Go-no gauge is used to test the inner hole diameter of cylinder. If the go end can go through the measured hole and the no go end can’t, hole diameter of the measured workpiece is qualified; if the go end can’t go through the measured hole or a part of the no go end can go into the measured part, hole diameter of the measured workpiece is unqualified.
Scope of application:
Suitable for workpieces of which only the inner hole diameter need to be measured
Suitable for measurements of through hole, blind hole, step hole and semicircular hole (more than 180°)
Only used for measurements of parts of which hole diameter tolerance is more than IT8.
Three-color go-no gauge design standard & three-color go-no gauge with seam allowance design standard:
The corresponding standard handle is selected according to the different sizes of the basic size of the measured diameter;
The dimension of the connecting part of go end and no-go end and the work parts shall be designed according to the standard;
Diameter of the work part of the go end and no-go end shall be determined in accordance with the national standard GB1957-2006 Smooth Limit Gauge Technical Condition;
Shape error and surface roughness of the go end and no-go end shall be determined in accordance with the national standard GB1957-2006 Smooth Limit Gauge Technical Condition;
Three-color handle go-no gauge handle standard:
Handles of three-color handle go-no gauges are divided into five types according to the basic dimension of measured diameter;
Choose the only matched handle for the three-color handle go-no gauge according to the basic dimension of measured diameter;
Dimension of the handle is made in accordance with the standard;
Handles shall be clearly marked with the number and size of gauge and how to distinguish the go end and no-go end;
Handles shall be printed with fixed color to distinguish the go end and no-go end; standard: go end nut is green; no-go end nut is red; middle handle is golden.
