Are Spring Coils Standardized?

I

IGotStabbed

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Jul 11, 2007
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I post this here since it gets more traffic.

I have a MOD mini MPMK, which is a small manual version of the famous MPAK knife. The manual version still has a button, but it's to close the blade. My question is, can I drop a coil spring in here and turn it into an auto?

Thanks
 
I don't know.

Have you taken the knife apart to see if all the structure is present for the spring?

If the structure is there, most autos seem to take one of the three "standard" springs.

Personally, I'd leave it manual in any case.
 
Might be. Button locks tend to have much of the structure there because the CNC cutting operation is programmed to just do it. It's cheaper than coding a separate one, splitting production, etc.

It may not be a coil. Many autos use a leaf back spring, omega spring, or torsion bar. Lots of different ways to do it, especially stuffing one under the scales and yet keeping it protected from junk which may hamper the operation.

What's been a eye-opening observation is that adding a 39 cent spring to the knife seems to add $100 to the price. The gen public pays that much just to enjoy the "magic" of an auto, when a hole opener or thumbstud is actually more reliable and less prone to malfunction. In engineering, simpler is better - but the forbidden fruit is just there out of reach, which keeps sales springing up.
 
tirod3 said:
What's been a eye-opening observation is that adding a 39 cent spring to the knife seems to add $100 to the price. The gen public pays that much just to enjoy the "magic" of an auto, when a hole opener or thumbstud is actually more reliable and less prone to malfunction. In engineering, simpler is better - but the forbidden fruit is just there out of reach, which keeps sales springing up.
Click to expand...


That's the interesting thing, the manual and auto version differ by alot, certainly not the price of the spring. The reason I even bother looking into converting this particular knife is because it's a button lock, which to me is the most likely convertible knife. Other auto and manual versions of the same knife are completely different, the manual is liner lock. There is no way you would be able to convert that.
 
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