Stop pin sizes. Is bigger better?

B

BARRY JONES

Joined
Oct 2, 1999
Messages
834
I have made a few linerlock folders. The stop pins that I have used are all 1/8" in diameter. Does a 3/16" stop pin have any advantages over a 1/8" pin? If so, Why?

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Barry
Jones Knives

Do you hear that?
That is the sound of inevitability.
 
Barry,
Don't know if it's any stronger. I just drill and ream the pivot hole and the backstop in at the same time and it's handy that they are the same size.
Seems to work for me.
 
actually that is a very complicated issue. mostly it depends on how heavy your blade is, also, what thickness is the ti (liner thickness?) mostly i use .187 but i do use .125 hardened stainless pins a lot. the ti thickness is important, as its your foundation for the stop pin which is part of the total integrity of the knife.

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http://www.mayoknives.com


[This message has been edited by tom mayo (edited 02-15-2000).]

[This message has been edited by tom mayo (edited 02-15-2000).]
 
You asked if bigger is better? What is the shear strength of the steel used?
As for contact area with the blade if you do the trig and figure the amount of contact of a flat on a round ... the advantage is very very very little... (not much) hahaha
A flat hitting a round has a very small amount of contact in the .125 and .187 dia realm. The dia or area of the pins size may have a small advantage.
Here the real question? Does it look stronger to use a 1/8 stop pin or a 3/16 stop pin?
A square stop would have more contact and more area (square inches of steel in area). Full backspines are most likley best but then you loose the drainage factor if the knife gets wet.
Just MHO

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[This message has been edited by Darrel Ralph (edited 02-16-2000).]
 
Thanks for the help guys.

Tom,
I use .060 titanium liners. My stop pins are precision stainless (.125) and are press fit into one side with a tight, but not pressed, fit on the other side. My blade is 1/8" thick and 3-3/8"(exposed) long.

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Barry
Jones Knives

Do you hear that?
That is the sound of inevitability.
 
well, like darrell said, you could go either way, but the most important part is that they are hardened imho, because you dont want the striking point to start mushing on you after 1000s of openings. lots of guys like to flick them open...Ken onion told me guys complain to him that the stop pins on his spring activated knives are only .125 but he just laughs....the only problem Ive ever had was when i used to make them with a screw thru the pin, years ago, and i made a long dagger type blade and they guy flicked it so much it ripped one side of the screw loose from the liner (2-56 screw-i replaced it with a 4-40 screw) but i make them like you now, with the pin thru both sides of the liner... 060 is plenty thick for the ti although i am running into more and more guys using 080-seems overkill to me.

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http://www.mayoknives.com


 
If its strong enough for the type of knife its in I don't think it matters much. One advantage I can see to a bigger pin is it may develop less blade play if the side gets flattened out than on a small pin. Its sort of the same idea as a contact wheel the bigger the wheel the flatter the grind it makes. So the bigger the pin the flatter the edge is going to be, so more of the pin will have contact with the blade.I hope that makes sense, I can't really figure out a better way to say what I mean.

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Fix it right the first time, use Baling Wire !
 
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