| Gallery, Projects and General > How do I?? |
| Drawing Dimensions |
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| Xldevil:
The Letters H and P stand for tolerances,as said before. A very good explanation on this side: http://www.mitcalc.com/doc/tolerances/help/en/tolerancestxt.htm To get a 3H7 boring,you have to use a 3H7 reamer. Cheers,Ralph |
| mklotz:
There's something amiss here. I've never seen any Elmer's plans with dimensions in millimeters. I have his book and the plans for #25 are mostly specified as (ugh!) fractions. No tolerances (beyond the non-numerical close and smooth fits) are specified. Are you certain you're looking at an Elmer's plan? |
| lordedmond:
just had a look at Jon toms site and they are in imp fractions with one or two letters after certain parts but the letters are explained at the foot of the drawings e.g. S = smooth , alas none of my favourite MM to be seen Stuart |
| Chuck in E. TN:
My bad! Confused the drawing of an Elmer's with one from the Netherlands. It is all metric with dimention callouts like I posted before. So, the dimention Ø3H7 is 3 mm dia. reamed to H7, correct? Chuck in E. TN |
| Bernd:
I guess Marv cleared that one up. I was ask the same questions. Problem solved. :ddb: Bernd |
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