Been told I need to "stone" my lock pieces, to remove any machine markings and smooth them out. Make everything work better.
"Don't take off any metal, but get them smooth as a baby's bottom."
Okay, so once I figure how to take the lock apart and put it back together, what's the best tool for this?
I really don't want to use a wet stone or whatever. Can't I just use high grit sandpaper or a metal file?
Also, when I remove the mainspring with a mainspring vice, can I take the vice off and completely remove tension on the spring?
Thanks for the advice, fellas!
Depends what you’re working with.
For a machined lock that isn’t finished, i start with small files lightly filing the surfaces. My cuts are lubricated with mineral oil
Starting with 2nd, 4th then moving up to 6 and 8 cut needle files, each higher cut removes less material. I try to use light pressure, this is especially important when filing around corners and notches.
To smooth area’s i use fine diamond files and polishing stones, again lubricating with mineral oil.
I check the parts over to ensure all file marks are removed and the surface is cleanly finished, i polish up to 600 grit.
Once i get to the desired finish, i clean the parts off in a rotary tumbler with stainless steel 1 and 2mm shot and burnishing compound, i do this for the internal parts only.
The plate, frizzen and flintcock I polish with a fine wire wheel or often called a goats hair wheel, this blends the finish giving it a nice satin look.
If I’m case hardening the parts are polished as fine as i can get them before the hardening process, up to 800 grit sometimes 1 micron.
The stones you should be using a whetstones, the come in various shapes, pretty cheap from a jewelry supply store. The ones on amazon generally stink, and break easily.
Somtmes they’re called die makers stones.
You can polish with abrasives like aluminum carbide paper, however it generally doesn’t last very long.
Pumice and rotten stone mixed with wax on a chamise cloth works well too.