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Functional thread rolls are manufactured in matched pairs offset by one-half pitch to allow them to sit in a thread’s helical path (groove). Sometimes inspectors or machinists are unsure if they have properly positioned the rolls in the correct helical path. To avoid such issues, simply use a blue Sharpie® to draw a line in […]
When inspecting external functional size on a straight thread (ACME, ISO Metric, UN, etc.), some have a tendency to force the RG-7000 external roll gage onto a part. Keep in mind overly aggressive placement can cause the roll to move or completely slip from the part. Sometimes, this can slam the gage and/or hands on […]
Strengthen Your Quality System A solid straight thread inspection system (ACME, UN, Metric Threads, etc.) should measure all of the vital thread attributes – Functional Thread Size, Pitch Diameter, Lead, Height, and Form. By properly inspecting threads, you will minimize process error, verify exact mating and interchangeability and ultimately guarantee your quality. Gagemaker […]
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Pitch diameter is perhaps the most important element with regards to whether two parts will screw together. Pitch diameter is the distance from the pitchline to the corresponding pitchline located 180 degrees around. All threads have a pitch diameter whether they are a straight or tapered thread. However, some threads’ pitch diameters are actually measured […]
Thread form accuracy is important if two connections are to make-up properly. Using a Thread Profile Gage is a quick way to check your threads for proper form and pitch. Thread form is defined as its profile in an axial plane for a length of one pitch. Simply place the correct form into the threads and by […]
Gagemaker produces videos to aid and educate people on thread inspection and quality control. Here are a few of our more general videos: You can view all of our videos on Gagemaker’s Youtube channel. If you are unable to view our YouTube channel, please contact us directly.