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3112KL-05W-B69 axial cooling fan is an industrial replacement cooler for boring machine inverters and frequency converters. Rated DC24V 0.28A and sized 80×80×32mm, it comes with a 3-wire cable that provides fan speed feedback signal for host monitoring. It continuously exhausts hot air from inside the inverter enclosure to prevent power component overheating, thermal protection trips and unexpected machine shutdown. The ball bearing structure offers outstanding durability for non-stop heavy-duty industrial use. Dynamically balanced fan blades lower wobble and operational noise. Mounting positions and connector fully match OEM specifications, no modification needed for installation. Every fan passes strict pre-shipment tests for rotation, airflow and tachometer signal output. It is a reliable spare part for boring machine inverter thermal repair.