flat files, thinner than usual 47thou 1.2mm source please

In article , Steve writes

OK, so I know naaaaaarthing, but that's never stopped me before...

Is it not possible to build up what you're making from plastic card bonded together, building the slot in?

Just an idea. And very probably a crap one... ;^)

they can put a man on the moon...... but they cant make a thin needle file.....

TYPICAL lol -- From the Keyboard of Tim Bird

Gravity is not just a good idea........ ITS THE LAW!!! How can i soar like an Eagle.... When I am surrounded by Turkeys!!!!

Joe

Use a surface grinder on a 32 tpi hacksaw blade!

Mark Rand RTFM

The message from "Steve" contains these words:

Steve You can get screwhead slotting files from

start at .35mm wide to .7mm, at £14 a time they are not cheap but maydo the job.

could you not make a file from silver steel...... file a profile onto it and harden it..... -- From the Keyboard of Tim Bird

Gravity is not just a good idea........ ITS THE LAW!!! How can i soar like an Eagle.... When I am surrounded by Turkeys!!!!

47thou > > (1.2mm), width typically .22inch (5.5mm) and length of file area 3inch > > (50mm). I usually buy the Swiss Vallorbe files from Shesto UK. > > I need to file slots of 30thou (0.76mm) gap and thus these files are too > > thick, and I need a square end to the slot, so gluing emery paper to a steel > > rule is not going to give me the square side, I need a file with a filing > > edge. Why is it that 30thou and 20 thou files are not marketed. You can get > > miniature files like needles, gorgeous !!, but the square ones are much > > thicker annoyingly ! The material I am filing is plastic kit type so > > breakage is not a problem. >

Thanks for suggestions so far, Vallorbe screw head slotters at 0.35mm (14thou) thick are nice but have triangle sides not flat sides, otherwise would be ideal. I have no tool making facilities, no bench equipment so filing profiles onto something .3mm thick is beyond me though sounds dicey ?, also I need the file sides to be 'toothed' as well. A friend has tried grinding down a flat file with some success though cross section had a pitched ground surface as opposed to flat which soon fouled the slot height. Perhaps with more precision this is the only solution ? Steve

words:

> They start at .35mm wide to .7mm, at £14 a time they are not cheap but

Another thought, would be to try using a course diamond stone to apply the roughened surface prior to hardening of a silver steel blank. If possbile, just drag the diamond across. Otherwise use a needle file, to impart it's tooth profile, prior to hardening, may also work.

Joules

I buy the Vallorbe 1mm thick jointing files and had some surface ground (professionally) down to .75 mm without a problem. They are delicate but still cut OK. It was done on a grinder with large wheels i.e. over 18" and a reciprocating action that prevents overheating etc.

Paul