York S1-028-04764-700 Groove Sheave

The York S1-028-04764-700 is an OEM-grade Variable 1-Groove Sheave designed for precision airflow calibration in light commercial and residential belt-drive HVAC systems. Specifically engineered with a .875 inch bore (7/8"), this adjustable pitch pulley allows technicians to fine-tune blower speeds and system CFM without the need for modular motor changes. This component is essential for air handlers and condensers where field balancing is required to meet static pressure specifications. Constructed from durable cast materials, the York S1-028-04764-700 ensures concentric rotation and minimizes vibration on the motor shaft, extending the life of the blower assembly. As a direct replacement York blower motor pulley, it maintains factory performance levels in HVAC belt drive adjustment scenarios. Proper seating on the .875" shaft is critical for maintaining torque transfer and preventing slippage during high-demand cooling or heating cycles.

Key Performance Benefits

• OEM Compatibility: Precision-machined to integrate seamlessly with York S1-028-04764-700 equipment specifications.
• Adjustable Pitch Design: Enables field-adjustable blower speeds to optimize system performance and airflow.
• Industrial Construction: High-grade cast iron provides the heat dissipation and structural integrity needed for continuous operation.
• Standard .875" Bore: Features a 7/8 inch inner diameter for a secure fit on standard motor shafts.

Common Technical Questions

What is the bore size for the York S1-028-04764-700?
This sheave features a precision-machined .875" (7/8 inch) bore, designed to fit standard NEMA frame motor shafts common in York air handling units.

How do you adjust the pitch on this variable groove sheave?
Technicians can adjust the pitch by loosening the set screw on the adjustable flange, rotating the flange to the desired width to increase or decrease the effective diameter, and then re-securing the set screw on the flat of the hub.

Can this pulley be used as a substitute for fixed-pitched sheaves?
Yes, provided the belt profile and shaft diameter match. Utilizing a variable pitch pulley allows for greater flexibility during system commissioning and air balancing compared to fixed-ratio drives.

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.