Slightly OT, but I like the one labeled "Pimp Den China Drill". Your German doesn't have to be great to understand that one.

I made a similar depth stop collar for the last drill I had. I now have one that works off the handle shaft.
Think about where you see brass used on commercially produced goods - and where it is conspicuously absent. There's often a good reason (beyond price) for the use of a particular metal.
I had some unknown bronze that I machined a while back for my bandsaw repair... which I really need to finish. Maybe it was how I was going about it, but the stuff seemed to be very hard and resist machining. I suspect that it will be very long wearing in the gear box.
-Sparky