trochoidalpath
Cast Iron
- Joined
- Jan 17, 2016
I’m working up some semi-permanent fixture plates for rotaries and similar. My plan was to make them out of 2” thick 7075, hard anodized. I am looking for some advice about the best way to hold down things to the fixture plates. I think I am overthinking it.
My first idea was to just spot drill, drill, and tap M12 after the fixture is back from anodizing. I have heard that anodized threads can be brittle and not hold well. But then I started worrying about the thread strength.
My next idea was to put in a Helicoil, either before or after anodizing. I am not sure this would buy me much. If I do it before anodizing I have to find an oversize STI tap, if I do it after I need some zinc chromate primer?
Thanks for any tips here!
My first idea was to just spot drill, drill, and tap M12 after the fixture is back from anodizing. I have heard that anodized threads can be brittle and not hold well. But then I started worrying about the thread strength.
My next idea was to put in a Helicoil, either before or after anodizing. I am not sure this would buy me much. If I do it before anodizing I have to find an oversize STI tap, if I do it after I need some zinc chromate primer?
Thanks for any tips here!