If you do not need to locate your slots accurately, don't. The whole principal here is that you should be specifying the exact controls that you need. It gives me a sloppily located but very parallel surface, which could be exactly what I want. I can tolerance the top surface of a block to +/-.050", and apply a GD&T parallel tolerance of 0.005". If this is what you want, the specification is correct. The inspector will verify that the slot lies within 0.5mm of nominal position with respect to your datums, and he will verify that each side of the slot is positioned to within 0.1mm with respect to the other side. How about you apply a profile tolerance of 1mm around both edges of the slot and a +/-0.1mm tolerance across the width? The part must conform to both specifications. The Highest Quality Slotted Spring Pins from. Easy to Install Used in Standard Drill Holes. You can apply GD&T controls _and_ +/- tolerances. Slotted Spring Pin Standard Metric Sizes ASME B18.8.4M, TYPE B.
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March 2023
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