Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    aka co-op commando infestedguy1's Avatar
    Join Date
    Oct 2003
    Location
    atlanta, ga.
    My Bikes
    surly steamroller, spicer track
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    stripped seatpost clamp bolt, help!

    i was wondering if any of you have ever experienced a seat post clamp bolt (allen head) stripping to the point where you can't remove it. i need to get the post out of my frame, but can't because i can't loosen the bolt. i have a new clamp to replace this one, so trashing the clamp isn't a big deal. i thought of cutting the bolt in half with a dremal tool or hacksaw (there is enough room to get in there to cut it without damaging the frame or post), which seems like it would release the clamp allowing me to remove it. do any of you have a better idea on how to do this? any help would be greatly appreciated.
    turning the 0mph fallover into an artform

  2. #2
    Senior Member MudPie's Avatar
    Join Date
    May 2004
    Location
    Southern California
    Posts
    1,874
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by infestedguy1
    i was wondering if any of you have ever experienced a seat post clamp bolt (allen head) stripping to the point where you can't remove it. ...
    Are the threads stripped or the Allen head socket messed up?

  3. #3
    aka co-op commando infestedguy1's Avatar
    Join Date
    Oct 2003
    Location
    atlanta, ga.
    My Bikes
    surly steamroller, spicer track
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    sorry, shouldve clarified, the allen head socket is stripped. the threads and all are fine, just useless since i can't get a wrench to take the bolt out. so yeah, the head socket itself is messed up.
    turning the 0mph fallover into an artform

  4. #4
    lover ....
    Join Date
    May 2004
    Posts
    243
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Drill out the allen bolt head using a 5.5mm or 6.5mm drill bit (depending on whether you used a 5mm or 6mm hex key on it initially. You will be surpirsed how easily it will drill out. That will be a lot easier than trying to cut the bolt.
    Riding a bike is not a fashion show

    Super commuter, grease freak, lover ...

  5. #5
    Senior Member MudPie's Avatar
    Join Date
    May 2004
    Location
    Southern California
    Posts
    1,874
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by infestedguy1
    sorry, shouldve clarified, the allen head socket is stripped. the threads and all are fine, just useless since i can't get a wrench to take the bolt out. so yeah, the head socket itself is messed up.
    You can use a "screw extractor" to remove it. They're sometimes referred to by their trade name "E-Z Out". To use one, you'll need to drill a small pilot hole, then insert the extractor and turn. The extractor looks like a pointed twisted cone, but you operate it by turning it counterclockwise. As it's turned, the cone embeds itself deeper and soon, you'll be turning the screw.

    Sears makes an extractor that doesn't require a pilot hole. You just sort of jam this bit into the messed up head and turn it counterclockwise.

    Of course, both these methods will mess up the head and you'll need a new bolt.

    Perhaps can you jam something into the head, like a screwdriver and use a wrench to grasp the screwdriver shaft and turn?

  6. #6
    aka co-op commando infestedguy1's Avatar
    Join Date
    Oct 2003
    Location
    atlanta, ga.
    My Bikes
    surly steamroller, spicer track
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks for the info, both of these methods seem like they would work. i just don't want to mess up anything other than the clamp and bolt. thanks again.
    turning the 0mph fallover into an artform

  7. #7
    Senior Member mtbikerinpa's Avatar
    Join Date
    Dec 2004
    Location
    PA
    My Bikes
    92 Giant Sedona ATX Custom
    Posts
    1,667
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    While I would reccomend the extractors, if you have access to a Dremel Moto tool, the cutoff wheel fits nicely between the clamp faces to get the bolt. This is the fastest method out of the choices, but you do have to have a steady enough hand to not let it skip.
    Aviation Mechanic, Bike racer, Fitness Equipment Restorer

    http://pedalmybike.com/userTrackies/myTrackie4758.jpg[/url]

  8. #8
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    23,109
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by infestedguy1
    sorry, shouldve clarified, the allen head socket is stripped. the threads and all are fine, just useless since i can't get a wrench to take the bolt out. so yeah, the head socket itself is messed up.
    Before you do anything invasive, try a brand new allen wrench. That'll work more often than you'd think. Throw your old allen wrench away because it's worn out and will continue to round out more bolts every time that you use it.

  9. #9
    la vache fantôme phantomcow2's Avatar
    Join Date
    Aug 2004
    Location
    NH
    Posts
    6,266
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yep...bust out that drill and grind the sucker down . A great way to relieve stress.

  10. #10
    Senior Member Ziemas's Avatar
    Join Date
    Nov 2004
    Location
    Riga, Latvia
    Posts
    9,974
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I had the same problem. I filed down two flat spots on tboth heads. Visegiped both ends and voila!

  11. #11
    Listen to me powers2b's Avatar
    Join Date
    Nov 2004
    Location
    Lexus Texas
    Posts
    2,791
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just use the dremel tool or hacksaw and cut it off

  12. #12
    aka co-op commando infestedguy1's Avatar
    Join Date
    Oct 2003
    Location
    atlanta, ga.
    My Bikes
    surly steamroller, spicer track
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks for all the advice, i appreciate it. its a brand new frame, spicer track, and i really DONT want to mess anything up. thanks again.
    turning the 0mph fallover into an artform

Posting Permissions

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