Thread gauges – for a perfect result

DIN ISO 1502 is the standard that is essential for the testing internal metric ISO threads. In modern thread production, measurements are often also made with indicating measuring instruments. In order to verify the measurement results, it is absolutely necessary to check them randomly with standardized thread gauges. The reference temperature should be maintained around 20°C in order to obtain a reliable result. Otherwise, the expansion coefficients must be considered.

Testing reliability for many years

BAER thread plug gauges and ring gauges ensure the exact dimensional accuracy of your internal and external threads. All gauges are made of high quality special gauge steel, providing you with reliable testing results for many years. Upon request, we will have your thread gauges calibrated in an independent laboratory according to DIN, ISO and ANSI standards and you will receive a calibration certificate.

Contact us. We have the right gauges for you.

Thread plug gauges

The thread plug gauge combines the thread Go plug gauge and the thread No Go plug gauge. This allows you to test internal threads with a single gauge. The Go side has a complete thread profile, which must be able to be turned completely into the thread by hand during testing. The No Go side is different - it has a shortened thread profile. If it can be screwed in further than two turns, the cut thread is not correct.

Thread No Go plug gauges

Does the actual flank diameter of the internal thread exceed the specified maximum dimension? You can reliably determine this with the calibrated thread No Go plug gauge. If you cannot screw the thread rejection plug gauge into the thread by hand by more than two turns from both sides, your thread is dimensionally accurate. The internal thread outside diameter and internal thread core diameter are not checked.

Thread No Go ring gauges

No Go ring gauges have shortened threads and must not be able to be screwed on completely. Here, a maximum of two turns applies as a guide value. The BAER No Go ring gauge checks the actual flank diameter of the external thread, which must have at least the specified minimum dimension. The external and core diameters are not tested.

Thread Go plug gauges

With the BAER Go plug gauge you can reliably test your cut or formed internal threads. Here, the so-called pairing dimension of the internal thread and the screw-in capability are checked. The thread profile of the plug gauge must be able to be screwed into the thread completely and easily by hand. The Go plug gauge is made of high-quality special gauge steel and is hardened, stress-relieved and finely ground.

Thread Go ring gauges

When testing the external thread, it must be possible to screw the full thread profile of the ring gauge completely onto the thread. The BAER Go ring gauge checks the so-called pairing dimension as well as the screw-on capability. Since the Go ring gauge wears out more quickly, it should be checked again and again with the wear test gauge. The No Go ring gauge, also called a gauge nut, is used to check the flank and core diameter of external threads. The material of the ring gauges consists of high-quality special gauge steel. This allows you to use your ring gauges for a long time for reliable thread testing. 

BAER-UNI-products – all-rounders for best result

BAER's UNI-products are characterized by their universal application possibilities and, at the same time, long service lives. We have developed material structures, geometries and coatings especially with our customers in order to produce threads flexibly and efficiently

UNIForm – Forming taps for all applications

Fast and efficient - this is how easy it is to produce internal threads mechanically with the forming tap. You can use the UNIForm-forming taps for almost all materials. Your advantage: The application is uncomplicated and the result is excellent. You have little effort and save costs at the same time.

UNITap – Taps for all applications

The unique cutting geometry combined with the TiAIN-coating makes the UNITap an all-rounder: It can be used in almost all materials and ensures optimum results. This means you only need one tap to machine all the materials you want. This saves time and costs - a real revolution in tapping.