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Bob UK.
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Posted From: 94.197.120.203
Posted on Monday, 02 March, 2015 - 11:20 am:   Edit PostDelete PostView Post/Check IP

BS 308 is the standard for engineering drawings. This allows other engineers to unambiguously under stand the drawing.

Old cars often need bits to be made. I always do a detailed 308 drawing. I use a rule and compass etc.

Tolerances. The tighter the tolerance the harder it is to make. So leave generous plus or minus 15 thou. And tighter on hole positions etc. 5 thou for general chassis stuff.

If the bit is to be made elsewhere then 308 is a must. With own stuff one can take liberties, 308 is easy to understand and naturally intuitive to learn and adaptable. So no excuse not to start the job right.

Google 308.

(Message approved by david_gore)

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