LJ225178 | Lovejoy L225 Jaw Coupling Hub, 1-7/8 in Bore

LJ225178

L225 jaw coupling hub, 1-7/8 in bore

• The AR LJ225178 is a Lovejoy L225 jaw coupling hub with a
  1-7/8-inch bore and 1/2 x 1/4-inch keyway, engineered by Annovi Reverberi
  for precise, high-torque power transmission and long-term vibration control in industrial pump and motor systems.
• Built from premium-grade steel, this heavy-duty hub delivers exceptional durability, balance,
  and strength for demanding continuous-duty applications.
• As part of the L225 coupling series, it connects with a matching hub and elastomer spider insert
  (sold separately) to create a flexible assembly that transmits torque efficiently while absorbing shock and
  compensating for shaft misalignment.

LJ225178 Design & Construction

High-strength steel body with precision bore and keyway

• 1-7/8-inch precision-machined bore ensures a tight, accurate shaft fit for smooth torque flow
  without slippage.
• 1/2 x 1/4-inch keyway provides positive drive engagement and secure locking under variable load
  conditions.
• Robust steel body resists deformation and fatigue, maintaining mechanical integrity and alignment
  over long service intervals.
• Three-jaw Lovejoy L225 geometry engages perfectly with the elastomer spider insert for uniform
  load distribution across the coupling.
• Corrosion-resistant finish protects against moisture, cleaning agents, and environmental exposure in harsh
  industrial settings.

Performance & Vibration Control

Flexible coupling for smooth, quiet operation

• Elastomer spider insert (sold separately) acts as a vibration dampener, isolating torsional
  oscillations and reducing mechanical noise.
• Cushions shock loads and torque spikes that could otherwise damage shafts, bearings, and seals.
• Compensates for minor angular, parallel, and axial misalignments that occur in dynamic systems,
  helping extend equipment life.
• Balanced hub geometry and precision machining support vibration-free operation and uniform torque
  distribution across the speed range.
• L225 series design offers higher torque capacity and larger shaft size compatibility than smaller
  couplings, ideal for heavy-duty drives.

LJ225178 Installation & Maintenance

Modular, lubrication-free coupling system

• Simple installation: slide the hub onto the keyed shaft, secure with the set screw, and position
  the elastomer spider between the two hubs before tightening the assembly.
• No lubrication required—clean operation helps prevent contamination in sensitive fluid-handling
  and cleaning systems.
• Modular design allows quick replacement of the elastomer insert without removing the hubs or
  realigning shafts, reducing downtime and service costs.
• Fail-safe Lovejoy configuration maintains limited torque transmission even if the elastomer
  spider wears out, as the jaws remain partially engaged until scheduled maintenance.
• Routine maintenance is limited to periodic inspection of the spider for wear, cracking, or hardening.

Applications

For pumps, hydraulic drives, and industrial machinery

• Ideal for industrial pumps and hydraulic drives needing reliable, high-torque power transfer with
  vibration control.
• Commonly used in compressors, manufacturing machinery, and process equipment where alignment
  protection and smooth operation are critical.
• Suited for fluid-handling systems and industrial cleaning equipment operating under continuous-duty
  or start-stop cycles.
• Excellent choice for large-scale mechanical assemblies that require stable, low-backlash torque
  transmission.

LJ225178 Key Features & Benefits

Spec highlights and selection notes

• Model: AR LJ225178 – Lovejoy L225 jaw coupling hub.
• Bore Size: 1-7/8 in precision-machined bore.
• Keyway: 1/2 x 1/4 in positive drive keyway.
• Series: L225 – heavy-duty, high-torque jaw coupling platform.
• Material: Premium-grade steel with corrosion-resistant finish.
• Benefits: High torque capacity, vibration damping, misalignment compensation, quiet operation,
  and extended life for pumps, motors, bearings, and seals.
• Keywords: LJ225178, Lovejoy L225 hub, 1-7/8 inch bore coupling, jaw coupling, elastomer spider,
  high-torque shaft coupling, industrial pump drive, vibration-damping coupling.