LJ09558-S Lovejoy Coupling Hub 5/8″ Bore

LJ09558-S Lovejoy Coupling Hub 5/8 inch Bore 5/32 inch Key | L095 Series

Steel Lovejoy L095 hub for smooth, vibration-damped power transmission

• LJ09558-S (AR LJ09558-S) is a precision Lovejoy L095 steel hub
  with a 5/8″ bore and 5/32″ keyway, designed to pair
  with an L095 elastomer spider and matching hub for reliable shaft-to-shaft coupling.
• Engineered to transmit torque between electric motors, hydraulic drives, and pumps
  in pressure-washer skids, sprayers, compressors, and general industrial equipment.
• Jaw-style coupling design combines accurate alignment with
  vibration damping, helping protect bearings, seals, and surrounding components.
• High-strength steel construction with a corrosion-resistant finish maintains geometry and fit
  in washdown, humid, and light chemical environments commonly found around cleaning systems.

Design & Construction

High-strength steel hub with precision bore and keyway

• Material: machined from high-strength steel to resist deformation under
  torque spikes, start–stop cycles, and daily duty.
• Bore: precision-machined 5/8″ straight bore provides a snug,
  concentric fit on standard keyed shafts for smooth rotation and reduced runout.
• Keyway: 5/32″ keyway creates a positive mechanical drive,
  resisting slippage during acceleration, deceleration, and intermittent loading.
• Jaw profile: standard L095 jaw geometry ensures full
  compatibility with L095 spiders and companion hubs already used in the field.
• Finish: treated exterior helps resist rust and cosmetic corrosion from
  washdown, ambient moisture, and incidental chemical exposure.

Coupling Function

Jaw-and-spider system for misalignment tolerance and shock absorption

• Functions as one half of a jaw-style shaft coupling: two L095 hubs clamp an
  elastomer spider between their jaws to transmit torque.
• Elastomer spider flexes to accommodate small angular, parallel, and axial
  misalignment created by mounting tolerances, thermal growth, or frame movement.
• Flexible element cushions torsional shock and vibration, reducing noise and
  helping pumps and motors run smoother and quieter.
• Jaw faces and clearances are controlled so load passes through the elastomer, not
  metal-to-metal contact—protecting the insert and preventing harsh impact.
• Balanced mass distribution and concentric bore help maintain stable rotation at
  typical motor speeds, supporting consistent hydraulic output and longer component life.

Installation & Alignment

Straightforward mounting with best practices for long service life

• Slide the hub onto the keyed 5/8″ shaft, align the 5/32″ key, and
  position it to achieve the specified jaw-to-jaw gap for the selected L095 spider.
• Secure the hub according to the equipment manufacturer’s instructions so it seats
  squarely on the shaft without inducing runout or side load.
• When both hubs are installed, center the spider between them so it is neither
  crushed nor loose; correct spacing reduces heat and extends insert life.
• For best results, verify angular and parallel alignment using feeler gauges or
  alignment tools—proper alignment minimizes restorative forces that can bend shafts or
  overload bearings.
• Compact L095 envelope allows good access around the coupling for torque checks,
  spider replacement, and inspection even in tight pump or motor bays.

LJ09558-S Lovejoy Coupling Hub 5/8 inch Bore 5/32 inch Key | L095 Series Applications

Versatile hub for pumps, sprayers, and industrial machinery

• Pressure-washer and pump drives: connects electric motors or hydraulic
  motors to high-pressure pumps on skids, carts, and fixed plant systems.
• Sprayers and fluid-handling systems: provides smooth power transfer to
  chemical, agricultural, or industrial sprayer pumps.
• General industrial equipment: suitable for blowers, small compressors,
  agitators, and other shafted machinery using L095 jaw couplings.
• Mobile rigs & OEM skids: compact size fits crowded frames while
  tolerating modest frame flex and vibration in mobile service trucks and trailers.
• Ideal wherever a standard Lovejoy L095 hub with 5/8″ bore and 5/32″
  keyway is specified for reliable, serviceable torque transmission.

Maintenance & Serviceability

Hub stays in place while the elastomer spider takes the wear

• Steel hub is designed for long-term use; in normal service, routine maintenance focuses
  on the elastomer spider, which is the sacrificial flexible element.
• Periodically inspect the spider for cracks, hardening, or chunking; replace
  as needed to maintain damping performance and alignment protection.
• Hubs typically remain in situ on their shafts during insert changes, which
  preserves original alignment and minimizes downtime.
• Interchangeable with standard L095 spiders and mating hubs, simplifying
  sourcing and field replacement across mixed fleets or OEM builds.
• Properly maintained couplings help extend pump and motor life, reduce vibration-related
  fastener loosening, and keep systems running within design pressure and flow specs.

Key Features LJ09558-S Lovejoy Coupling Hub

5/8 inch Bore 5/32 inch Key | L095 Series

• Model: AR LJ09558-S — Lovejoy L095 steel hub.
• Bore / Keyway: 5/8″ bore with 5/32″ keyway, straight, keyed shaft fit.
• Style: jaw coupling hub for L095 spider, compatible with standard L095 components.
• Benefits: smooth torque transfer, misalignment tolerance, vibration damping, and long hub life.
• Keywords: AR, LJ09558-S, Lovejoy L095, 5/8 inch bore, 5/32 inch keyway,
  steel hub, jaw coupling, L095 spider, shaft coupling, vibration damping.