Lovejoy 68514412001 Rubber Insert

The Lovejoy 68514412001 is a standard L150 Jaw Shaft Coupling NBR Elastomeric Spider designed for reliable power transmission in industrial HVACR and mechanical systems. This SOX rubber insert features a solid center design, making it the preferred choice for applications where the driver and driven shafts are separated by a standard gap. Constructed from high-grade Nitrile Butadiene Rubber (Buna-N), this elastomeric coupling element provides an 80A Shore hardness, offering an ideal balance of flexibility and resilience. Pros in the field rely on the L150 spider for its exceptional oil resistance and ability to withstand temperatures ranging from -40° to 212° F. This flexible coupling insert is engineered to accommodate angular misalignment up to 1° and parallel misalignment up to 0.015 inches, effectively dampening vibration and protecting connected equipment like compressors, centrifugal pumps, and blowers from shock loads. Its fail-safe design ensures that even if the elastomer fails, the jaw hubs will remain engaged to prevent total system shutdown.

• High-performance NBR construction: The Buna-N material is highly resistant to oil, grease, dirt, and moisture, ensuring long-term durability in harsh mechanical rooms.
• Vibration and shock absorption: The elastomeric spider naturally cushions the system, reducing wear on bearings and seals by absorbing peak torque loads.
• No metal-to-metal contact: Prevents premature wear of the L150 jaw hubs and ensures quiet operation during high-RPM cycles.
• Fail-safe operation: Designed to provide "peace of mind" for critical HVACR infrastructure; the coupling will continue to transmit power even if the insert is compromised.

What is the maximum RPM for the L150 NBR spider?
This solid center nitrile rubber insert is rated for speeds up to 5,000 RPM when paired with standard sintered iron or cast iron hubs.

Can I swap a SOX spider for a Urethane or Hytrel version?
Yes, the Lovejoy 68514412001 is dimensionally identical to other L150 inserts. However, NBR (SOX) is the best choice for general dampening and oil resistance, whereas Urethane is better for high-torque needs but offers less vibration isolation.

How do I know if my spider needs replacement?
Inspect the legs of the L150 coupling spider for visible cracking, swelling due to chemical exposure, or excessive "play" between the hub jaws, which indicates the 80A durometer material has reached its service limit.

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.