Carrier KR51BF415 Pulley 7/8-inch bore 4.15-inch OD

Product Description

The Carrier KR51BF415 Motor Pulley is a precision-engineered fixed-bore drive component for Carrier, Bryant, and Payne air handling units and rooftop systems. It features a 7/8-inch bore and a 4.15-inch outside diameter, designed for Type A or AX section belts. Constructed from high-grade cast iron, this OEM replacement part ensures correct belt tensioning and airflow delivery, maintaining precise blower wheel RPMs and supporting commercial HVAC configurations. It provides superior vibration dampening and heat dissipation.

• Precision machined bore ensures a secure fit on 7/8-inch shafts, reducing runout and shaft scoring.
• Cast iron construction provides enhanced thermal stability, handling high-torque start-ups without warping.
• The 4.15-inch outside diameter profile is designed for optimal belt contact, preventing HVAC belt slippage.

Product Highlights

Direct OEM specification maintains original equipment performance and airflow CFM.

Product Information

Standard Information

• Brand: CARRIER
• Manufacturer Part Number: KR51BF415
• Country of Origin: United States

Technical Specifications

• Brand: CARRIER
• MPN: KR51BF415
• Product Type: Pulley
• Country of Origin: United States
• Condition: New
• Bore Size: 7/8-inch
• Outside Diameter: 4.15-inch
• Compatible Belts: A-section V-belts or cogged AX belts
• Material: Cast Iron
• Part Type: OEM Replacement
• Pulley Type: Fixed Pitch