040-812

This 1/4 inch x 1/4 inch square motor shaft key is a vital mechanical component used to lock pulleys, blower wheels, and drive gears securely onto a rotating motor shaft. By fitting precisely into the keyway of both the shaft and the attached component, it ensures a positive drive and prevents slippage during operation. Ideal for HVAC blowers, furnace fan motors, and industrial air handling units, this replacement key is essential for maintaining efficient torque transfer and system reliability. Whether you are repairing a belt-driven ventilation system or performing routine motor maintenance, this durable square key stock provides the necessary shear strength to handle high-rotational loads and prevent mechanical failure.
Type: Blower Shaft Hardware
Size: Small / Standard 1/4 inch
Dimensions: 1/4 inch × 1/4 inch
Application: Secures pulleys, fans, and blower wheels to motor drive shafts in HVAC systems, furnace blowers, and industrial ventilation equipment.
Specifications: Square key profile, precision-milled for standard 1/4 inch keyways, high-torque resistance.