Square tooth sharpening

[Dan Maynard]

I was poking around forums thinking about files and found this page from a 1994 catalog, one of the files shown is a triangular one like the one you used. They do seem to be about a third of the price of the special 'square filing' ones from vallorbe.

 

[Martin Johansson]

Hello! New guy from Finland here. 

 

If you want to try square filing without the correct file then a flat file with a rounded edge is your best bet. That type of file also works on semi chisel because of the rounded edge. It's just a bit harder to position the file on semi since you have no corner to aim at. In some parts of the world those files are called goofy files. 

 

Can I post a YouTube link? Here's an example:

 

[Dan Maynard]

Thanks for that, goofy file listed on that page I posted earlier so been called that for a while too.

[Mick Dempsey]

On 26/04/2023 at 07:55, Dan Maynard said:

I was poking around forums thinking about files and found this page from a 1994 catalog, one of the files shown is a triangular one like the one you used. They do seem to be about a third of the price of the special 'square filing' ones from vallorbe.

 

I’ve been experimenting a bit, lessening the angle of attack with good results. 
I’ll do some timing videos against a new chain when I get the chance.