[TheForge] Treadle Hammer Springs

[aaron craig]

Garage door springs are available in several different
tensions at placeslike home depot
--- Marc <marc at ironringforge.com> wrote:

> I used Clay Spencer's plans as a basis for TH and
> used his spring
> concept. Basically, they're half-springs from a
> garage door. You heat
> the center with a torch until you can fold the
> spring in half, then cut
> it and make a hook with each cut end. My hammer has
> three of these
> half-springs, and they're constantly under tension.
> 
> One difference I made was to go with a lighter
> hammer head, only about
> 35 lbs., and the three springs would normally be
> used for a 70-lb'er.
> But I wanted to get a quick return that way and get
> a higher rate of
> blows per minute. It's also easier to control light
> blows for things
> like veining leaves. I don't usually work anything
> heavier than 3/4", so
> I don't need a real big mass. This thing will draw
> out a 5/8" RR spike
> just fine. Much, much easier than by hand.
> 
> --Marc
> 
> On Sat, 2007-03-17 at 19:28 -0700, Bruce Freeman
> wrote:
> 
> > 
> > If a spring doesn't have an initial tension, this
> is
> > not an issue.  That is my guess as to why some
> people
> > prefer small springs to garage-door springs.
> > 
> > Bruce
> > NJ
> > 
> > 
> > --- xlch58 at swbell.net wrote:
> > 
> > > Steve Smith wrote:
> > > >
> > > >
> > > > Bruce Freeman wrote:
> > > >
> > > >> Rumor has it that multiple small springs are
> > > better
> > > >> than one large spring, and you see some
> treadle
> > > >> hammers so constructed.  I haven't given this
> > > enough
> > > >> though to explain why this should be true.  
> 
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