A218021-335 Cornell Pump OEM Drive Coupler | Compressor Motor-to-Air-End Coupling

The A218021-335 Cornell OEM Drive Coupler is an original equipment flexible coupling engineered specifically for use in Cornell compressor drive assemblies. This component connects the prime mover?typically an engine or electric motor?to the compressor air-end, allowing rotational power to be transmitted efficiently while absorbing torsional vibration and compensating for minor shaft misalignment.

Cornell compressor systems are commonly installed in mobile service trucks, utility vehicles, and industrial field equipment where vibration, load changes, and harsh operating conditions are common. In these environments, the drive coupler plays a critical role in protecting high-value rotating components from shock loads and misalignment-related stress.

The A218021-335 coupler is manufactured to Cornell OEM engineering standards to ensure proper fitment, balance, and long-term reliability under continuous-duty operation.

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Key Features and Benefits

• Genuine Cornell OEM Part ? Factory-specified original equipment component

• Exact Fit & Function ? Direct replacement for the original factory-installed drive coupler

• Elastomeric Flexible Design ? Absorbs torsional vibration and dampens shock loads

• Smooth Torque Transmission ? Stable, backlash-free power transfer from engine or motor to air-end

• Misalignment Compensation ? Accommodates angular, axial, and parallel shaft misalignment

• Heavy-Duty Construction ? Designed for mobile and industrial compressor service

• OEM Reliability ? Preserves original compressor performance and service life

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Functional Design and Performance

The A218021-335 OEM drive coupler utilizes a resilient elastomer element bonded to precision-machined metal hubs. This construction allows the coupler to function as a torsional buffer, isolating vibration and transient torque spikes before they are transmitted into the compressor drive train.

Mobile compressor systems experience frequent starts and stops, variable engine speeds, and load changes that generate torsional shock. Without proper damping, these forces can accelerate wear on shafts, bearings, seals, and air-ends. The elastomer element within the A218021-335 absorbs these forces, helping maintain alignment, reduce mechanical noise, and protect adjacent components.

Because this is a genuine OEM Cornell component, the elastomer hardness, bonding process, and hub geometry are matched exactly to compressor operating characteristics. This ensures predictable damping behavior and consistent torque transfer throughout the service life of the coupler.

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Applications and Compatibility

The A218021-335 Cornell OEM Drive Coupler is commonly used in:

• Cornell mobile air compressor systems

• Truck-mounted and utility vehicle compressors

• Industrial compressed air systems

• Engine-to-air-end drive assemblies

• Compressor rebuilds and preventative maintenance programs

This coupler is intended as a direct OEM replacement for the original factory-installed unit referenced by part number A218021-335.

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Technical Specifications

• OEM Part Number: A218021-335

• Manufacturer: Cornell

• Component Type: Flexible elastomeric drive coupler

• Material: Steel hubs with bonded elastomer element

• Function: Torque transmission with vibration damping

• Misalignment Capability: Angular, axial, and parallel

• Operating Environment: Mobile and industrial compressor drive systems

• Maintenance: Lubrication-free; inspect during routine compressor service

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Advantages of Using a Genuine Cornell OEM Coupler

Using the A218021-335 genuine Cornell OEM drive coupler ensures your compressor drive system operates exactly as designed. Non-OEM or incorrect couplers may differ in elastomer stiffness, balance, or dimensional tolerances, which can introduce excessive vibration, reduce efficiency, and shorten air-end life?especially in mobile applications.

This OEM coupler delivers consistent torque transmission, minimizes mechanical stress on connected components, and helps extend the service life of bearings, shafts, and compressor air-ends. For mission-critical mobile air systems, genuine OEM components are essential for maintaining uptime and reliability.

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Why Choose Stark Industrial Products

Stark Industrial Products supplies verified genuine OEM compressor components, including original Cornell drive couplers. We do not substitute aftermarket equivalents when OEM parts are specified.

• Genuine OEM Cornell parts

• Fast order processing and secure packaging

• Knowledgeable technical support

• Trusted supplier for industrial and mobile compressor components

If you need assistance confirming compatibility with a specific Cornell compressor model or configuration, our team is ready to help.