Lifter travel guide lines

[kevin1967]

I am designing a plastic part and need to place a rib close to lifter travel. Please review the attached file and let me know the tips for determining "X" dimension. I just want to create a preliminary design for tool shop approval.

Thanks in advance for your advise.

 

[bvanhiel]

You left out some room for the static steel to get to the inside of your new rib. Considering that would make your equation A>=B+2X. The 2X means you've got some steel to form your lifter and some steel to form the backside of your rib. "X" should be ~3mm and larger if you can make it so, but the tooler might be willing to go smaller.

-b