Compressor and air tool question

Figure out which tool has the highest cfm rating that you are going to use. If the DA sander uses 6 cfm and this is the tool that you will use that has the highest cfm then I would add about 2 -3 cfm minimum more for a compressor size. Make sure that you use the same pressure/cfm rating when you do this. As pressure goes up cfm goes down and visa versa. If your tool is rated a 90 psi then get the 90 psi rating on the compressor. Some of the cheap compressor companies use the cfm at freeflow to sell their compressors because at freeflow (0 psi) a compressor has the most amount of cfm. This makes their compressors look like they will do the job but won't.

Chuck