"doozer" wrote in message
news
an.2005.10.27.13.22.45.728932@crazysquirrel. removethisbit.com...
Hi folks,
My latest project is to build a foot powered wood working lathe but there
are a few points that I am having trouble with design wise and I would
appreciate some advice.
I'm fairly good at working wood but I have very little experience working
metal. There is, unfortunatly for me, two bits of the lathe that I think
have to be fabricated in metal - the treadle mechanism and the head / tail
stock.
I think I can probably muddle my way through a design for the head / tail
stock (I was thinking of using a drill chuck or something similar) but the
treadle mechanism has me stumped.
The current plan was to have something like this (excuse the bad art)
--B----| |--
--B----| |--
|A|
| |
-|D|-----| |--
-|D|-----| |--
| | | |
|C|
| |
Z Z
| |
--E---------------F------
------------------F------
That's a terrible drawing sorry 
)
A = Crank ~5cm
B = Flywheel Axle
C = Other Crank Bit ~30cm (Sorry don't know the correct names)
D = Bearing (I hope)
E = Another Bearing
F = Treadle Plate (it's pivotted BTW)
Z = Shows this bar is much longer than A
Can you buy this sort of set up? If so where as google has let me down. If
not how would you go about producing this? I have considered butchering a
couple of bicycle pedles but that feels like a really bad solution.
Many Thanks,
Graham
--
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===============
Have you considered using an old Singer sewing machine foot treadle? You
can usually find old sewing machine stands quite cheaply which incorporate a
foot treadle. They usually drive the machine via a round leather belt. You
might be able to cannibalise or copy.
Cic.