Threading Technology – Clamping Technology 520

468 Thread Gages UNC UNF UNS M MF Rp, R, Rc NPT NPTF STI SELF-LOCK G (BSP) Product Finder Smooth GT, TD Accessories Calibration Tech. Info 6.1 General information Gage systems are specified for the respective types of threads for the purpose of securing an unlimited exchangeability of workpiece threads. The following basic principles apply: 1. The manufacturer must not supply a workpiece thread the actual thread size of which is outside of the specified limits (e.g. pitch diameter or mating pitch diameter). 2. The buyer must not reject a workpiece thread the actual thread size of which is inside of the specified limits (e.g. pitch diameter or mating pitch diameter). In modern thread production, there are of course other inspection methods also, e.g. measuring with dial-type measuring instruments. Whenever other methods are applied it is important to make sure that the same results are achieved. In case of doubt, the gages recommended in the respective standard will decide the inspection result of the thread to be examined. If the inspection work in production is done mainly by measuring, it is still absolutely necessary to perform random sample inspection with the standardized gages. The reference temperature for the gage and workpiece dimensions is 68 °F (20 °C). If inspections are done at other temperatures, the corresponding expansion coefficients have to be taken into account. 6.2 Precision fixed limit thread gages EMUGE’s comprehensive line of thread gages consist of GO/NO-GO plug gages and thread depth plug gages. Gages inspect the pitch diameter and functional thread for internal-threaded components. Features: • Exceptionally hardened tool steel and highly accurate • Full range of inch, metric sizes in coarse, fine, UNC, UNF, UNS, NPT, NPTF, along with EMUGE SELF-LOCK threads forms • Accommodates 2B, 3B, 6H classes of fit • Stable thread start for easy insertion • Eliminate thread damage in demanding environments • Short Form Certificate of Accuracy is furnished free with each gage, Long Form Certificates are available upon request Gage certification is performed by accredited calibration service “DECOM UGK GmbH” calibration laboratory