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eung

Finding Dimension on Drawing

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eung

I need a bit of help with finding this dimension. (See red line)

 

Thank you in advance!

im1.png

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rkent

Knowing that dimension is irrelevant, the machined face is dimensioned and at a 30 degree angle.  You should assume 90 degrees from that face to the top cylindrical shape.  So you can find the top of the arc, draw 90 degrees from that face to where it intersects the top flat surface.

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lrm

Easy to solve graphically as rkent outlines or with trig:

tan(30°) = (20 + 22)/ x   or     x = 42 / tan(30°)  = 72.7461

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