What size air compressor do I need to run an air grinder effectively?

Answer 1

Most air grinders I'm familiar with run on 90 psi, which is a normal plant air pressure. Something that will put out a sustained pressure At 90 psi...I think a ten gallon tank will be big enough for most general air requirements. If you are going to use it in a shop environment, I would seriously consider getting the biggest I could afford. Then you could use multiple air tools at the same time.

Answer 2

The tool should have come with directions that tell you the CFM(Cubic Feet / Minute) needed and the Maximum Operating pressure. You will need to find a compressor that can supply the necessary CFM at the pressure you need. Most compressors are list CFM at 90 psi and at 45 psi, you must extrapolate from those two measurements how many CFM will be supplied at the pressure you need. If you compressor has a lower CFM rating than the tool you are using, you will wear out the motor faster, and you will have to pause in your work to let the compressor cycle. Generally the larger the tank, the more CFM a compressor can handle, but there are exceptions to that. Generally oil lubricated compressors can run longer, with more CFM, than oilless, but there are exceptions. The one hard and fast rule is this, for the same size compressor, oilless is louder than oiled. But, oil lube compressors require more maintanence.

Answer 3

Depends on the grinder. As stated above you need the CFM to run it. A tiny "DU-MORE" requires alot less air than a honkin 8 inch angle grinder. A safe bet would be at least a 5 horse / 7 CFM for most residential work.

Answer 4

90lbs air pressure and the bigger tank you have the less it will kick on

Answer 5

probably a 10 gallon

Answer 6

at least a 10-gal. tank