(1) 等级的有无 ● 内螺纹用的螺纹量规等级是没有的。 ● 外螺纹用的螺纹量规区分为A级和B级,只要GR是A级B级共用的, Tolerance class on thread plug gauges is unspecified. However there are two classes (A and B) for thread ring gauges.The GR(GO) is commonly used for the A and B classes. (2) 通端和止端没有检查用和加工用的区别 Go and not go of the ISO gauge system is made with same dimentions for both inspection and working. (3) 判定螺纹环规是否合格。 GR、NR等,根据通规或止规两端的插头(GRGF,GRNF,NRGF,NRNF)来检查。 For the ISO class gauge system,the thread gauge for check fitting of the thread ring gauge is the GO and NOT GO limit type. (4) 磨损点检查的插头。 NR用的磨损点检塞规(NW)是新导入的。
New barjone wear check plug for NOT GO thread ring gauge.
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