York S1-028-10577-700 Fixed Blower Pulley

The York S1-028-10577-700 Fixed Blower Pulley is a precision-engineered OEM replacement part designed for high-demand HVAC blower motor applications. Built for industrial durability, this fixed sheave features a 1 3/16" bore size and a single groove configuration, accommodating a dry-back V-belt for consistent torque transfer. With an 11 3/4" outside diameter, it provides the exact mechanical advantage required to maintain calibrated cubic feet per minute (CFM) across your air handler or furnace system.

For technicians servicing York B1CH240A25EC or B1CH240A25B packaging units, this heavy-duty steel blower pulley ensures proper belt alignment and prevents the slippage common in worn aftermarket alternatives. Utilizing genuine York HVAC parts like the S1-028-10577-700 minimizes vibration and bearing stress on the motor shaft. This HVAC drive pulley is essential for restoring factory-spec static pressure and airflow efficiency in 20-ton and similar commercial rooftop heat pump systems.

• Precise Airflow Control: Fixed 11.75-inch diameter ensures stable blower RPM and consistent system CFM.
• Direct Fit OEM Specs: Machined with a 1 3/16" bore to match York shaft tolerances, eliminating installation play.
• Industrial Steel Construction: High-tensile material resists belt wear and thermal expansion under continuous duty cycles.
• Optimized Energy Efficiency: Reduces parasitic loss by maintaining strict pulley alignment and minimizing V-belt friction.

What is the bore size for the S1-028-10577-700 pulley?
This specific sheave is manufactured with a 1 3/16-inch bore, designed typically for large-frame blower motors found in commercial York units.

Can this fixed pulley replace an adjustable sheave?
If your system requires a specific, unchanging blower speed to meet static pressure requirements, this fixed blower pulley is the preferred choice over variable sheaves to ensure long-term setting stability.

Which belt type is compatible with this York pulley?
It is designed for standard A-section or BX-section V-belts. Always verify belt tension and alignment during installation to prevent premature failure.

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.