Carrier KR12HY118 Motor Pulley

The Carrier KR12HY118 Motor Pulley is a precision-engineered fixed-bore drive component designed for heavy-duty application in commercial HVAC air handling systems. This genuine OEM Carrier replacement part ensures optimal torque transfer and maintains precise fan speed calibration for consistent airflow performance. Manufactured from high-grade cast iron, the KR12HY118 pulley features a robust construction that minimizes vibration and reduces mechanical wear on drive belts and motor bearings. It is specifically engineered to meet the strict tolerances required for industrial HVAC motors, providing a secure fit on the motor shaft to prevent slippage during high-startup torque events. For contractors performing preventative maintenance or system repairs, utilizing this HVAC motor sheave ensures the system operates within original design specifications, maintaining the energy efficiency and static pressure capabilities of the Carrier air handler unit.

• Precision-machined fixed bore ensures concentric rotation and reduces harmonic vibration across the drive assembly.
• Compatible with standard HVAC drive belts, facilitating easy alignment and tensioning during installation.
• Heavy-duty cast construction provides superior heat dissipation and resistance to catastrophic fatigue.
• Exact Carrier OEM specification eliminates the guesswork associated with generic aftermarket sheaves.
• Direct replacement for KR12HY118, ensuring the drive ratio remains consistent with system balancing requirements.

What is the bore diameter and belt profile for the KR12HY118?
This pulley is designed to match specific shaft diameters and belt profiles common in Carrier commercial units; always verify your motor shaft size and belt type (typically A or B section) against the equipment submittal before installation.

Does this pulley include the set screw?
Yes, this component typically includes the hardened set screw required to secure the sheave to the motor shaft keyway for reliable operation.

Can I use this for variable speed applications?
The KR12HY118 is a fixed-pitch pulley; for applications requiring field adjustment of fan RPM, a variable-pitch sheave may be necessary unless the system is controlled by a VFD.

This item is not eligible for free shipping.

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.