Standards Wednesday - Limits of Size

Posted on September 17th, 2008 in Dimensions, Drawings, Standards by The SW Geek

Don’t you just love Wednesdays? Monday is a distant memory, Friday is just in sight and of course…Standards Wednesday. If you have never heard of Standards Wednesday…where have you been? On Wednesdays, I try my best to break down different standards and specifications that impact our daily life as engineers, designers and drafters. For the past few weeks we have been taking a detailed look at ASME Y14.5-1994, and this week is no different. Today we will get knee deep into Section 2.7, Limits of Size; try not to get any on your good shirt.

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Standards Wednesday - Tolerance Accumulation

Posted on September 3rd, 2008 in Dimensions, Drawings, Standards by The SW Geek

We are back this week with some more ASME goodness after taking a short break. This week is all about Tolerance Accumulation per Section 2.6 of ASME Y14.5. You maybe asking yourself right now, “What is Tolerance Accumulation?”. Tolerance accumulation, or tolerance stack-up, is the dimensional variance between two features of a part based on the tolerance range of the intermediate dimensions. How you apply dimensions and tolerances to features on a part can have a huge effect on the finished part. Today we will look at some simple parts and how different methods of dimensions can give you dramatically different results.

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Standards Wednesday - General Tolerancing Pt2

Posted on August 20th, 2008 in Dimensions, Drawings, Standards by admin

Last week I started covering Section 2 of ASME Y14.5-1994, General Tolerancing and Related Principles, with the post Standards Wednesday - General Tolerancing Pt1. This week we will continue to explore this section of the ASME Y14.5 with Section 2.3, Tolerance Expression; Section 2.4, Interpretation of Limits and Section 2.5, Single Limits. Section 2 is a pretty hefty section and it will take us a few weeks to go through but we really need to cover it before we move on to GD&T.

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