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| Lew_Merrick_PE:
--- Quote from: Chuck in E. TN on December 03, 2011, 04:08:39 PM ---It is all metric with dimention callouts like I posted before. So, the dimention Ø3H7 is 3 mm dia. reamed to H7, correct? --- End quote --- No, ø3H7 = ø3 +0.01/-0 mm. In inches, the dimension would read: ø.1181 +.0004/-.0000. A 7 class of fit for an ø3 part gives a 0.01 mm tolerance band (IT) and a minimum diameter of 3 (mm). Yes, you can probably accomplish that with a reamer, but the designation does not specify how the hole is to be made. |
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