Correct Casting Detail Drawing

Good answer. I did the same several years ago, and I found out more about mold design in one day than I did in several weeks of researching the processes.

Yes. Good advise Del (and a well earned 200 GA's, lets hope this one sticks), You would be amazed at how much, and how accurate the information you'll receive will be. They know exactly what they want to see on the drawing, so who better then ask than them directly, instead of guessing, and crossing the fingers.

Bravo!

I agree! Absolutely the best answer! There is nothing like a face to face with the folks who will be doing the fabrication (that goes for any part, casting, or machining)! Even if you got a sample drawing from someone, it is the supplier who is making it that counts most for providing proper documentation to avoid surprises at delivery. In fact, if you have documentation that was good for one vendor, make sure you run it by any new vendor you may want to use. These things can vary greatly depending on shop capabilities. And yes, be humble, be very humble.

GA from Del and PopcornWizard.

I'd just add go to the vendor you're least likely to end up using first. That way you make a better impression with the guys you are likely to use.

Kudos to the OP for a well asked question.

And Rotag, you may also want to take that machining drawing with you (assuming it is not proprietary). They may have some advice that would impact that drawing. By knowing what you want as a final product, they can advise you on the design of the casting, not just the detailing.