- Joined
- Jun 26, 2014
- Messages
- 619
I had some old second hand files and I tried the soaking in sulfuric acid (battery acid from the auto store) trick to sharpen them up on the weekend. Worked surprisingly well so I'm pretty happy with that.
Then I got to thinking (dangerous), I also have a lot of old taps and dies I have picked up over the year - imperial stuff I normally only use to tidy up existing old threads or cut the old one to match an existing part (anything I build from scratch would use metric threads and I have good sets of new taps and dies for those). Would soaking in acid sharpen those up to? Anyone see a reason not to give it a try?
Then I got to thinking (dangerous), I also have a lot of old taps and dies I have picked up over the year - imperial stuff I normally only use to tidy up existing old threads or cut the old one to match an existing part (anything I build from scratch would use metric threads and I have good sets of new taps and dies for those). Would soaking in acid sharpen those up to? Anyone see a reason not to give it a try?