15 cfm @ 90 psi is the spec; not sure it does that, but it can run any of my 40 odd cheapo air tools no problemo.
Cheap tools like HF are awesome for the money, they are disposable when they stop working, but for $10 for a small 1/4" die grinder explains why I have 8 of them with various bits already installed. They probably use 2x+ the amount of air as a real tool (like a Ingersoll Rand made in USA or Snap On etc) and not have the feel or trigger control, but I really like them. Having a compressor bigger than you (think you) need is really a good way to go.
I ran a 3 hp compressor rated electric motor at 240V on my setup, even tho the big pump called for a 5hp. 3 or 4 yrs later we are golden. Had to play with the pulley sizes to get the pump to run at it's sweet spot rpm; using a dual multi link belt setup for real high tension. HF once again - pump was $145, motor $139 IIRC.
a 16 year old hooligan stuck in a 55 year old's carcass