![]() ![]() Anyone know of a source for a simpler explaination of these that is in english? Machtool, Yes I got that too, but there are a lot of other tolerances that are not listed in my handbook. Most of the tolerances use lower case but some are upper case, I dont know if that makes a difference or not. A keyway has a N9 and the internal keyway has a j59. One of the external shafts has a f9 while most of the other shafts have a h9 or h6. Could anyone offer a simpler explaination of what I am seeing. The parts are shafts and couplings and have to fit bearings so I know some of the tolerances are going to be plus and some are minus. I do not have a full copy of the DIN but I do have some notes and a brief discription of how the tolerances are supposed to work but I still dont quite understand it. I have some drawings from Germany that use the DIN 2768 tolerances and I am having trouble understanding it correctly. The system of tolerances and fits ISO can be applied in. ISO Tolerances for Holes(ISO 286-2)- 3mm to 400 mm. ISO 2768 is mainly for parts that are manufactured by way of machining or removal of materials. ISO 2768 and derivative geometrical tolerance standards are intendedto simplify drawing specifications for mechanical tolerances. Variations on dimensions without tolerance values are according to ' ISO 2768'.Runout Related Mechanical Tolerance Design Data.ISO 2768 The following are general geometrical tolerances per. ![]()
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