Knives with pivot bushings?

M

MRaymond

Joined
Jan 27, 2012
Messages
2,166
What knives have pivot bushings. So far all I know is the Sebenza (not 25) and paramilitary 2. There has got to be others, what are they?
 
seelow123 said:
Yeah, The Manix 2 has a pivot bushing. I think more knives need to utilize them.
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Why? Of the almost 100 knives I have, not one that I know uses bushings. Don't miss them in the least. My favorite EDC knife is the Spyderco Military, it has no bushings and opens and closes just fine. Simple is best IMHO.
 
T. Erdelyi said:
Titanium Buck 186, had one back in the mid 80s.
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Titanium but looks like a 110? I had one also, don't recall it having bushings though. Maybe it did. Back then I did not think knives with bushings were done.
Anywho, I drilled and tapped mine and put a Spyderco clip on it. Then added a One Arm Bandit to it, made it more modern. Then sold it to a friend. ;-(
 
cbxer55 said:
Why? Of the almost 100 knives I have, not one that I know uses bushings. Don't miss them in the least. My favorite EDC knife is the Spyderco Military, it has no bushings and opens and closes just fine. Simple is best IMHO.
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I didn't say knives that didn't have pivot bushings were inferior. I just think they are a smart design and I like the action on knives that utilize them so I think more should have them.
 
cbxer55 said:
Why? Of the almost 100 knives I have, not one that I know uses bushings. Don't miss them in the least. My favorite EDC knife is the Spyderco Military, it has no bushings and opens and closes just fine. Simple is best IMHO.
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Pivot bushings are not complicated. If fact they're easier to assemble since the pivot tension is not set by the torque on the pivot screw. Just because you don't like them doesn't mean more shouldn't be produced.
 
Moxy said:
Pivot bushings are not complicated. If fact they're easier to assemble since the pivot tension is not set by the torque on the pivot screw. Just because you don't like them doesn't mean more shouldn't be produced.
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They can be very complicated actually. If the are enough variations in the tolerances, what ends up happening is blade play, lock rock, uncentered blades, and potential legal issues because they can be considered "gravity knives". They are easy to make for manufacturers, but difficult to make correctly on a consistent level.
 
A pivot bushing is a cylindrical piece that goes into the pivot of the blade that is a tiny bit wider than the width of the blade itself, the actual pivot goes through this piece and tightens both sides on the knife together onto the pivot bushing, instead of just the washers. This allows for the knife to be tightened down onto the bushing and not just the washers to the blade so the blade opening doesn't bind.

(Images off of google from somewhere on these forums)

6-pivot-washer.jpg


Pivot bushing is in the middle, flush with washers, and can be popped out like so:

3-parts.jpg
 
RevDevil said:
They can be very complicated actually. If the are enough variations in the tolerances, what ends up happening is blade play, lock rock, uncentered blades, and potential legal issues because they can be considered "gravity knives". They are easy to make for manufacturers, but difficult to make correctly on a consistent level.
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Complicated in that they require tighter manufacturing tolerances, absolutely. My point was that they're not really anymore complicated as far as the end user is concerned.
 
None of the Spydercos mentioned have a true bushing like the Sebenza. The P2 and M2, for example, use a stepped pivot, not a pivot bushing.
 
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