Compressors fall into three general areas; Small portable units like the Porter-Cable Job Boss often with one pancake or two small storage tanks, Mid-size units like Campbell-Hausfield, which normally have wheels, and large compressors have fixed bases for shops and industrial sites. In terms of capacities, smaller units start around 1.5 horse and larger unites can exceed 6 horse power motors. The pumps themselves are either oil-less or oil-lubricated and the pumps are one or two cylinder and singe of two-stage compressors …. and this last statement is the reason most wood workers dont have an air compressor, because they sound complicated.
Some of the useful terms that you should know about when looking for a compressor include: PSI – Pounds per square inch, CFM – Cubic feet per minute, Duty Cycle – is the amount of time a compressor can run compared to the amount of rest time (storage tank) over a 30 minute period … such as it can operate for 10 minutes, then rest for 20 without creating significant head wear, Single Stage – is where the compression piston compresses all the air in one stroke, Two Stage – is where there are two...