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brand-new 3112KL-05W-B69 axial cooling fan is a dedicated industrial cooler for boring machines and frequency converters. It measures 80×80×32mm, runs at DC24V 0.28A with a 3-wire harness including speed feedback signal. The ball bearing structure ensures reliable 24-hour continuous operation in factory environments. It expels hot air from inside inverter cabinets to protect power semiconductor chips from overheating damage and unexpected machine shutdown. Dynamically balanced fan wheel minimizes wobble and bearing squeal. The mounting hole positions and cable connector match OEM specifications perfectly, no modification required for installation. Each fan undergoes strict factory testing of rotation stability, airflow and signal output before packaging. It is a cost-effective spare part for boring machine and inverter thermal repair.