The only non aluminum metal grinder I can think of is the original steel/zinc Chromium Crusher, but since I've seen more than one new grinder with tiny metal bits sticking to the magnet, I'd say it's worth checking on a newly purchased one. After all, grinders aren't produced in a 'clean room'.
the crusher is now aluminum isnt it?
They didn't change to aluminum only. They just added a new model. The CC aluminum version is all CNC, much lighter weight, with a lot fewer teeth, and fewer, but larger holes. Personally, I like the 'fewer teeth' design. It's easier to load, and I've found little to no difference in the grind consistency.
Now though, you can't find the aluminum Crusher anywhere unless someone has one that's been sitting on the shelf collecting dust. No idea what the deal is but it looks like the CC is back to steel/zinc alloy only.
I bought a Sharp Crusher that's similar to the aluminum CC. I actually prefer it to the CC, due to the very slightly larger mesh on the screen, and it's cheaper as well-2.5" 4 pc. for $15, including shipping. It's sold by merchants-wholesale on eBay and the site linked below as well, where it's slightly cheaper (the $15 buy). Unlike most grinders, the o-ring is removeble (for cleaning), but it is necessary for grinding. I've found myself using this model a lot and I think it's the best buy in a 4 pc. I've found. The Aerospace brand sold by vapeworld is also a good deal (especially with FC discount), although one that I bought as a gift for someone last year had really rough threads. Didn't cause any problems-just a little aggravating during cleaning.
http://merchantswholesale.ecrater.com/p/3768801/25-sharp-crusher-aluminum-tobacco-herb
I guess its kinda silly to take the ebay discription as fact but does the chromium crusher have a non stick coating?
A coating means it's anodized, and it's not non stick, just less stick. I love the anodizing on MixnBall grinders-it's scratch proof unless you try to dig into the metal. Not sure how well anodizing holds up on all other brands, but the 4 pc. Space Case I bought had a good sized spot on the top edge that ran into something hard, and shiny aluminum was showing. Had to get it replaced by the vendor.