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Thank you very much for your detailed responses. Whether I designate both pins as datum A or A for one and B for the second, how do I demand that both pins must be tangent to the V-groove surfaces?

Hi, This is an ASME Y14.5-2009 drawing. The two cylinders should be parallel and exactly spaced.

Hello, I need some help with a part that consists of 2 V grooves which I want to determine as datums. Both 36 diameter pins should be the primary datum. The dowel holes must be perpendicular to the plane that connects the pin's center lines. I am not sure on how to even start. Any assist...

Hello drawoh, thank you for your answer. While the part is conected to the secondary datum with two points, can't it still rotate about the axis connecting these points? If so, it will be perpendicular to datum A but not necessarily to datum B. What am I missing here?

Hello, Please review the attached picture. The green surface must be perpendicular to the red surface, datum A, and to the blue surface which is datum B. Datum A is perpendicular to datum B. Which of the tolerance options is the correct one? Is it enough to ask for perpendicularity to one of the...