Gagemaker’s external and Internal Thread Taper Gages (ET-7000/IT-6000) inspect variations in connection taper of threads ranging from 1½ - 24 for API threads. Use the ET-7000 series to inspect external tapers. Use the IT-6000 series to inspect internal tapers. Each model covers a specific range of connection sizes.
The ET-7000 and IT-6000 gages utilize precision contact points that seat in the thread of the part. Actual measurement readings are displayed on the gages indicator. Each gage is supplied with .072 diameter contact points. The contact points are interchangeable so that different thread forms can be measured. Contact point diameters have a tolerance of +.0002. The pitch or lead of the thread and type of thread form determine the contact point’s diameter required for taking measurements.
Setting masters are not required to set taper gages. The contact points are seated in the threads of the part. The largest indicator reading is obtained by sweeping the thread taper gage. Variations in taper can be detected by taking measurements in two different locations one inch apart, along the length of the thread.