Carrier P461-3503 Motor Pulley

The Carrier P461-3503 Motor Pulley is a precision-engineered OEM HVAC replacement part designed for high-demand air handling applications. Constructed from durable cast iron, this adjustable motor pulley features a 5/8" bore and a 3-inch outer diameter, specifically balanced to minimize vibration and extend the service life of both the motor and the drive belt. As the direct replacement for KR11HY151, this component ensures a seamless fit within Carrier-specific belt-driven blower systems.

For service technicians, the P461-3503 offers critical flexibility with its variable pitch diameter ranging from 1.9 to 2.9 inches. This allows for fine-tuned adjustments to the blower speed, ensuring precise airflow CFM management and optimal system performance. The inclusion of a high-quality key way provides a secure, slip-resistant mechanical connection to the 5/8-inch shaft, even during high-torque startup cycles. This part is essential for maintaining mechanical efficiency in commercial and residential fan coils and package units where reliable power transmission is non-negotiable.

• Durable Cast Iron Construction: Resistant to corrosion and thermal expansion, ensuring long-term structural integrity in harsh mechanical rooms.
• Adjustable Pitch Settings: Permits the technician to dial in the exact pitch diameter (1.9"-2.9") needed for specific static pressure requirements.
• Precise OEM Fit: Engineered as an exact Carrier replacement pulley, eliminating the alignment issues common with generic aftermarket sheaves.
• Belt Life Optimization: Smooth groove finishing reduces friction and heat buildup, significantly extending the life of A or AX section belts.

Is the Carrier P461-3503 compatible with other brands?
While designed as a Carrier OEM part and a direct KR11HY151 replacement, it will fit any motor with a standard 5/8" shaft requiring a 3" diameter adjustable sheave.

How do I adjust the pitch on this pulley?
The pitch is adjusted by loosening the set screw on the movable flange, allowing you to rotate the flange to increase or decrease the effective pitch diameter for speed control.

What is the primary material of this component?
This pulley is manufactured from heavy-duty cast iron, providing the weight and stability required for industrial HVAC motor drive 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.