems.
• Built for industrial performance and durability, it provides a secure
  mechanical connection, reliable alignment, and long service life in continuous-duty applications.
• Ideal for high-pressure cleaning systems, hydraulic assemblies, compressors,
  and manufacturing machinery where stable power transmission is critical.

Design & Construction

High-strength steel hub with precision-machined 1-3/8 in. bore

• Constructed from high-strength steel for superior resistance to mechanical
  stress, wear, and distortion under heavy torque loads and frequent start–stop cycles.
• 1-3/8-inch precision-machined bore fits tightly on the shaft to ensure
  concentric, stable power transfer with minimal runout.
• Includes an integrated keyway and set screw for a positive, slip-free
  shaft connection that maintains timing during acceleration and deceleration.
• Compact L100 envelope allows installation in tight equipment bays while
  preserving access to nearby components.
• Corrosion-resistant surface finish supports reliable operation in environments exposed
  to moisture, detergents, and cleaning chemicals.

LJ100138 Coupling Function & Protection

Three-jaw Lovejoy interface with elastomer spider (sold separately)

• Uses a three-jaw interlocking design that mates with a matching L100 hub
  and an elastomer spider insert to transmit torque efficiently with low backlash.
• Elastomer spider (purchased separately) absorbs vibration and shock loads,
  protecting motors, pumps, and bearings from torque spikes and misalignment.
• Accommodates angular, parallel, and axial misalignment that naturally
  occurs in rotating systems, without over-stressing connected components.
• Steel body’s accurate jaw geometry ensures uniform load distribution on the
  elastomer element for consistent performance and minimal wear.
• Fail-safe coupling design: if the elastomer insert degrades, metal jaws
  remain partially engaged to maintain limited drive and prevent sudden disconnection.

Performance & Applications

Balanced, low-vibration hub for industrial pump and motor drives

• Machined to tight tolerances for balanced rotation and reduced vibration,
  improving overall system stability and operator comfort.
• High torque capacity and steel rigidity make it suitable for
  continuous-duty and variable-load applications.
• Widely used in industrial cleaning equipment, pump drives, hydraulic power units,
  compressors, and general manufacturing machinery.
• Helps reduce mechanical noise and pressure ripple in sensitive systems by maintaining
  proper alignment and damping torsional disturbances through the spider.
• Supports long-term operation where high torque, minimal vibration, and low
  maintenance are required.

Installation & Maintenance

Straightforward mounting with simple, low-maintenance service

• Installation is simple: slide the hub onto the 1-3/8 in. keyed shaft,
  align the key, set axial position, and tighten the set screw to lock in place.
• Position the appropriate L100 elastomer spider between the LJ100138 and
  its companion hub to complete the coupling assembly.
• Requires no lubrication; routine service consists mainly of periodic visual
  inspection of the elastomer insert for wear, cracking, or hardening.
• Insert replacement is quick and can typically be done without removing hubs or
  disturbing shaft alignment, minimizing downtime.
• Heavy-duty steel hub usually remains in service across many insert changes, providing a
  long-term, low-maintenance coupling foundation.

LJ100138 Key Features & Keywords

Spec highlights for selection and search

• Model: AR LJ100138 – Lovejoy L100 jaw coupling hub.
• Bore: 1-3/8 in. precision-machined with keyway and set screw.
• Material: high-strength, corrosion-resistant steel.
• Interface: three-jaw Lovejoy L100 profile for use with L100 spider insert.
• Benefits: smooth torque transmission, vibration damping, misalignment tolerance,
  reduced noise, and extended pump/motor life.
• Keywords: LJ100138, L100 coupling hub, 1-3/8 inch bore, Lovejoy jaw coupling,
  steel hub, pump and motor coupling, vibration-resistant torque transmission.