York S1-028-04255-700 Sheave

The York S1-028-04255-700 Fixed Sheave is a critical drive component engineered for high-performance HVAC blower assembly applications. This single-groove pulley features a precision-machined 3/4-inch bore designed to provide a secure interference fit on drive shafts, minimizing vibration and ensuring consistent airflow performance. Constructed from durable cast iron or heavy-duty steel, it maintains structural integrity under the high torque demands of industrial OEM furnace parts. Designed as a direct replacement for York, Luxaire, and Coleman equipment, this fixed pitch sheave ensures a constant drive ratio for belt-driven motor systems. For technicians performing preventative maintenance or emergency repairs, the S1-028-04255-700 blower pulley offers the reliablity needed to maintain static pressure and system efficiency. Utilizing a standard A-section or 4L belt profile, this component is essential for restoring factory-spec operation in commercial and residential air handlers.

Key Technical Benefits

• Direct OEM Compatibility: Precise engineering for York, Coleman, and Luxaire HVAC units to ensure exact shaft alignment.
• Fixed Drive Ratio: Eliminates the risk of slippage or adjustment drift common with variable pitch sheaves in high-static applications.
• Vibration Reduction: Machined to strict tolerances to prevent premature bearing wear on the blower motor and shaft.
• Thermal Stability: Heavy-duty construction dissipates heat effectively, extending the service life of the drive belt.
• Simplified Installation: Standard 3/4" bore with integrated set screw for rapid field replacement during service calls.

Common Installation Questions

What belt size is compatible with the York S1-028-04255-700?
This 1-groove sheave is typically designed for use with standard A-section or 4L V-belts. Always verify the width of your existing belt to ensure proper seating in the groove.

How do I ensure this sheave won't slip on the motor shaft?
Ensure the 3/4" shaft is free of burrs or rust. Tighten the set screw onto the flat portion of the shaft or the keyway to maintain a rigid connection under load.

Can this part replace a variable pitch sheave of the same diameter?
Yes, provided the diameter matches your required RPM and the bore size is identical. Switching to a fixed sheave is often preferred for long-term stability in constant-volume systems.

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.