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0350 Torsion Bar

Discussion in 'Kershaw Knives / Zero Tolerance' started by NOREAT, Sep 28, 2012.



    Dec 17, 2011
    It broke, again. That's the third time this year.:( I will get a new one with the warranty, but is there any way to prevent breaks? Or do I just need to use it as a manual?
  2. OvalmanPA


    Dec 5, 2011
    Trying to figure out what you're doing to break them myself? :confused: I've never heard of or seen someone go through that many torsion bars before in ANY assisted knife.
  3. solidorange

    solidorange Gold Member Gold Member

    Aug 30, 2011
    can't believe you've broken 3, that is highly unusual. :confused:

    that being said, the 0350 is much more enjoyable as a manual. i run both of mine without the torsion bar and absolutely love them. there is no need for an assist on a knife that opens as smoothly as the 0350. :thumbup:


    Dec 17, 2011
    Yea, I am a bit surprised too. I wonder if the cavity for the torsion bar was machined incorrectly? I am not abusing it in any way, so I am clueless.
  5. RevDevil

    RevDevil Super Evil Supermod Staff Member Super Mod

    Nov 9, 2009
    If that were the case, then we'd be hearing about it much more often. The only thing that comes to mind are:
    The torsion bar wasn't heat treated properly, you're not installing it correctly, or the knife is open and closed repeatedly to the point where the steel bar fractures due to heat from bending. :foot:
    The plot thickens.
    Last edited: Sep 28, 2012
  6. jkwithawave

    jkwithawave ..... Platinum Member

    Sep 8, 2011
    My torsion bar broke awhile ago, and I have no plans of replacing it.
  7. Nullity


    Jul 28, 2002
    I've broken 2 torsion bars within a week.

    If you constantly play with your knife, compressing and releasing the spring, the spring will heat up (or something) and fail much quicker than if you opened/closed it sparingly.
    I like to play with my knives, so I've eventually decided that torsion bars are not for me.

    I've only had torsion bars fail while successively opening/closing my knife.

    Edit: The knife I'm referring to is the Kershaw Avalanche.
    Last edited: Sep 28, 2012


    Dec 17, 2011
    I learned not to play with it as much after the first two. I still do play with it, but not to the point that I would expect it to break. Operative word being expect. How much is too much? Is flicking for a minute or two every few hours/days enough to cause a break?
  9. calvinw


    Feb 28, 2012
    I don't own a 0350, but I've never broken a torsion bar. And I play with my Blur a lot.

    Since it's already broken, why don't you give manual mode a try?
  10. OvalmanPA


    Dec 5, 2011
    Obviously I believe you've already answered your question with 3 broken torsion bars. :D
  11. jwolf90


    Oct 17, 2011
    3 good lord :eek: yep looks like you need to go manual or give the poor torsoin bars a break:D
  12. Grease


    May 10, 2012
    The knife opens almost as easily without the torsion bar. You might as well just leave it out and get addicted to manually flipping it the way I just did with mine :p
  13. NOREAT


    Dec 17, 2011
    Good point. I'll keep it manual. Apparently flicking is not allowed with an assisted knife.
  14. sticktodrum

    sticktodrum Gold Member Gold Member

    Apr 16, 2012
    Just get another one, and try again. It doesn't cost you anything but an email or phone call.
  15. bean_sips


    Jul 26, 2010
    My 350 torsion bar just snapped the other day. I'm going to try it de-assisted for awhile to see how that feels before trying to acquire a new torsion bar. My only real problem now is that the blade centering is atrocious. No matter how much I tweak it, I just can't get it centered.

    So far I'm liking it as a manual, though.
  16. BrentD86

    BrentD86 Basic Member Basic Member

    Jul 27, 2012
    Wow i have opened my 350 thousands of times and the first thousand was prolly in the first week. Never had one break, i like it as a flipper and don't see how anyone can install one incorrectly they only seem to go in one way, do you grease them when installing?
  17. Nullity


    Jul 28, 2002
    I wonder if pivot tension has anything to do with torsion bar failures.

    I prefer a tighter pivot. On an assisted knife, I tighten the pivot until the opening action just barely reaches lock engagement.
  18. bad_juju

    bad_juju Gold Member Gold Member

    Jun 7, 2011
    I am glad I don't have some of you peoples luck! I have had to replace 1 tortion bar to date and it was from one that sat for a long time closed in the box.
  19. redfeenix


    May 12, 2011
    Kershaw themselves have said their torsion bars are tested to the point that it can allow 10,000 openings. Something may be wrong with your 0350, I suggest you send it in if you want your 0350 to be assisted.

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