2018年4月6日 · This is more a general engineering question but since we use Inventor I'm thinking this is a good place to start this conversation.  My previous employer did all Imperial (inch) dimensioning and my current employer does all metric but they both have the same issues.  When we do a drawing our standard title block has defined decimal …

2008年1月8日 · So you can’t simply have a 10mm rod with a block tolerance of +-0.1 by putting 10.000 which limits the usefulness of the block tol. In the UK where I worked we had a single block tolerance that didn't vary by decimal places. Typically this was +-.25 although we changed it to suit the drawing.

2012年9月10日 · I was hoping tunalover would repsond to this as he is the one who gave the example of the tolerance block. I know on the face of the drawing the number of decimal places for the tolerance must be the same as the dimension for inch units. I wanted to know why he thought it was ok to do this in the tolerance block as our Canadian operation has ...

2011年2月24日 · I have been in design/drafting and engineering for 35 years and using GD&T ASME Y14.5 for just as long. Now, at my current employment, they are not putting a tolerance block, or material block or a 3rd angle block. They put the tolerance block on a drawing if there is a dimension that needs a tolerance. Same for material and 3rd angle projection.

2014年7月11日 · Neither has precedence. All elements of a drawing are coordinated, and if there is a mismatch then it needs to be repaired. Normally only a title block general tolerance will be on the drawing, with a note that it applies unless otherwise specified. Then individual dimensions will have individual exceptional tolerances applied.

2001年3月6日 · Even though it does not have tolerance or a tolerance block on the drawing. - I think removing or renaming the BASIC callout is the best solution and adding a note explaining what the dimension is. As for Item 1 - Does anyone have any documentation that says that ANSI allows for a broken out section view to be in a detail view?

2007年7月18日 · hello again - the drawing i have made is one drawing & i have added dims. to show on my 1st surface to remove 3mm to start the machining - all other dims. are for machining & casting - the tolerance block on our format shows for fabrication a tolerance of +/- .015 (.4 mm) - for machined dims. +/-.005"

2009年9月11日 · My company designs everything in metric & we have default tolerance blocks on every drawing. We just use a single value for linear dimensions & one for angular dimensions. Problem solved. I hate the ISO default tolerance blocks where if your part changes from one size group to the next the tolerances jump up or down.

2020年8月31日 · Every different kind of drawing has its own GENERAL TOLERANCES NOTES that override the general titleblock's general tolerances. Also, on machined parts and weldments/assemblies all 'critical' dimensions get tolerances shown on the dimension (e.g., ø2.1875" +.0025/-.0000). And if it's a press-fit, that's also stated on the dimension tolerance.

2011年1月13日 · For a cylindrical feature, is a diameter tolerance of +/-.001" the same as +/-.0010"? I always said no. That the tolerance with 4 decimal places would require a measuring instrument with better discrimination (resolution) to measure. Any thoughts? I often see general tolerances in the title block specified as .XX +/- .010, .XXX+/-.005, .XXXX+ ...