So i have this semi-smooth, uneven cast block made of polyprophilene (no idea how to spell it in english), and i need to make it thinner. About 0.1mm on two sides, but not the entire sides. I want to do as little harm/modification/collateral damage as possible, as the object in question has a high collector value. What should i do? What grit(s) should i use? Should i wet sand it or dry sand it? Thanks in advance.
Taking 0.1mm off is a very fine tolerence! I suggest lapping the surfaces with 1200 grit and make sure its wet! Or shave the surface with a box cutter blade.
Yep. I'm used to it though, i studied milling at one point in my life. You often have to be 0.01mm precise with a lathe. So 1200 grit should be fine enough?
I'm curious to know if it can be sanded. PP has a very waxy quality. The material tends to roll up instead of coming off.
Yeah, it's really soft, i'm clueless myself, thus why i asked. Wouldn't be good to mess this thing up while experimenting on it.
It's something that's supposed to fit into something else but it's not willing to do so with the ammount of force i'm comfortable with using on it.
-Oops. For some reason, I had polyethylene in my head when I typed that. PP should be OK to sand, just do it wet. It heats up really easy. If it's a gun part, just say so. We won't get scared and scurry off.
That sounds ~~~interesting~~~~! john don't worry about guns too much. I have real ones, paintball guns, airsoft guns, and more Nerf guns than Toys-R-Us
^Okay then. I'm working on fitting an AKM-63 plastic buttstock to my AK-63F rifle. http://www.youtube.com/watch?v=L3zf87cP6Uk See the blue-ish green-ish buttstock on the video? That's it. Except mine is a lot more blue-ish because it's not that dirty. EDIT: Same rifle with slightly less... distracting surroundings John, i think you'll like this. I saw you mention that you don't like the AK because of the "silly wood". The Hungarian ones made in the 60s don't have any of that
na, best to shave it down with a blade, take a little off and test fit, until it slides in with a little force. (profession) prototyper in most plastics, cast or RP from Stratasys Dimension machines. Down side of teh dimension machines is the tolerence of 0.33mm so things never fit on a small scale. luckily its ABS which allows for alot of sanding, filing and swearing!
Are we invading Hungary this time? -you cheeky bugger! Most aftermarket or custom handles require a little work to make them perfect. I imagine even more so with cold-war combat arms.
You can't imagine how hard the wood buttstocks can set into the reciever in circa 40 years. Usually takes an hour or two to tap one of those out.
