Another design from Mt G. Gray. Following on from his lathe-mounted bandsaw this is a neat design for a filing machine that can also used with fretsaw blades. It first appeared in issue 12 of Model Engineers' Workshop, August/September 1992 – more details can be found by looking up this issue in the online archive.
If anyone is not happy with files cutting on the upstroke then the method I adopted for modifying standard files, for use on my filing machine, could easily be used for modifying needle files.