The use of the thread gauge and maintenance

1. Use: before use should be after related inspection measuring mechanism is qualified, can put into production use on site. Should be paid attention to: when using thread tolerance grade and the deviation of code under test and the ring gauge identification tolerance grade, deviation code is the same. （ Such as m2-m24 * 1. 5 - 6 h and m2-m24 * 1. 5 - 5 g two ring gauge appearance is same, the different thread tolerance zone, wrong after use will produce nonconforming batch) 。 Inspection measurement process: first, to clean up thread being measured oil and impurities, and then the thread gauge and thread when that is being measured, with the thumb and index finger turn the screw thread gauge, screwing length of screw thread for qualified within two pitch, otherwise the sentence to nonconforming product. 2, maintenance after using thread gauge, should clean up attachments at site in time, in the prescribed measuring tool box. Production site when use, should take put down gently, to prevent damage to the measuring surface knock against. The thread gauge is forbidden as a cutting tool force screwing thread, avoid to cause early wear. The adjustable thread gauge it is forbidden to the measuring staff adjust to ensure the accuracy of the measuring tool. 3, matters needing attention according to using frequency, each year need to measure bureau of standard measurement. After proofreading plug gauge measuring error or achieve weekly inspection issue of the ring gauge measuring instruments, back by metering management personnel for the corresponding treatment measures. Adjustable thread ring gauge after adjustment, monitoring site can produce round, this phenomenon by measuring repair personnel after thread grinding measurement appraisal again, the size of qualified rear can put into use. Scrap ring gauge shall be handled in time, and may not be into the production field.