Advice on making spring

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djones
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Advice on making spring

Post by djones » Wed Jul 22, 2020 2:29 pm

Hello,
The spring broke in one of my Chinese clone stiletto's.
I thought I would try to make a replacement.
First try was to buy music wire in the approximate diameter, but it was so stiff and springy that I could not make the necessary bends.
My next try will be to try drill rod and harden and temper it after bending.
The original spring appeared to be a stamped piece.
Yeah, i know, too much effort for a junk knife, but I would rather learn on this than ruin a good knife.
Any advice will be appreciated.
Dan

XBMX
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Re: Advice on making spring

Post by XBMX » Wed Jul 22, 2020 4:00 pm

You're probably going to have to remove the back spring in order to determine if the spring is repaceable or welded in.

djones
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Re: Advice on making spring

Post by djones » Wed Jul 22, 2020 4:05 pm

I have the old spring out. Just had to remove one pin. If I could make a proper spring it would be easy to install. I just need to duplicate the bends in the old spring, which I am having a hard time with.
Thanks
Dan

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Bill DeShivs
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Re: Advice on making spring

Post by Bill DeShivs » Wed Jul 22, 2020 6:31 pm

If you have the proper diameter music wire, just anneal it by heating to red and letting it air cool.
Make the necessary bends while it's soft.
Heat the spring to cherry red and quench it in canola oil WHILE IT IS RED. Check to make sure the piece is hard by testing with a file. The file should skate off of the steel. If it doesn't, re-harden.
Clean the spring to bright steel and gently temper to just past blue color if using a torch.
Bill DeShivs, Master Cutler
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Factory authorized repairs for:
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djones
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Re: Advice on making spring

Post by djones » Wed Jul 22, 2020 7:03 pm

Thanks,
That was exactly what I was looking for...a recipe.
Dan

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JimBrown257
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Re: Advice on making spring

Post by JimBrown257 » Wed Jul 22, 2020 10:59 pm

This isn't a good practice knife as these are the only ones that have these pinned in weird bend springs.

djones
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Re: Advice on making spring

Post by djones » Wed Jul 22, 2020 11:09 pm

I did not know that either. Well let me try. It will be good experience anyway. I am not at all sure I will be successful.
Thanks
Dan

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JimBrown257
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Re: Advice on making spring

Post by JimBrown257 » Thu Jul 23, 2020 12:54 am

I would get a cheap two-piece auto that needs a new slip in spring. Replacing a spring is a great place to start if you want to learn to work on knives. Putting that three point bend in a spring for an Edge Co type is something you will most likely never have to do again.

djones
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Re: Advice on making spring

Post by djones » Fri Jul 24, 2020 1:44 pm

It looks like JimBrown257 may be right. Getting the bends right may be more than i am capable of. I followed Bill's advice on heating the wire and now it is much easier to bend. Well, I ain't giving up yet.

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JimBrown257
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Re: Advice on making spring

Post by JimBrown257 » Sat Jul 25, 2020 12:31 am

You can also use a small file to expand the open area at the bent spots. Or get a piece of raw steel and cut/file it out to the exact shape then heat treat it.

Or if you just need a new spring for that knife, I might have a 9" pinned type spring in my spare parts.

sammy the blade
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Re: Advice on making spring

Post by sammy the blade » Sat Jul 25, 2020 12:39 am

Bingo

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