5/2/2021 0 Comments Iso 2768 Hole Tolerances
I didnt see where you got the -17 from, at least that would allow me to have a little more room to work.
2768 Hole Tolerances Full Copy OfI 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.2768 Hole Tolerances Plus And SomeThe 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.Could anyone offer a simpler explaination of what I am seeing. One of the external shafts has a f9 while most of the other shafts have a h9 or h6. Most of the tolerances use lower case but some are upper case, I dont know if that makes a difference or not. Anyone know of a source for a simpler explaination of these that is in english Charles Mark McGrath Diamond Join Date Mar 2002 Location Scotland Posts 4,232 Post Thanks Like Likes (Given) 1019 Likes (Received) 471 The internal bore with M6 sounds like its threaded M6 x 1.0 pitch. Are the other tolerances not in Machinery Handbook Hot Rolled Join Date Sep 2002 Location New Milford, CT Posts 565 Post Thanks Like Likes (Given) 0 Likes (Received) 4 A bearing catalog will have a table with the tolerances. You can also find everything you should need here at this link Basically, a small letter is the tolerance for a shaft and a captial letter is the tolerance for the hole. The M6 is the tolerance for that bore and is not a thread designation. The tables write the tolerance in micrometers, or the number given 1000 is the tolerance in mm. Reason: clarified info Aluminum Join Date Dec 2007 Location schoten belgium Posts 207 Post Thanks Like Likes (Given) 24 Likes (Received) 26 about the din 2768 i think its a standart in europe over here can give you a ling to the table with all the seizes but its a dutch chart but i cant look it up atm but basicly its 0-3mm -0.05mm 3-6mm -0.1mm 6-30mm -0.15mm and so forth the h6 is for a schaft for example 25.4mm h6 would mean 25.4mm-25.387mm if you pm me the seizes you want to know i can give you the dimensions in metric later this evening. CBlair Diamond Join Date Sep 2002 Location Lawrenceville GA USA Posts 6,162 Post Thanks Like Likes (Given) 680 Likes (Received) 1309 MBensema, Thank you for that link, it doesnt offer everything I need but it does come closer than I had gotten by myself. I do have a shaft dimention that is not on the chart, it is for an OD 12mm h9. The other end of the shaft is 10mm h6 which should be 0,-.009 if I read the chart correctly. Charles CBlair Diamond Join Date Sep 2002 Location Lawrenceville GA USA Posts 6,162 Post Thanks Like Likes (Given) 680 Likes (Received) 1309 Diamond Join Date Jun 2004 Location Melbourne Australia Posts 5,458 Post Thanks Like Charles The chart skips over h9 for some reason. This link often gets put up with questions about ISO tolerance. It gives 0 -0.011 or 11.989 12.000 Regards Phil. ![]() 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. I am just quoting the job and I am still waiting on some answers from the company I got the drawings from. I thought I could get a head start and educate myself at the same time. One shaft has a dim 25mm f9, a bore is marked M6 and to me that seems super tight, more than the part requires but I am hoping I just read the chart wrong. There are keyways and snap ring grooves and I just cant seem to find all the information I was hoping for in the MHB but I will keep searching. Charles Hot Rolled Join Date Sep 2002 Location New Milford, CT Posts 565 Post Thanks Like Likes (Given) 0 Likes (Received) 4 Charles, you have some weird tolerances on there, those are very rare for bearing fits. I have an ISO Tolerance book my company published, but it looks like it is not available any longer. Is the M6 hole tolerance also 25mm If so, it would be -4 -17 By the way, DIN 2768mk is a general tolerance table that provides the tolerances for anything that is not toleranced on the drawing, it does not refer to the diameter tolerances you are asking about. CBlair Diamond Join Date Sep 2002 Location Lawrenceville GA USA Posts 6,162 Post Thanks Like Likes (Given) 680 Likes (Received) 1309 Thank you, I just found the tolerances on the keyway, and no the M6 is on a 47mm bore which makes me wonder why so tight a tolerance, I was hoping I was reading it wrong.
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