Centrifugal Blowers with Ball Bearings CUI Devices Centrifugal Blowers offer frame sizes ranging from 40mm to 120mm with ball-bearing construction. These blowers provide airflow ranging from 1.17CFM up to 44.2CFM and rated voltage of 5VDC, 12VDC, and 24VDC. CUI Devices Centrifugal Blowers come standard with auto-restart protection on all models.