linear tolerances of ASME y14.5M 1994

[rpmengineering]

Hello anyone,
I don't want to buy the whole spec just to find out what the tolerance charts say.
I have a dim that specifies 35.0mm. The tolerance is specified in accordance with the 1994 spec, but none of us know what the +/- tolerance is under the spec.
Can anyone please help?

 

[ctopher]

Tolerances are what you need. They will not be in a spec ... unless it is a thread, drill or something general.
If your part has a 35.0mm dimension, it is up to you to figure out what the tolerance needs to be in relation to its mating part.

Chris
Sr. Mechanical Designer, CAD
SolidWorks 2005 SP0.1

 

[rpmengineering]

So there is no general tolerance chart like the ones given for fits and such in the ASME spec? I know the iso spec defines tolerances for ranges of dimensions. I am not designing this part, I'm trying to figure out what the manufacturer of this part intended for a tolerance on this dim by applying the general ASME y14.5M 1994 spec. I thought there was a chart that says something like dimension 0-6mm has a tolerance of +/-.05mm and so on.

 

[ctopher]

There are tol charts for drills, threads, etc. But not for general dimensions. Your tolerance should be called out on the dwg somewhere. If not, you need to contact the originator of the dwg.

Chris
Sr. Mechanical Designer, CAD
SolidWorks 2005 SP0.1

 

[MadMango]

There should have been some form of tolerance call-out, either hidden in the title block of the drawing, or in the general notes area. If not, then I would contact the design house and ask them what they require.

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[ewh]

ISO does cover tolerance ranges, but ASME Y14.5-1994 (I am assuming this is the standard you are refering to) does not. The tolerancing refered to in its title is geometric tolerancing and how to apply it. If this is the standard you have to follow, then I agree with ctopher and MadMango. The tolerances should be specified somewhere on the drawing.

 

[rpmengineering]

Thanks everyone for the input. Its been so long since I had to follow the ASME spec, I couldn't remeber if there was the same chart as iso or not.
Thanks again.

 

[gmarken]

There are charts that refer to standard tolerances for hole size depending upon the application. ANSI has standards for running and sliding fits, clearance locational fits, etc denoted as Class RC 1, or RC 2, etc again application dependent. There is also ANSI B14.2-1978 that lists tolerance grades for metric holes like you were asking about. So if you know what the intended application of the part, you can apply these tolerances.