Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 31
  1. #1
    Senior Member
    Join Date
    Jan 2005
    Posts
    661
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Removing Bic pen from Kryptonite lock

    Whoever tried to steal my commuter bike from outside Union Station in DC over the weekend left the stub end of a Bic pen jammed in the lock, so the bike is going to sit there until I figure out how to get the lock open. The lock cylinder turned about 15 degrees before the pen broke off, so it may be impossible to unlock the lock no matter what I do.

    Assuming that the lock might still allow use of the key (since the plastic is presumably holding the pins and tumblers in place, maybe I can grab the solid inner cylinder in the keyway with a vicegrip), is there a solvent that would dissolve the plastic pen barrel thoroughly enough to allow the key to be used?

    Otherwise, I suppose I could rent a cordless angle grinder.

    Any other suggestions?

  2. #2
    Senior Member curbtender's Avatar
    Join Date
    Mar 2007
    Location
    SF Bay Area, East bay
    My Bikes
    Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Schwinn Speedster, Mondia Special, Univega Alpina
    Posts
    3,060
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Angle grinder and cutoff blade will work, but you may be able to melt it out with a propane torch or mini butane. It sounds fatal either way.

  3. #3
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    26,140
    Mentioned
    12 Post(s)
    Tagged
    0 Thread(s)
    Acetone or MEK might soften or dissolve the plastic enough to remove the remnants. +1 on the heat approach also.

  4. #4
    Senior Member
    Join Date
    Nov 2008
    Posts
    580
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was thinking melt it out too, I would think a small lighter would do it just slowly but maybe slow enough to melt the plastic without getting anythung else too hot. Just don't sniff the fumes, plastic burning is nasty.

  5. #5
    Great State of Varmint Panthers007's Avatar
    Join Date
    Sep 2008
    Location
    Dante's Third Ring
    Posts
    7,481
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Just don't use acetone or MEK (methylethylketone) with the heat approach. They are extremely flammable. The cops might think you have a bike-bomb and shoot you! LOL!
    How do you keep an idiot in suspense?

  6. #6
    Senior Member
    Join Date
    Mar 2007
    Location
    Reston, VA
    My Bikes
    2003 Giant OCR2
    Posts
    2,369
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't think MEK/acetone will dissolve the plastic in a Bic pen - it's probably polyethylene or (more likely) polypropylene which won't dissolve in MEK. However, they're much more likely to dissolve in mineral spirits or gasoline if anything, so you could give that a try.

    Unfortunately, I don't think you'll ever dissolve enough of that pen even with an appropriate solvent. If you try, the pen will swell, and will actually become much tougher to get out. Even if you succeed, what you'll probably do is dissolve enough pen to actually seize the lock components as the solvent carries polymer through the lock mechanism.

    I hate to say it, but I see a grinder in your future.

  7. #7
    AEO
    AEO is offline
    Senior Member AEO's Avatar
    Join Date
    Jun 2007
    Location
    A Coffin Called Earth. or Toronto, ON
    My Bikes
    Bianchi, Miyata, Dahon, Rossin
    Posts
    12,255
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    paint thinner will melt plastic if you leave it dipped in there for a while.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  8. #8
    Senior Member
    Join Date
    Mar 2007
    Location
    Reston, VA
    My Bikes
    2003 Giant OCR2
    Posts
    2,369
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by AEO View Post
    paint thinner will melt plastic if you leave it dipped in there for a while.
    Problem is he'd have to immerse the lock. If he can rig a bucket of thinner up so the head of the lock is sitting in it...might as well give it a try. It'll take a while though.

  9. #9
    Banned
    Join Date
    Dec 2004
    Posts
    616
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I might try a cordless dremel with a tiny jeweler's drill bit, or maybe the tiny little grinder tips that they make for engraving/burnishing. These type of tips are small enough to fit in that gap and try to chew away the plastic of the pen.

  10. #10
    Senior Member
    Join Date
    Aug 2008
    Posts
    2,054
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's just a piece of soft plastic, try taking a pair of needle nose pliers and a solid grip and just rip that thing out of there?

    If the tumbler is already partially rotated, you'll need to grind the 'tooth' thing off your key to get it into the lock.


    P.S. wow the bic pen trick, after all these years? aren't the new kryptonites supposed to not work that way anymore?

  11. #11
    DOS
    DOS is offline
    Senior Member DOS's Avatar
    Join Date
    Feb 2008
    Location
    Arlington, VA USA
    Posts
    1,243
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by xenologer View Post

    P.S. wow the bic pen trick, after all these years? aren't the new kryptonites supposed to not work that way anymore?
    They don't work that way anymore. Clearly this is an old lock.

  12. #12
    Senior Member
    Join Date
    Jan 2005
    Posts
    661
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Yes, this is an old lock. Found out about the replacement program too late and then decided to take my chances. It was a reasonable decision until today.

    Thanks very much for all the help. I think the cordless dremel may be the first thing I try.

  13. #13
    Senior Member Crank57's Avatar
    Join Date
    Jan 2007
    Location
    Middle Tennessee
    My Bikes
    Giant OCR2, FCR2, Cypress
    Posts
    175
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Take a heavy duty paperclip, straighten about half of it out. Heat the straight part till it's red hot with a lighter or torch while holding the looped end in pliers. Then shove the hot end into the plastic in the lock. When it cools you should be able to pull it all out of the lock. If not, plan B with the grinder is still an option.

  14. #14
    Senior Member shecky's Avatar
    Join Date
    Nov 2003
    Location
    Home of the Homeless
    My Bikes
    Rustbuckets, the lot of them.
    Posts
    610
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'd try another bic pen. Shove it in and turn until unlocked. Once removed, you can throw it away or dig out the plastic with an icepick/nail/etc if you want to continue using it.

  15. #15
    Senior Member curbtender's Avatar
    Join Date
    Mar 2007
    Location
    SF Bay Area, East bay
    My Bikes
    Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Schwinn Speedster, Mondia Special, Univega Alpina
    Posts
    3,060
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Or maybe try tapping it back with a nail set? Worth a try.

  16. #16
    Senior Member parcoju's Avatar
    Join Date
    Apr 2008
    Posts
    80
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    hammer and nail. mash it to bits. pick up the pieces

  17. #17
    Great State of Varmint Panthers007's Avatar
    Join Date
    Sep 2008
    Location
    Dante's Third Ring
    Posts
    7,481
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Submerge the lock in liquid nitrogen. Hit with hammer. They shatter. As would your frame - so don't submerge it.
    How do you keep an idiot in suspense?

  18. #18
    Senior Member
    Join Date
    Jul 2006
    Location
    Vancouver, BC
    My Bikes
    2007 ICE Trice T; 2008 Brompton M6L; 2009 Surly LHT; 2010 Surly Cross Check
    Posts
    205
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was able to free a lock up with a dremel and a small drill bit--just needs to be slightly larger than the pins. If you drill down through each one, a sprung pin should then fall out. At that point, the lock should turn freely (and never work with a key again, of course). Typically there are 5 pins, shouldn't take more than about 15 minutes.
    2007 ICE Trice T
    2008 Brompton M6L
    2009 Surly Long Haul Trucker
    2008 IRO Mark V (Grip King pedals, Soma Sparrow handlebar, reverse brakes)

  19. #19
    Senior Member bigvegan's Avatar
    Join Date
    Feb 2009
    Posts
    659
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    For the record, if you send your old lock in, they'll send you a new Krypto lock for $18. Not free, but still a pretty good deal.

  20. #20
    Junkmaster
    Join Date
    Aug 2007
    Location
    Arcadia, California
    My Bikes
    Lemond "Alpe d'Huez," several X-marts, and two Trek hybrids
    Posts
    133
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The material of pen cases, polypropylene, is quite resistant to solvents. I would recommend Crank57's approach, with a small hook to the paperclip end.

  21. #21
    GO BIG RED norwood's Avatar
    Join Date
    Nov 2008
    Location
    Hastings,NE
    My Bikes
    1996 Bianchi Veloce 1993 Bridgestone MB-3 1992 Trek 700 1992 Trek 820
    Posts
    678
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I suppose someone should mention that you may want to contact the police before you try some of the above suggestions, just to let them know the situation and what you're up to. It may save you some embarassment, lest they think it's you who's stealing the bike. Then again they may not give a crap. I'm just sayin'...
    1996 Bianchi Veloce
    1993 Bridgestone MB-3
    1992 Trek 700
    1992 Trek 820

  22. #22
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,834
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bigvegan View Post
    For the record, if you send your old lock in, they'll send you a new Krypto lock for $18. Not free, but still a pretty good deal.
    all I see is a reference to the fact that they had the replacement program for a year and they aren't doing it any more. Do you have any more information about an exchange?

  23. #23
    Single-Malt Rider squidie's Avatar
    Join Date
    Feb 2009
    Location
    United Kingdom
    My Bikes
    GT Avalanche 3.0 2009 MTB, Diamondback D10 MTB, Stormer Tangent MTB
    Posts
    99
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Trakhak View Post
    Whoever tried to steal my commuter bike from outside Union Station in DC over the weekend left the stub end of a Bic pen jammed in the lock, so the bike is going to sit there until I figure out how to get the lock open. The lock cylinder turned about 15 degrees before the pen broke off, so it may be impossible to unlock the lock no matter what I do.

    Assuming that the lock might still allow use of the key (since the plastic is presumably holding the pins and tumblers in place, maybe I can grab the solid inner cylinder in the keyway with a vicegrip), is there a solvent that would dissolve the plastic pen barrel thoroughly enough to allow the key to be used?

    Otherwise, I suppose I could rent a cordless angle grinder.

    Any other suggestions?

    Iím for the heating attempt. Is it in a populated area where you could be mistaken for a thief at the time?

  24. #24
    Mixitup
    Join Date
    Oct 2005
    Posts
    172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I would melt and burn as much as possible with a small torch, while the lock is hot, heat the key up while holding it with a vise grip or pliers and insert it.

    The Hot, lock, key and soft plastic may allow you to Turn it to open.

    My 2 cents
    Blending Bikes

  25. #25
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,834
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by A.Winthrop View Post
    .
    Kryptonite offered a one-for-one free exchange for the old
    Bic-vulnerable Kryptonite locks. ...
    What a deal! I wonder if the
    offer still stands? Probably not, but you have to give
    Kryptonite some kudos for making good on their locks.
    As noted above, they did that for a year and then stopped. I see no
    indication on their website that they are doing anything now.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •