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Case Hardness Measurement Methods Case hardness is a measure of the resistance of a material to surface indentation or wear. Case hardness is important in many applications, including the production of cutting tools, dies, drive components, gears, and parts that are constantly subjected to wear and abrasion. This article reviews the typical measurement methods used…

When we talk about differential gaging, we are usually referring to the process of using two sensing devices and combining the results into one measurement. The measured dimension is the change in the position of the two sensing components. Differential gaging has some advantages over normal, comparative measurements using a single sensing head against a…

As a method to get inspiration for topics for this column, I go back through old documents. As one can imagine, the basics of metrology were mostly developed in the early 20th century but have been refined and controlled to get where we are today. During this exploration I realized that we are rapidly closing…

Calipers are essential measuring tools, widely used for their ease of use and 0.01 mm precision, making them a standard in the industry. Among them, digital calipers not only help prevent misreading but also serve as a key step toward IoT-driven measurement data collection. To support your precision needs, we’ve prepared an instructional video covering…

There’s More to It Than You May Think Introduction Calibration labs frequently need to certify the average roughness (Ra) of calibration specimens or samples. This seemingly straightforward task, however, involves more than running a roughness gage across the surface and reading the Ra value. Variations in basic settings can result in Ra values that differ…

Machinists working strictly in metal-working shops do not have many occasions to gage the thickness of soft materials. But many of our readers work in supporting roles, helping to build or maintain the machines that produce textiles, plastic films, paper and other products that are compressible.  Even readers who work only with metals should realize…

COLD ROOT ROLLING is the process of burnishing the root radius of a previously cut thread, in a Rotary Shouldered Connection. READ MORE ABOUT COLD ROOT ROLLING

WITH MASTER RINGS AND ENGAGEMENTS, SIZE MATTERS A master ring, or ring gage, is basically a bore of known dimension. The precision hole is often used as a setting master for variable inside-diameter gages (such as bore gages, air tooling and mechanical plug gages), for go/no-go mastering of fixed ID gages, and for go/no-go OD…

As a welding consumable manufacturer, Postle Industries take our responsibility in supporting our customers supply chain and compliance departments seriously. The most common documents required form us are a certificate of conformance (COC), and a Safety Data Sheet (SDS – formally known as an MSDS). The COC is a certificate of authenticity and quality, related…