I am in the process of rebuilding a Commonsense power hammer and it looks like the spring is pretty much flattened out. The adjustment was all the way in when I tore it down.
I am thinking about heating it and stretching it out some. Has anyone done this?

I think that idea is pretty bad. Springs ware out. After so many years they start to micro crack and will eventually break. Just like any tool they have a life span. Just take some good measurements of the spring and estimate the size before it was worn out and buy a brand new spring. Do not wast time with old shot springs, trying to reshape them is just asking for things to break and damage the hammer or yourself. BUY A NEW SPRING if the old one is worn out.

What He Said!

I'd give it a try. most likely heating and rehardening and tempering would surely show any flaws, if not then I'd be sure to safety up for the first couple of hours running it.

I wonder too about making a totally new spring, can't be all that hard.

When trying something like this out I like to contemplate the downside of failure and use that to determine if "the game is worth the candle"

If failure of the spring can result in injury or worse then perhaps tis best to get a proper one.

A new spring will also most likely cost less than 100 shipped to your door. Pretty cheep for something that is so important for a expensive piece of equipment.

If he was talking about making a new leaf spring for something like a leg vise I would say make one by hand no problem. A bad failure is much less likely to hert the tool or yourself under that condition. A compression spring that is worked under power by a 1 to 5 horse motor that is right next to your face is much more dangerous if it fails.

I made a new spring for my 50 lb Canadian Giant the tricky part is the heat treat. I had access then to an industrial heat treat facility.

If you can show a place that I can buy a new spring for around $100 I will call them now. I talked to Sid @ Little Giant yesterday, he has one that is close to what I have, the wire size is a little heavier. His price is around $250 with shipping.
Does anyone know of a shop that can make one of these springs?

What is the size of the spring. Length, Wire Diameter, and Diameter of Rings.?

The spring in its current condition is 7 inches long, 3.6 inches outside dia. 2.15 inches inside dia and it is .75 wire dia. There are 8 coils. I think 8 inches in length should be about right for a new spring

Clinton, I would google spring manufacturers it Calif. and call a few you might be surprised as to how inexpensive things can be!
here you could have a set of leaf springs made up to suit a 1200 ton trailer made up for $100.

Good luck Ian

I sent out request for quotes to three different manufacturers, so I will see if any want to do the work and what the cost will be

I am in the process of rebuilding a Commonsense power hammer and it looks like the spring is pretty much flattened out. The adjustment was all the way in when I tore it down.
I am thinking about heating it and stretching it out some. Has anyone done this?

It seems like not too long ago Hollis (HWooldridge) mentioned that he had made a new spring for a 50lb? LG out of A36 and that it was still going strong after several years. I looked around but could not find that post but maybe Hollis will see this and comment? Maybe you could send him a private mail?

It seems like not too long ago Hollis (HWooldridge) mentioned that he had made a new spring for a 50lb? LG out of A36 and that it was still going strong after several years. I looked around but could not find that post but maybe Hollis will see this and comment? Maybe you could send him a private mail?

I searched for that thread yesterday, and the added information does not help me find it. My google-fu feels weak.

Phil

It looks like I will be getting the spring from Sid @ Little Giant. The only Quote that I have received is for $561.91 a little more the the $100 range. Out of the 4 requests that I sent out I got 2 responses, one item orders do not seem do-able

seems like you can double your money sam....... :D

Hmm might check for die springs that would fit your hammer's needs