Carrier KR11AZ002 Plastic Sheave

The Carrier KR11AZ002 is a high-performance 8.25-inch plastic sheave engineered for demanding commercial HVAC blower applications. Featuring a precision-machined 1-inch bore, this fixed-pitch fan pulley is designed for direct compatibility with Carrier, Bryant, and Payne air handlers and packaged rooftop units. As a vital component in mechanical power transmission, it ensures stable belt tracking and consistent blower speed ratios, which are critical for maintaining design CFM and proper static pressure across the evaporator coil.

Manufactured from reinforced, industrial-grade plastic, the Carrier OEM blower sheave offers superior corrosion resistance and weight reduction compared to traditional cast-iron alternatives, reducing starting torque and bearing load. This replacement pulley is ideal for HVAC belt drive motor service where exact dimensional tolerances are required to prevent premature belt wear or system vibration. When replacing a worn sheave, always verify the shaft diameter and align the drive using a straight edge or laser tool to optimize efficiency and prevent motor overloading.

• Precision OEM Fit: Drop-in replacement for Carrier part number KR11AZ002, ensuring perfect alignment with 1" motor shafts.
• Industrial Polymer Construction: Durable 8.25" plastic sheave resists rust and chemical exposure in harsh rooftop environments.
• Optimized Power Transfer: Engineered for smooth V-belt engagement, reducing friction and extending the life of your HVAC drive belt.
• Reduced Mechanical Stress: Lightweight design minimizes shaft vibration and decreases operational wear on blower motor bearings.

What is the maximum RPM rating for this plastic pulley?
This blower sheave is balanced to meet standard commercial blower motor RPMs; however, you should always check the unit's data plate and ensure the motor amperage does not exceed nameplate ratings after installation.

Is this a variable pitch or fixed pitch sheave?
The Carrier KR11AZ002 is a fixed-pitch HVAC sheave. If you are replacing an adjustable sheave to fix a set speed, ensure your pulley diameter calculations are correct to maintain the proper airflow.

Can I use a standard 3-jaw puller to remove the old sheave without damage?
Yes, but take care to apply pressure to the center hub. Using a lubricant like Kroil and cleaning the shaft with sandpaper before sliding the new 1-inch bore pulley on is a standard best practice for technicians.

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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.