Limit gauge that includes plain limit gauge, thread gauge and taper plug gauge, which is widely used in the field of measuring devices in industrial production. Precision and abrasion in use can be directly affect the product quality. Limit gauge has high requirement not only at dimension accuracy, but also at geometric tolerance.Such as plain limit gauge, it need to measure the straightness and roundness. At present, we use the contact method of measurement to measure the high precision part. But there is a lot of shortcomings, such as slow speed,wearing fast for detecting instrument and high demanding for measure worker's technical level.
The instrument can be measured the diameter of the plain limit gauge, straightness and roundness, Pitch diameter, pitch and thread angle of thread gauge, Taper of cone plug gauge, meanwhile it can be measured high precision type of axle part. Competitive advantage, such as high measurement precision, high fast measurement,non-contact direct measurement without abrasion and so on. This is an ideal measuring instrument for limit gauge that is contains car, NC machine tools, aerospace, military industry products high precision in the type of axle part.