how can i make a spring

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Jonny:
I used to be a spring maker one of three in the world but not torsion or expansion springs. It might be easier to use unhardened steel rather than the already hardened and tempered stuff you need to overbend.

There will be a lot of trial and error in the hardening and or tempering all steels work different, it will either collapse or break. Most modern stuff we had to harden in water and blaze off with whale oil which burns at 150 degrees.

Probably easier having a rummage through some tools, parts etc 1/4 o/d is common.

jonesie:
sorry guys a miss spoke i meant to say music wire and not spring steel. guitar stings are good to make small springs,they need to be drawn at 400 deg.after making.http://www.deansphotographica.com/machining/projects/springs/springs.htm.this is a good site for how to do,worked good for me. jonesie

picclock:
Hi Jonesie

That's a great site. Just reading that has given me much greater confidence. Corrected links are

http://www.deansphotographica.com/machining/projects/springs/springs.html

http://www.deansphotographica.com/machining/projects/springs2/springs2.html

There are also some interesting other projects on http://www.deansphotographica.com/machining/projects/projects.html

Will get hold of some guitar strings and give it a go - It looks really easy now I've seen the info. Interesting that the springs reduce in diameter after the heat treatment.

Many Thanks

picclock

Jonny:
Thats only applicable to music wire where the finished job shrinks.
Its because the wire comes hardened and tempered, although soft compared to other materials its easy to bend as in collapsing and therefore stressing.
Bend it too far it wont spring back, ok for low load intermittent use.

In annealed state V and leaf springs set to a pattern will collapse a touch when pulled up after hardening and tempering. EN42 nearest modern equivalent but a bit soft.

Your car springs are a totally different entity, hardened after then tempered.
Best one ever seen due to cost was multiple parts actually casted in several moulds then taken to a spring maker to make good.

jonesie:
hi picclock glad that site was a help. i just made a spring for my farmboy hit and miss,it needed to be .400od 1.05 long and 7 turns of .019 wire. i used of piece of .017 guitar sting on a 6mm dia drill rod and it can out real close. then wrapped in steel wool and heated to 400 degs. and it works real good. good luck jonesie.

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