Answer
Most manufacturers do not state the duty cycle of their compressors, but a 50% duty cycle is common for most consumer grade compressors.
We recommend sizing the compressor 1.25-1.5 times the CFM of your tool for continuous operation. If the compressor does not produce enough air volume, CFM, then the pressure will drop.
Reciprocating (Piston) compressors are not designed for continuous or 100% duty cycle. The compressor will cycle off & on if it is sized correctly.
Just add up the CFM of the air tools that will be in use at the same time to get the minimum CFM required.
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