[TheForge] Treadle Hammer Springs

[Bruce Freeman]

Lynn,

I'm glad you mentioned the safety "wire" (a 1/8" steel
cable is more appropriate).  I'd go one step further
and suggest you don't reuse old springs.  You only
have to have a garage door spring let go once nearby
to understand why.  It happened near me (on a garage
door) years ago, and I was VERY glad it didn't hit ME.
 Two solutions are a cable inside or a sheath outside.
 The former is easier.  The latter may be commercially
available.

There are other considertions, however:

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.  It MIGHT
be true because garage-door springs take a load to
even BEGIN to extend, whereas most small springs
don't.

Are you working from plans?  I suggest you do. 
Blatent commercial plug:    Take a look at
www.grasshopperhammer.com for my design.

Bruce
NJ



--- Lynn and Susan Lang <langfarm at together.net> wrote:

> Hello	
> I am looking to build a tool, assistant, Treadle
> hammer.
> It looks to me like the springs could be left overs
> from an overhead
> door.
> 
> What are the springs? 
> 
> For safety reasons why not a wire inside the
> springs?
> 
> Thank you
> lynn
> 
> 
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