I wish I had a copy of the complete tables I could email you, the following link is mounting and dismounting catalog that has tables in the back, but does not have all of what you are looking for. If you have any questions or suggestions regarding the accessibility of this site, please. Charles, you have some weird tolerances on there, those are very rare for bearing fits. Thank you all for your help, this has been quite an education so far but it does seem to follow a pattern and I am glad I have decided to follow up with it. I was thinking of a Text book? Now you know why I wanted to ask others, this doesnt really add up. Tabular 1 Limits for linear measures Tolerance- class Limits in mm for nominal sizes in mm 0,5 to 3 above 3 to 6 above 6 to 30 above 30 to 120 above 120 to 400 above 400 to 1000 above 1000 to 2000 above 2000 to 4000 f fine ± 0,05 ± 0,05 ± 0,1 ± 0,15 ± 0,2 ± 0,3 ± 0,5 - m medium ± 0,1 ± 0,1 ± 0,2 ± 0,3 ± 0,5 ± 0,8 ± 1,2 ± 2 c coarse ± 0,15 ± 0,2 ± 0,5 ± 0,8 ± 1,2 ± 2 ± 3 ± 4 v very coarce grob - ± 0,5 ± 1 ± 1,5 ± 2,5 ± 4 ± 6 ± 8 For nominal sizes below 0,5 mm the limit measures are to be indicated directly at the nominal measure. If smaller tolerances are needed or bigger ones are more economical, then these tolerances are indicated next to the nominal size.
An M6 tolerance on a 47mm bore should be -4 to -20 according to my book. Tabelle 3 Grenzabmasse für Winkelmasse Tolerance class Limits in mm for nominal sizes in mm to 10 above 10 to 50 above 50 to 120 above 50 to 400 above 400 f fine ± 1 ° ± 30 ' ± 20 ' ± 10 ' ± 5 ' m medium c coarse ± 1 ° 30 ' ± 1 ° ± 30 ' ± 15 ' ± 10 ' v very coarce ± 3 ° ± 2 ° ± 1 ° ± 30 ' ± 20 ' For nominal sizes below 0,5 mm the limit measures are to be indicated directly at the nominal measure. If anyone knows of a techical reference that might be more inclusive and useful I will gladly pay a little for the effort to copy and email or mail it to me. The capital H is for holes and all of those are 0 to a plus number. Are you sure you are not looking at H tolerance tables? General tolerances for form and position should be used while the tolerance principle according. Most of the tolerances use lower case but some are upper case, I dont know if that makes a difference or not.
I thought I could get a head start and educate myself at the same time. I will check out the general one you mentioned. . Could anyone offer a simpler explaination of what I am seeing. The M6 is the tolerance for that bore and is not a thread designation.
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. The other end of the shaft is 10mm h6 which should be +0,-. All tolerance limits are given in mm. General tolerances for linear measures and level squares with four tolerance classes are useful for simplifying drawings. 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 really do need some reference that I can point to for these just in case there is any problem I need some printed version of these tolerances. 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.
Any use, including reproduction requires our written permission. I didnt see where you got the -17 from, at least that would allow me to have a little more room to work. After you have used it a bit, these tolerances get easier. The chart skips over h9 for some reason. Something some engineer in training might use or perhaps a machining student might have access to? Tabular 2 Limit measures for radius of curvature and chamfer height Tolerance class Limits in mm for nominal sizes in mm 0,5 to 3 above 3 to 6 above 6 f finne ± 0,2 ± 0,5 ± 1 m medium c coarse ± 0,4 ± 1 ± 2 v very coarse Bei Nennmassen unter 0,5 mm sind die Grenzabmasse direkt am Nennmass anzugeben. It applies to the dimensions of workpieces that are produced by metal removal or are formed from sheet metal.
This part is intended to simplify drawing indications and specifies general tolerances in four tolerance classes. By choosing a special tolerance class exactly the precision level common in workshops should be taken into account. By choosing the tolerance class precision levels common in workshops should be taken into account. A bearing catalog will have a table with the tolerances. The chart skips over h9 for some reason.
A keyway has a N9 and the internal keyway has a j59. The +43 on the h9 tolerance is definitely wrong, all the h tolerances are +0 and a negative number. Your help at least lets me know where I was right and where I need to work a little harder. One of the internal bores has a M6. Anyone know of a source for a simpler explaination of these that is in english? Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers.
They are applicable for all characteristics of the form elements accept cylinders, profiles of any line or surfaces, inclines, coaxiality, position and total movement. This tolerance principles says that no opposite relation between measure, form and position tolerance exists principle of superposition. If I find some time tomorrow, I will see if I can scan my tables and send them to you. Machtool, Yes I got that too, but there are a lot of other tolerances that are not listed in my handbook. All copyright requests should be addressed to.
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. One of the external shafts has a f9 while most of the other shafts have a h9 or h6. I didnt think that correct for a shaft but that is what is in my book. It contains three tables and an informative annex with regard to concepts behind general tolerancing of dimensions. Linear Dimensions: Permissible deviations in mm for ranges in nominal lengths f fine Tolerance class designation description v very coarse m medium c coarse 0.
Tolerance class General tolerances for straightness and evenness in mm Range of specified size in mm to 10 above 10 to 30 above 30 to 100 above 100 to 300 above 300 to 1000 above 1000 to 3000 H 0,02 0,05 0,1 0,2 0,3 0,4 K 0,05 0,1 0,2 0,4 0,6 0,8 L 0,1 0,2 0,4 0,8 1,2 1,6 Tolerance class General tolerances for straightness and evenness in mm Range of specified size in mm to 100 above 100 to 300 above 300 to 1000 above 1000 to 3000 H 0,2 0,3 0,4 0,5 K 0,4 0,6 0,8 1 L 0,6 1 1,5 2 Tolerance class General tolerances for symmetry Range of specified size in mm to 100 above 100 to 300 above 300 to 1000 above 1000 to 3000 H 0,5 K 0,6 0,8 1 L 0,6 1 1,5 2 General tolerances for form and position are valid for form elements for which form and position tolerances are not indicated individually. 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. Even if it was in German I could work with the tables or have one or two locals translate for me. I am just quoting the job and I am still waiting on some answers from the company I got the drawings from. . .