Profile: Columbus Fan & Machine Corporation offers solution to electrical motor cooling problems and all products are designed to NEMA standards to replace the major motor and accessories to manufacturers' specifications. Our product range includes cooling blowers & filters, PY tachometer & encoder mounting kits, heavy duty dancer position potentiometers, motor blowers, large capacity cooling blowers, barrel cooling blowers or custom blowers, PY tachometer adaptor brackets, polyester pre-filter wraps, motor brushes, meters and cooling blower failure switches. Our dancer duty potentiometer series is designed for use in harsh environments for a multitude of industrial applications.