Downsides to Pivot Bushings? Why don't all knives use them?

Discussion in 'General Knife Discussion' started by bvo85, Aug 15, 2017.

  1. katanas

    katanas

    Jan 6, 2012
    So, on a rather high end, non adjustable knife they add a degree of smoothness not available with even high priced productions (I'm sure people like Mr. Bose also have other special qualities in their knives). Makes sense. :cool: Still, why in production knives? :confused: (NO, I am not being deliberetly obtuse, I just don't get it in the general knife world and I consider sebenzas, I missed other production knives using them (PM2=different), as fine as they may be, to be in the "general" knife world) And, by the way, have you priced a corvette vs a camry lately? I've had corvettes and better, so I get what you are saying I just don't think the analogy fits. ;)
     
  2. Mo2

    Mo2

    Apr 8, 2016
    What about the DDR "No Loctiteâ„¢" pivot system?

    I have a sebenza and it's pivot is great. My pm2 I had to take it apart and re assemble to get good action but it's really great now. Interesting pivot to say the least.

    My Reate horizon d has a different type of pivot but the blade goes center every single time without issues. I can crank it all the way down and it's good to go. Whatever they are using is great.
     
  3. katanas

    katanas

    Jan 6, 2012
    THANK YOU! You have completely cleared it up for me. :cool: I now understand that I clearly "just don't get it". :eek: Thanks to all for the attempts to enlighten. It has definitely been interesting. :thumbsup:
     
    bvo85 likes this.
  4. number9

    number9 Gold Member Gold Member

    416
    Mar 5, 2017
    Man, if it wasn't 1:00 in the morning, I'd turn that $#!+ on, and up, right now. I'm gonna set the record where I'll see it in the morning and get the day started.
     
    traumkommode and G. Scott H. like this.
  5. traumkommode

    traumkommode Gold Member Gold Member

    Dec 3, 2015
    That's what I'm talking about!
     
  6. number9

    number9 Gold Member Gold Member

    416
    Mar 5, 2017
    It was so good while I was eating breakfast, that I've got it streaming at work. Jump!
    Now, back to your usual blade related programming.....
     
  7. katanas

    katanas

    Jan 6, 2012
    Being significantly older, my Corvette/Ferrari cruising fav was Yes-fragile. :cool: Ahh, the memories. :D To stay on topic, I didn't need any bushings in order to listen. ;)
     
  8. Alberta Ed

    Alberta Ed

    Jun 29, 1999
    I appreciate the precision and elegant engineering of my Sebbie, but as others have observed here, on other designs a bushing is not necessary. Some composite handles provide a natural lubricity, so adding a bushing would add little. Emerson uses a plastic or teflon bushing, probably a less expensive way to achieve a similar result with a bronze bushing.
     
  9. Zombie411

    Zombie411

    630
    Aug 5, 2017
    There is an entire thread in itself.
    Teflon vs. Phosphor bronze.
     
  10. katanas

    katanas

    Jan 6, 2012
    Thank you VERY much. :thumbsup:Definitely start that up, I wasn't confused enough yet. :p
     
  11. Zombie411

    Zombie411

    630
    Aug 5, 2017
    Well... In a galaxy farrr, farrr away there was a guy named George Teflon (aka Rocco). He was slick as slick can be....

     
    Last edited: Aug 17, 2017
  12. -Corey-

    -Corey-

    830
    May 29, 2015
    Just to clear things up for you...what you described is called a pivot post and pivot screw. A bushing is a different piece. The way it works is the bushing is slightly thicker than the blade, the washers fit around the outside of the bushing, and the pivot post fits through the inside of the bushing. When you put the knife together and tighten the pivot screw, you're pinching the scales against the bushing. On a knife with just a pivot post and pivot screw, when you tighten the screw, you're pinching the scales against the washers, which then pinch against the blade, so the more you tighten, the harder it is to open and close the blade. With the bushing, you can tighten as much as you want and it doesn't affect how much force it takes to open and close the blade.

    Here's a pivot screw, pivot post, and pivot bushing...
    SAM_7616.JPG SAM_7617.JPG
     
    DocJD, katanas, G. Scott H. and 2 others like this.
  13. Zombie411

    Zombie411

    630
    Aug 5, 2017
    New to modern knives so I have to say that is an excellent post/explanation, and I THINK I know that blade.
    The dyed thumbstud?
     
  14. -Corey-

    -Corey-

    830
    May 29, 2015
    It's from a knife art sebenza, the anodizing is just wearing off.
     
  15. Zombie411

    Zombie411

    630
    Aug 5, 2017
    Not the blade I thought...
    Thank you Mr. Corey!
     
  16. lieferung

    lieferung

    May 24, 2016
    Thanks for the clarification Corey, it helped a lot. I think I see what the OP was getting at now, I imagine I'd like a consistent pivot tension from a bushing more than variable tension without.
     
  17. lieferung

    lieferung

    May 24, 2016
    It's a Sebenza. I've only been doing this knife thing for a few years, one of the designs you will learn to recognize the Sebenza :D never bought one, probably never will until I handle it first.
     
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  18. Zombie411

    Zombie411

    630
    Aug 5, 2017

    100%
    [​IMG]
     
  19. Erik Norseman

    Erik Norseman Gold Member Gold Member

    77
    Jun 9, 2017
    So, in summary, it seems like the pivot bushing has little to no major drawbacks aside from cost, although it also seems that many knives seem to work perfectly well without the need of a pivot bushing. I, for one, have had a few folders without a pivot bushing that were essentially just as nice as my sebenza in terms of action, smoothness, brainless reassembly, and consistent centering.
    The sebenza still feels a bit more solid and less finicky, however, and other companies that make production blades that have a lot of what a CRK has still do not feel quite as solid/reliable/bulletproof/insert term here.
    Never spent a lot of time with a PM2--but I've heard they're inconsistent.
     
    Last edited: Jan 10, 2018
    bvo85 likes this.
  20. Erik Norseman

    Erik Norseman Gold Member Gold Member

    77
    Jun 9, 2017
    Repost
     
    Last edited: Jan 10, 2018

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