I looked in the machinist handbook and the book states a no-go gage (not-go) should not enter more than 3 turns. And "excessive force" should not be applied. Well, I rejected parts internally that I got the NO GO gage to go 6-8 turns. ( I had oil on both hands from sorting the parts). Other inspectors says if you feel any drag at all you stop so I want your opinions or facts (any torque spec on this??) Right now this is subjective so we are both right and wrong. Would just like some clarity from other professionals.

Any input would be great or information.

Thanks,

Right now this is subjective so we are both right and wrong.

It is always subjective.

From dealing with pipe plug threads, some folks want NO entry, some limit the force, some crank the daylights out of it until they wear out the gage prematurely. BUT - to be fair, whatever the criteria is for the no go gage, it has to be the same for the go gage or you are artificially reducing the tolerance.

It depends.

Best final answer: How does the customer do it?

The customer is the ultimate answer, but I am afriad to open a can of worms without having some standard internally and information to support our actions.

I guess I am suprised how hard it is to find a "standard" force. Subjectivity is like opinions and we all know what they say about opinions.:biglaugh:


Thanks

I have always based the No-Go thread gage to not go more than 3 complete turns with no drag would be acceptable. But as Bob said, it is subjective.