![]() I thought I could get a head start and educate myself at the same time. I am just quoting the job and I am still waiting on some answers from the company I got the drawings from. I just need to find a better source and I am hoping to not have to buy all the standards if I dont have too. 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. Variations on dimensions without tolerance values are according to 'DIN ISO 2768- mk'.The latest DIN standard sheet version applies to all parts made to DIN standards.
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