Lovejoy 68514458617 Oldham Coupling Hub 1/4 in Bore

Product Description

The LOVEJOY 68514458617 is a flexible Oldham coupling hub designed for precision motion control applications where shaft misalignment must be accommodated without transmitting bending loads. The hub features an aluminum body paired with a polyacetal (acetal resin) insert that absorbs angular and parallel misalignment between connected shafts. With a minimum bore diameter of 0.25 inches, an outside diameter of 0.984 inches, and an overall length of 1.535 inches, this component is sized for compact drive assemblies. Rated at 18 inch-pounds of torque, it is suitable for light-duty servo, stepper motor, and instrumentation drive trains. Installation is handled by mechanical technicians and machine builders working on automation and motion systems.

This coupling hub fits residential and light commercial automation equipment, small conveyor drives, pump drives, and instrumentation assemblies where rotational accuracy and vibration damping are required. The Oldham design uses a floating center disk (insert) to transmit torque while allowing lateral shaft offset. This hub is part of the LOVEJOY MOL series. Note that a complete Oldham coupling requires two hubs of matching outside diameter and one center insert — all three components must be ordered separately. Bores on the two hubs can differ, allowing connection of shafts of different diameters.

Key Features

• Aluminum hub construction with polyacetal insert for corrosion resistance and light weight
• Clamp-style hub secures to shaft without set screws for even clamping force
• Accommodates parallel and angular shaft misalignment inherent to the Oldham design
• Rated torque capacity of 18 inch-pounds for light-duty drive applications
• Compact geometry: 0.984 inches OD and 1.535 inches overall length for space-constrained assemblies
• Part of the MOL series (size code MOL25C) for easy cross-reference with compatible inserts and mating hubs

Compatibility

This hub is part of the LOVEJOY MOL series (size code MOL25C). A complete coupling assembly requires two MOL25C hubs of the same outside diameter and one corresponding MOL series center insert. Hub bores may differ between the two hubs to accommodate shafts of unequal diameter.

Installation Notes

Installation is typically performed by mechanical technicians or machine builders. Disconnect and lock out all power to the drive system before disassembling or mounting coupling components. Clamp-style hubs require the bore to be clean and free of burrs before insertion of the shaft. Confirm shaft diameters and hub alignment before final clamp torque is applied — do not force misaligned shafts into the assembly.