|
Posted by Mark Rand on October 5, 2006, 3:33 pm
Please log in for more thread options
On Thu, 05 Oct 2006 01:06:51 +0100, Boo
>The problem is I want them to be thicker in the middle than at the ends. But
>they are pretty thin anyway (say 5mm in the centre, tapering to 3mm at the
ends)
>and they are around 200 mm long. This means that any attempt to taper turn
them
>is doomed because you can't use the normal travelling steady on a taper, and
>they are so thin they'll just bend.
>
If you really must have rods that are thicker in the centre than the ends, how
about:-
Start with 5mm (3/16") 22-20SWG wall tube.
Make a pair of slightly domed, smooth rollers for a scissors type knurling
tool.
Swage the tube down with the rollers on the lathe. Adjust the rollers by hand
as you traverse along the spinning tube.
Might not be worth the hassle, and might not work, but you don't know until
you try :-)
Alternatively, run solid bar in the lathe, use a garden sprayer full of white
spirit for swarf removal and just and hold a bit of 120 grit wet and dry paper
around the bar until it is of the shape you want. It probably wont take very
long at all.
Mark Rand
RTFM
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
>move back while at the same time the steady moves in the opposite direction ?
>(ie the tool and steady either move closer, or further apart).