Lau 0574300003M Blower Assembly

The Lau 0574300003M Blower Assembly is a heavy-duty belt drive blower engineered for residential and light commercial HVAC applications. Known by the model designation A9-9ACE, this unit features a 3/4" shaft size precision-ground from high-grade steel to ensure concentricity and reduced vibration during high-torque operation. With nominal dimensions of 11 7/8" x 10 1/4", the assembly serves as an essential component for air handlers, furnaces, and rooftop units requiring consistent cubic feet per minute (CFM) delivery. The housing is constructed from heavy gauge steel and incorporates universal supports, allowing for versatile mounting in various blower cabinet configurations. Equipped with sealed ball bearings and a pre-installed motor mounting bracket, this centrifugal blower assembly is designed to facilitate quick field replacements while maintaining the static pressure technical requirements of the original equipment manufacturer (OEM).

• Precision Ground Shafting: Features both keyways and flats to accommodate a wide range of pulley drivers and horsepowers.
• Vibration Dampening: Includes integrated vibro-pads and mounting hardware to minimize mechanical resonance and structural noise.
• Industrial-Grade Bearings: Built with sealed ball bearings that prevent contaminant ingress, extending the service life of the rotating assembly.
• Universal Compatibility: The Model A9-9ACE footprint fits numerous HVAC brands, making it a reliable stock item for service contractors.

What motor size is required for the A9-9ACE blower?
The assembly is designed for use with standard NEMA frame motors used in belt-drive applications. Compatibility depends on the specific blower speed and load requirements of your system.

Are the bearings replaceable on this Lau blower assembly?
Yes, the 3/4" bore bearings can be replaced; however, the assembly comes factory-installed with sealed units to provide maintenance-free operation under normal conditions.

Does this unit include the motor or pulleys?
This is a blower assembly less motor. It includes the wheel, housing, shaft, and bearings, but requires a separate motor and drive pulleys matched to your unit's performance curve.

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.