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Learn How to Tolerance Circular Runout in GD&T

Jan 17, 2017   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments

I just uploaded another installment to our Free GD&T Tutorial, and this article explains the Circular Runout symbol.

circular runout gd&T

Circular Runout tolerance on a drawing…

Circular Runout is a fairly common GD&T symbol.

Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much CNC work, you’re bound to come across a drawing with GD&T symbols on it sooner or later.  The good news is they’re not hard to understand and we’ve put together a quick mini-course to help you get up to speed.

One of the things I find about GD&T, is that if you’re a visual/spacial thinker, it makes more sense because the symbols have what’s called a “Tolerance Zone” that is an easy visual image to conjure up.  I find that very comforting.

We recently ran a CNC Skills Inventory survey and found that 55% fo survey respondents use GD&T.  That means it’s an important piece of knowledge for CNC’ers that you wouldn’t want to be without.  Go ahead and try the free course.  It’s short and you’ll learn a lot quickly.  I recommend just going through it a chapter a day or so.  There’s also a quick reference guide to the symbols that’ll give you a quick idea of what’s going on and what’s possible.

 

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Learn How to Tolerance Circular Runout in GD&T
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