I contacted Taylor Hobson because that's who we bought the unit I'm using from and they said 2% if same operator using both units and everything else is exactly the same and 5% if operators are using the same units, spec and trace.
So I wondering how much it would be for different units, I know our other labs they don't even make it anymore.

Running a search for Gage R&R might be useful.

For example, here is a handy introduction to the subject (complete with a link to a spreadsheet)

http://www.dmaictools.com/dmaic-measure/grr

Thanks for the feed back.

You haven't specified what unit or test, Cosmoe615.

My lab is using a Taylor Hoboson S-116 not sure what the supplier of our parts is using.

So it's a roughness testing unit?

Yes, the S-116 a smaller type unit for measuring surface finishes about the size LxW of a kindle