Results 1 to 5 of 5

Thread: Bending TI

  1. #1
    WIGGLER
    Reputation: todwil's Avatar
    Join Date
    Feb 2007
    Posts
    767

    Bending TI

    Ok I got to thinking since I now have 7/8" die for my JD2 bender I was wondering if anyone knew how tight of a radius you could bend .035 TI without wrinkling it. I believe the radius is 3" at 90* . Does TI resist better than chromolly? I don't think the bends to make the bars will go past 25-30* or so. O and please save the I wouldn't if you like your teeth comments Ive read plenty of those lately.

    Thanx

    Todd
    PAYASO 36er.....Live the Circus

  2. #2
    Shamisen Appreciator
    Reputation:
    Join Date
    Jan 2004
    Posts
    1,874
    Todd,

    it depends on so many factors, some of which might not be apparent until you actually attempt to bend it. My older generation JD2 model 3 isn't up to the task of bending anything with a CLR under 6" without wrinkling it at least half the time. I understand that some people have much better luck.

    Your success will also largely depend on your material choice. If you're using Sandvik or Haynes CWSR, forget about the tight radius on the JD2. Some of the chinese annealed or half annealed...you'll have better luck. Mystery Chinese tubing...good luck.

    I worked out some JD2 mods last year that let me bend 1.375 on a 7" die without too much trouble. My Anvil benders work well for me for stays so I haven't bothered to revisit bending them with the JD but if I can find some photos I'll share if you're interested.
    Sean Chaney :: Owner/Builder :: Vertigo Cycles LLC
    flickr :: www.vertigocycles.com

  3. #3
    mtbr member
    Reputation:
    Join Date
    Jul 2010
    Posts
    81
    When I did my project I took my tubes to a professional tube bender. I've been told that Ti performs very much like stainless. You have one shot to make the bends correct due to strain hardening.

    Generally you can get more out of annealed than with CWSR, but then you will have to figure out how to heat treat to get back the strength.

    I gave a response to Walt asking how I bent my tubes for my project see the post below.
    (page 3, post #4)
    Fooly's Major Glory

    Dan "Fooly" Acosta

  4. #4
    WIGGLER
    Reputation: todwil's Avatar
    Join Date
    Feb 2007
    Posts
    767
    Dan did happen to remember what bender the person bent your stays with?
    PAYASO 36er.....Live the Circus

  5. #5
    mtbr member
    Reputation:
    Join Date
    Jul 2010
    Posts
    81
    It was big and hydraulic. Something like this

    Benders, Pipe & Tube: Teledyne Pines Horizontal Hydraulic Rotary Tube Bender

    Fooly

Similar Threads

  1. Bending Cogs
    By luvdabeach2001 in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 2
    Last Post: 01-13-2013, 04:43 PM
  2. Bending Bars?
    By telemike in forum General Discussion
    Replies: 4
    Last Post: 07-29-2012, 05:01 AM
  3. At Last - Yet Another Bending Thread
    By TrailMaker in forum Frame Building
    Replies: 26
    Last Post: 06-25-2012, 03:07 PM
  4. Chainring keeps bending
    By Jeremyrp in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 0
    Last Post: 06-05-2012, 04:11 PM
  5. Bending spring
    By Golem builder in forum Frame Building
    Replies: 1
    Last Post: 02-09-2011, 05:24 PM

Posting Permissions

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