Gauges are scale-less inspection tools. A limit gauge is not a measuring gauge, they are just used for inspection purpose. Two sets of limit gauges widely used for checking limit of dimension of various parts. There are two gauges : 'GO' limit gauge, and 'NOT GO GAUGE'.
'GO GAUGE' should pass through or over a part while 'NOT GO GAUGE' should not pass through or over the part.
1. Go Limit:
The GO limit applied to that of the two limits of size corresponds to the maximum material condition i.e., (1) an upper limit of shaft, and (2) the lower limit of a hole. This is checked by GO gauge.
2. Not Go Limit:
The Not Go Limit applied to that of the two limits of size corresponds to the minimum material condition, i.e., (1) lower limit of a shaft, and (2) the upper limit of a hole. This is checked by the Not Go gauge.
