Michael A. Terrell wrote in message
m...

N_Cook wrote:

Seem to have to do this a lot these days. I'm hinking of converting one
of
these neat little pipe/tube cutters to roll on a spline form.
http://image.bizrate.co.uk/resize?sq...5102&mid=82383
the only pic I could find , a smaller version of these
http://www.choiceful.com/prod_image/66677_l.jpg
by changing the sliding-in cutting wheel to a toothed cog.
Currently I do this spline conversion by thin grind wheel and cutting
splines freehand , so rough and ready, does the job, but not very
elegant
and wary of breaking the thin Dremmel type grind wheel.
I cannot even find a brass gear to fit in there for proof of concept,
let
alone a steel cog. Anyone know where to look for a steel cog with about
1mm
pitch of teeth , between 10 and 24 mm diameter and between 3.5 and 5 mm
wide. I don't mind sawing and grinding out the slot that takes the
roller on
one of these pipe cutters. Where would I find such brass or steel cogs
in
some application that could be robbed out. Not much of the shaft needs
to be
splined and remainder of shaft could be undercut to clear knob and still
engage well enough for finger pressure.
Or any other ideas ? I have a ball race that would fit in there neatly ,
after widening the slot but would havre to grind teeth to the outer ring
of
the race. I'm aware of engineering slit saws and may even be able to
justify
the cost of one, but would rather try a proof of concept first


Try asking on the right newsgroup: news:rec.crafts.metalworking


--
And another motherboard bites the dust!

The last time I was there it took ages before someone came up with the name
of the machining process for the step and repeat chiselling for forming
those large aluminium heatsinks, found on domestic amps of the 80s, with
those distinctive curved fins, - its called skyving.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/