Finishing caliper brackets down to the micron is not necessary. If you can get the bracket mounting surfaces flat to the hundredth and bolt holes to the same degree you will have a perfectly usable bracket.
The factories cast the parts, spin off a few flat spots, and send them down the line.
Sure, perfectly machined parts are pretty but these are brake parts. Function over form. The stress loads they see are easily overcome with 1018.
Mine are made from Scrapbinuim and work great.
You guys are going down the overengineering drain. Step back and think about it.
Samy, here's your homework assignment. Using a friction coefficient of .75 for the brake pads figure out the force applied on a caliper bracket. Use common values for variables such as vehicle weight, speed, and tire contact.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
