Rheem-Ruud 70-18631-01 Blower Wheel

The Rheem-Ruud 70-18631-01 Blower Wheel is a precision-engineered OEM replacement blower wheel designed for high-static pressure applications in residential and light commercial furnaces and air handlers. Featuring a 9-1/2" diameter and 7-1/8" width, this double inlet blower wheel utilizes 43 blades and a convex disc design to optimize cfm output and maintain system static balance. The 1/2" bore configuration is tailored for direct drive blower motors, ensuring a secure fit via a single set screw (no keyway required) to eliminate vibration and shaft slippage. Operating with a clockwise (CW) rotation (viewed from the drive end), this component is critical for restoring airflow efficiency and reducing motor amp draw in aging HVAC units. For contractors performing a Rheem furnace blower wheel replacement, this genuine part ensures dimensional accuracy and structural integrity where generic aftermarket wheels often fail to meet factory airflow curves.

Key Benefits for Technicians:

• Optimized Airflow Dynamics: The convex double-inlet design maximizes air intake and discharge efficiency, reducing mechanical stress on the blower motor.
• Direct Drive Compatibility: Designed specifically for direct drive applications with a standard 1/2 inch bore for rapid field installation.
• Vibration Reduction: Factory-balanced 43-blade construction minimizes harmonic noise and prevents premature bearing wear on the motor shaft.
• OEM Specification Match: Replaces Rheem 70-18631-01 exactly, maintaining the original heating and cooling performance ratios of the equipment.

Common Questions:

How do I verify the rotation of the 70-18631-01?
This wheel is rated for Clockwise (CW) rotation. When looking at the wheel from the hub/motor side, the blades must turn clockwise to move air correctly. Installing a wheel with incorrect rotation will lead to significantly reduced airflow and potential motor overheating.

What is the difference between a convex and concave blower wheel disc?
The convex disc on this Rheem wheel curves outward, which is a structural feature of many double inlet centrifugal fans to provide better stability and air distribution across the blade surface compared to flat or concave designs.

Does this wheel require a keyway for the motor shaft?
No, this model features a smooth 1/2" bore and is secured to the motor shaft using a single set screw. Ensure the shaft is clean and free of burrs before sliding the new wheel into position to ensure a concentric fit.

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.