stainless leaf springs?

HermanKnives

HermanKnives

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Joined
Aug 11, 1999
Messages
734
well, i tried this in the automatic forum and didnt get anything
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i want to know what is the best stainless spring steel for leaf springs cuz i am going to make some autos this year and mine will be pinned together so i dont want them to be breaking on me. has anyone used 17-4 for leaf
springs? whats the best stainless for this?
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Tim Herman
visit Herman Knives at:
Herman Knives

 
email ken onion at shopjunky@aol.com and he will give you the scoop....he gets long pieces of some kind of stainless from another knife maker...he gave me a few..but i cant remember where he got it....sincerely
forgot to say they come h/ted and ready to go. im sure you know the guy who makes them, just cant remember his name but he is well known.
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http://www.mayoknives.com




[This message has been edited by tom mayo (edited 01 January 2000).]
 
Tim,
I make some small parts at my full time job out of 17-4. We heat treat them at 900F for one hour and that brings the thin steel parts to a "springy" state. We use the parts in a food processing environment and it seems to have good corosion resistance.
I am not that familiar with the steel but I can tell you that the parts we make are about .010-.030 and take a LOT of flexing!
I would be glad to send you some however everything we use is round stock at least 5/8" dia., not good for knive springs!
Autos that are pinned together? I will stick with my fixed blades for now!
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Neil

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Don't know if it is the best, but 440c under
hardened. Guench at 1800 draw at 400 makes a
good spring. So does ATS-34. Draw at 1250. I
also think that 440a might make a good spring.
It doesn't get as hard as 440c to start out
with.
 
Tim ,

Call Rendon Griffon he has some 304ss work hardened any size you want . I've used damn near everything and in my opinion this stuff rules you can bend the crap out of it and it doesn't crack has great memory and doesn't rust very easily .

I don't have his number with me now but he's in the annual


Aloha!!! Ken Onion
 
Tim
17-4 works fantastic..
15-5 and 18-8 work also.
I have used 1070 it works great
Also 301 cold hardened half hard works great.

Some folks are using 1084 and 1095 also . Good plain carbon works great.

I am also using 410 ss

As for the ats and 440c I have always had bad luck down the road with
stress problaem. The others mentioned here I have been putting in my
autos (DA and Single action ) for 8 years now. I had 5 springs break in that
time frame
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New Web at www.darrelralph.com

 
Tim
As for your taper question in the other forum . I start with around .07 thick and taper to around .03. Yes it need to be tapered IHOM . Like in a gun.. whipped they call it..
As for finding thin 17-4 I havent looked. I buy 3/16 and cut the spring in a wedge from there and finish it with the whipp and bent close to the way i want it. Then 900 deg for an hour..
I havent had one of these break in five years.
The 301 half hared is avaible a texas Knife maker supply. in .06 thick x .187 wide . This works well also. For the size of your knives this thickness will work fine. On Note . The knife should be friction free in opening to obtain the speed you need without overpowering the blade.. In the future after it gets loose the faster speed will cause the knife to hammer itself to death.

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