Lovejoy 68514412274 Rubber Insert

The Lovejoy 68514412274 is a professional-grade L190 Jaw Shaft Coupling NBR Elastomeric Spider, engineered for high-demand power transmission in industrial and HVACR systems. As a direct equivalent to the L-190SOX, this Solid Center Rubber Insert is manufactured from premium Nitrile Butadiene (Buna-N) rubber, providing a 1,728 in-lb torque rating and a maximum speed of 5,000 RPM. This flexible coupling element is designed to absorb significant shock loads and mitigate angular and parallel shaft misalignment, protecting critical components like pumps, fans, and compressors from premature wear. The SOX (NBR) material is specifically chosen for its superior oil resistance and resilience, operating reliably within a temperature range of -40°F to 212°F. Its 80A Shore hardness ensures a high damping capacity, reducing vibration and acoustic noise across the drivetrain. This elastomeric insert allows for fail-safe operation, maintaining a connection between hubs even if the spider becomes compromised during service.

Key Benefits

• High Torque Capacity: Rated for a nominal torque of 1,728 in-lbs (195 Nm) to handle heavy start-up loads in L190 series assemblies.
• Vibration Dampening: High-density NBR elastomeric material effectively absorbs kinetic energy and reduces mechanical resonance.
• Oil and Chemical Resistance: The SOX rubber construction is optimized for environments exposed to grease, hydraulic fluids, and external contaminants.
• Misalignment Compensation: Accommodates up to 1 degree of angular misalignment and 0.015 inches of parallel offset to prevent bearing failure.
• Solid Center Design: Provides maximum surface area contact for improved power transfer compared to open-center alternatives.

Common Questions

Is the L190 SOX insert interchangeable with other materials like Urethane or Hytrel?
Yes, the L190 series hubs are compatible with various spider materials. However, switching to Urethane or Hytrel will alter the torque rating and damping characteristics of the coupling. NBR (SOX) remains the standard for general-purpose industrial applications requiring balanced flexibility and oil resistance.

How do I identify when the jaw coupling spider needs replacement?
Technicians should inspect the elastomeric insert for visible signs of fatigue, cracking, or if the material thickness has worn down to less than 75% of its original dimension. Increased vibration or noise during operation typically indicates the rubber insert has reached the end of its service life.

Can this spider be used in high-temperature HVAC pump applications?
The Lovejoy 68514412274 is rated for continuous operation up to 212°F (100°C), making it suitable for most standard HVACR pump and blower motor configurations. For environments exceeding this range, a high-temperature material like Hytrel may be required.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.