Product and Technical Support Resources

10% Rule The 10% Rule is intended to assist in the selection of the tolerance for Go & No-Go gages. The premise is; if you surrender 10% of the total product tolerance to the gages, you will pass 90% of your product tolerance 100% of the time, if the Go fits and the No-Go does not. Go Plug Gage Using the minimum diameter of the hole as the Go and applying the tolerance PLUS insures that, if the Go plug goes through the hole, the hole is larger than the the minimum diameter. if the tolerance is applied minus on the Go , it is possible to accept product below the minimum stated diameter. No-Go plug Gage Using the maximum diameter of the hole as the No-Go and applying the tolerance MINUS insures that, if the No-Go plug does not enter the hole, the hole diameter is smaller than the maximum diameter of the hole and in tolerance. If the tolerance is applied plus on the No-Go plug, it is possible to accept product above the maximum diameter of the hole.