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The Folding Knife (& Switchblade) Forum The materials, techniques and the designing of folding knives.

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Old 01-06-2008, 09:24 PM
JeffreyPrater JeffreyPrater is offline
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Slipjoint Pivot Question

I have been looking at several factory tangs, I have noticed that the distance from the center of the pivot point to the run up marked A is slightly less than the distance from the pivot point the the end of the tang marked B.

Is there a reason for this, and is there some rule of thumb to follow in making this area?
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Old 01-07-2008, 12:17 AM
mike koller mike koller is offline
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The greater distance to "B" ( probably a difference of 45-55%) will require you to move/ displace the spring more to close the knife. The 55% will be on the outside when closed... meaning more to open it.

Hopefully those with more knowledge will stop by soon and correct me if needed.


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Last edited by mike koller; 01-07-2008 at 12:21 AM.
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Old 01-07-2008, 12:18 AM
CWKnifeman CWKnifeman is offline
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There was at one time a rule of thumb of 45 to 55%, which can also be said for the distance of the upper and lower part of the liners to the pivot. But all that I can say is that it will make lock up better, as well as walking and talking better.


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