I want to make some wooden screws (threaded rod) for several projects
and would like some input from anybody that has done this on what
material you used.
What is the preferred wood to make these from? I have one in a shop
stool I made but it tends to warp slightly depending on the humidity.
Would it be better to use a single straight grained piece or turn the
dowel from glued up stock to reduce the tendency to warp?
Ideally, you want a very close-grained and dense wood for thread-cutting,
for example Box. A glued-up blank might make it a bit more stable if it's
going to live in an environment with large RH changes, but otherwise
well-seasoned straight-grained stuff will do fine.
<BRuce> wrote in message
On Sun, 07 Mar 2004 08:47:32 -0500, BRuce <BRuce> wrote:
How big ? What pitch of thread ? How much force ?
For small stuff, box is good. Applewood and other slow-growing
fruitwoods are excellent, if you can find a piece big enough. Ivy is
another good one, if you can find it. Even holly might be worth
trying. For big ones (like vice screws), it depends on your local
availability. Beech is pretty good (my local choice) but I'd guess
hickory is worth a look too. The right hard grade of maple is another
Lignum vitae is very good, especially for nuts. It's strong, wears
well and is self-lubricating. It's also endangered and unavailable -
however sacrificing an old mallet to make the nut for a new workbench
or cider press isn't unreasonable.
Ash and oak are poor choices. Oak tends to be brittle, ash wears
I've had to make threaded dowel and matching nuts in a lot of different
species and sizes, haven't had any comebacks. As long as the stock is dry,
stable and straight grained, you shouldn't have a problem.
Lee Valley sells an american made jig, for threading and tapping...works
great after some trial and error.
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