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krv3000:
hi all i came a Cross this in a old engineering book of haw to resharpen old files so i decided to give it a go and see wot hapens SOS no pics of before but will post pics of the after right i went throw me old file collection and got a good selection of files I first gave them a gowning over with a file card its a proper wire brush for cleaning files then i put them in a large plastic tray and then put in me battery acid after 8 awers of soaking i drained off the acid and gave them a good scribing with ruining water and a nale brush well they cam out like new dried them off and gave them a bathe in paraffin their was two relay grotty files so i have let them soak over night and i will see wot has hapend to them when i get back home

krv3000:
Hi all as promist sum pics you can just make out the file siting in the tub all the crap on the top came off the other files right her are the pics

Deko:
Well they all look very nice and clean, but how do they cut. :scratch:

Cheers Dek

krv3000:
hi all cut well i tested them all on brass then tested sum on steel they cut like new

Fergus OMore:
Bob,
There's a whole heap of stuff on the subject. Mostly Hydrochloric acid was the stuff used.
Basically, it and phosphoric acid make a really useful rust remover on things like car panels.
Again, it is the stuff that is used to clean mortar , concrete and bricks as well so it is still available widely.
OK, moving on! I think that it is generally agreed that acid 'sharpening' is one way to get the best out of clogged up and rusty files but eventually, the teeth of files are bound to be worn away- end of story, I'm afraid.

Of course, it isn't the end for usefulness and the better( non case hardened) files make very good form tools for the lathe. Somewhere- somehow, I have photos of the files that Dennis Chaddock ground up to turn ball handles for his Quorn tool grinder.

Regards

Norman

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