NA and NAS Vari-Feed Wick Oiler are used to provide a controlled amount of oil to a bearing or other machinery part. The principle of delivery combines gravity feed with capillary action in the wick to provide a constant feed rate of oil regardless of the fill level in the reservoir. Feed rate is determined by the viscosity of the oil and the type of wick being used.
The NA and NAS Vari-Feed Wick Oiler have a filler cap with gasket that stops oil delivery when fully closed. By turning the fill cap slightly, the threaded air vent is opened allowing oil to flow.