Tolerances

[jonnyton]

I have read the posted material on tolerances. I still do not understand how crucial of a setting it is. I need my object to have a 18mm outer diammeter to fit inside a 19mm opening. If it is too large, it wont fit. Is the default setting adequate enough for this?

[Tech2]

The difference between 18 and 19 mm is 1mm or ~.039". The default tolerance in eMachineShop jobs depends on the process selected but in many cases is .005" so there should be no problem in fitting. You can check the default tolerance in Job | Settings | Specifications.