Recent content by RooneyJC

Thanks Mike. Yeah I'm just talking about Delrin Acetal Resin. I assume the tolerance changes will occur due to the part cooling? Do you have any idea by how much the variation could be? The part will not be used in a sealing application, but as a spacer in an automated machine that will need to...

Hello All I need to machine a plastic piece that is rather thin with high flatness, parallelism and surface finish callouts. I was thinking of lightly thinning some stock high-maintainability Delrin. See the drawing below: http://imgur.com/igV3fsB The piece is 190mm X 100mm. Now these...

Right, functionality of the part should take the largest precedence for my application. Thanks again everyone for the help.

Thanks for the responses. I would like to leave these "half" dimensions out as they can clutter the drawing. Here's a Tec-Ease video explaining it: https://www.youtube.com/watch?v=3hCAfVgAMCA Also, do you guys also know if center-plane datums are burdensome to machinists? I feel like...

Hello, I'm detailing some parts to send out for fabrication. A lot of the parts are shaped like plates and have symmetric features. Because of this, I tend to set up my datum reference frame using the longest surface as my A datum and my B and C datums as center-planes. I was told at my first...