Best spring steel

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Jun 25, 2001
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peter nap said:
For a traditional Buck style back lock, what is the best spring steel?

Don
I think 1095
I sent some to Bruce B and he wanted more, he's using it on his cut and shoots
maybe he'll coment..
 
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If your talking about using it for the lock spring, I know of one maker that uses the spring off of drum brakes, he just cuts a straight section and drills a hole at an angle in the but spacer to hold the spring. Seams to work pretty good. Not sure what the steel is, but I'd bet in the 1070-1095 range.
 
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I think you'll find that there are two different methods of making a lock back. One has an integral spring on the locking bar. With this method, you'd obviously have to do the whole spring heat treat thing. In "how to make folding knives" by Clay, Lake and Centofante, one of them uses this method and the back bar is made of the same material as the blade (ATS 34 in this case). I don't know exactly how they handled the heat treat. Its not a spring that has to flex very far and doesn't have any complex bends so I think you can get off pretty easy with it.

The second method is to use a spring mounted in the backspacer seperate form the back bar. I think this looks like a much easier way to go. Using this method, most folks use a peice of work hardened 300 series stainless (available from TKS in a few different sizes for cheap). Its a flat leaf spring thats just stuck in a slot in the backspacer. It won't come out once the knife is put together cause its always under a load. This is kind of nice cause you have 2 ways to adjust the tension, first in the angle of the slot, and second by bending it a little bit.
Another variation of this is to use a coil spring (wayne clay does this in the book) which sits in a little slot in the backspacer and pushes up on the very back of the lock bar. Finding the right kind of spring could be a little more difficult cause if its wound too tightly it obviously won't compress enough to let the lock bar travel. But it should still be pretty easy to do.


Oh yeah, as far as whats the best spring steel, I don't know but I thought I'd throw all that out there cause I'm supposed to be writing a 4-6 page paper on Frederick Douglass's view of literacy and he's not around to ask, so I'm putting it off and needed something more fun to do ;) :footinmou
 
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Get back to work Matt. You want to grow up iggernent? :D

Thanks Dan. I was thinking 1095 too, but wasn't sure if some of the other 10 series might be better. I'm playing He!! getting a good, non grainey spring temper on 1075.

This is going on a cut n shoot too. Bruce, help me out!
 
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peter nap said:
Get back to work Matt. You want to grow up iggernent? :D

Iggernent? IGGERNENT!?! Read my post! I quoted stuff outa a book! A BOOK! :p


besides that paper aint due till 1:30 tommorrow afternoon an I already have a whole page done :eek:
 
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OK I vote for 1095 too. Dan keeps me supplied with the stuff. The trick I have found is to austinize in salt and quench in 135 deg. tough quench followed by a 1 hour temper at 700 deg.

Ive tried the torch and quench but get grain growth and the springs break. Salt bath is the real secret with any spring steel I think. They make clock springs with 1095.

If you smooth and polish the spring before the temper it comes out of the temper oven the prettiest blue Ive seen! Im excited!
 
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That's the same procedure you emailed me about a while back Bruce. I'll give it a try. This is an unusual spring with a lot of stress in a short section.
 
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I like em as long as possible but try it and see what happens. Lets see how it looks when youre done.
 
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My vote is for 1095 also. I've always done springs with a torch and I rarely have had any problems. I guess I'm just better than you guys :p You just have to pay really close attention to your temps and get it right the first time around.
You could always use Ti if it's not a visible part.
 
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Jason Youre just too young to have grain growth. Wait till you are our age and you will be breaking springs too.
 
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Matt Shade said:
Iggernent? IGGERNENT!?! Read my post! I quoted stuff outa a book! A BOOK! :p


besides that paper aint due till 1:30 tommorrow afternoon an I already have a whole page done :eek:

now we'er getting into plagiarism are we :rolleyes: :D :D
 
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Matt Shade said:
I prefer to call it "the sharing of others ideas" :D
No my paper isn't done yet :footinmou

:D :D hahaha we have too much fun here don't we :D
 
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Yes we do! I'm at the start of page 4 though so I got it whipped. The BS meter is about to redline this morning :D
 
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