I have questions all the time re basic dimensions. Our Engineers will just drop a Basic dimension on the print without any controls. When we question it we are told a. to use the main tolerance control box b. to use the tolerance on the adjacent feature or we get no answer with the 'look' that...
My current argument with some of our older engineers is showing centerlnes as datums on their prints.I know it has been an accepted practice by some over the years even though frowned upon by some others. I have explained that under GD&T it is basically forbidden. As head of QC Mechanical I...
Are there any hard rules concerning the dimensioning of draft angles on castings and forgings. We (QC) find our engineers seem to have their own rules on how to apply draft. They have a dimension that will say
+dft. and one that will say -dft. They will have in the notes; Dft. angle 1 degree...
I am in the process of inspecting some 1st articles. I am not that familiar with gear design but the gear spec on one of the prints I have doesnt seem right.I have a pitch diameter of 2.0625 on a gear that has 72 teeth and then a diametral pitch callout of 32. I thought the diametral pitch was...
On all our new prints the designers quote ASME Y14.5M-1994 in Note 1.Unfortunately most do not understand most of the rules and as head of QC Mechanical I am continually fighting with them to correct their prints before they go out to vendors. The latest is over 'Symmetry'. I have 1 engineer who...
