Thread gauges for testing internal threads
The standard for a thread limit plug gauge of the metric internal thread is DIN ISO 1502, according to which the thread gauge must be manufactured to accurately test an internal thread. In our offer you will find gauges that can be used to test a wide variety of threads. You will find the right gauge for standard, coarse and fine threads as well as for pipe or trapezoidal threads.
Thread plug gauge: With this thread gauge you can test your metric internal thread quickly and reliably. This is because this thread gauge is equipped with a standardized thread profile, which should be able to be screwed in optimally and precisely when threading. The fine grinding as well as the precise finish ensure a very accurate measurement that you can rely on. If the thread corresponds to the tolerance, the thread-good plug gauge can be screwed into the thread completely and without force.
Thread Reject Gauge: Test in a flash whether your internal thread complies with the standard. This thread gauge makes it easy and reliable. Simply screw it into your thread and test whether the pitch diameter exceeds the standardized dimension or not. This is the case if it can be screwed into the thread more than two turns.
Thread limit plug gauges: This is our two-in-one solution in thread testing. That's because this plug gauge conveniently combines a thread-gauge plug gauge and thread-exclusion plug gauge. To test your thread, simply screw the good plug gauge side into the appropriate thread. If the thread is well standardized, you should be able to screw it in completely without any problems. You can also check this more closely with the scrap side. Because if this shortened side can be screwed into your thread more than two turns, you can be sure that it does not comply with the standard and the pitch diameter is too large.
Checking external threads – the right thread gauges
Also to test your external thread, BAER provides you with the right tool. For testing external threads, thread ring gauges are an optimal choice. Again, you will find a selection for different requirements.
Thread Gauge Rings: This thread gauge should be able to untwist completely on a thread that complies with the standard. However, the wear of this tool should also be checked regularly for best results.
Threading Scrap Ring Gauge: Unlike the Good Ring Gauge, this threading gauge is shortened. This means: In this case, the ring should not be able to be unscrewed by more than two turns. If it exceeds this dimension, the thread is too small and does not correspond to the dimension and standard it should have.