User Tag List

Likes Likes:  0
Results 1 to 10 of 10

Thread: Drilling steel fork for brakes

  1. #1
    Join Date
    May 2011
    Location
    Cape Girardeau,Missouri
    Posts
    341
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Drilling steel fork for brakes

    photo.JPG
    Hey y'all,
    Are there any pointers on drilling a fork for a caliper front brake?
    It's a Stainless Llewellyn Max crown.
    anything to avoid/never do again/ not screw up?
    Slow drill speeds, maybe a spade bit.
    How to do a 6mm and an 8mm countersink?
    Best done on a mill?
    Any jig that would help?
    thanks in advance
    Andy Walker
     

  2. #2
    Join Date
    Jul 2009
    Location
    Minneapolis, MN
    Posts
    614
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    I use a 1/4" bit for the front. For the back I use 1/4" for a pilot hole and then a countersinking bit (McMaster Carr 8914A34).

    -Joel
     

  3. #3
    Join Date
    Feb 2009
    Location
    Noblesville, Indiana, United States
    Posts
    1,795
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    A first post and it's the golden fleece for the machine impaired builder. Enco part #368-0116, 1/4" Counterbore. This may be similar to what Joel suggested, or even the same part since I think MC and Enco are linked. If you've got a drill press it's the cats meow. Not so sure how it'd do with a hand drill. I use a 1/4" for the front, 5/16" for the rear, and countersink with this.
     

  4. #4
    Join Date
    May 2011
    Location
    Cape Girardeau,Missouri
    Posts
    341
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    Quote Originally Posted by Craig Ryan View Post
    A first post and it's the golden fleece for the machine impaired builder. Enco part #368-0116, 1/4" Counterbore. This may be similar to what Joel suggested, or even the same part since I think MC and Enco are linked. If you've got a drill press it's the cats meow. Not so sure how it'd do with a hand drill. I use a 1/4" for the front, 5/16" for the rear, and countersink with this.
    Yep, silent no longer:)
    Have a drill press and a vise so I'll get drilling.
    Should I do both holes separately, or drill the 1/4" all the way through so they line up and do the 5/16" with the 1/4" as a center hole?
    cheers
    andy walker
     

  5. #5
    Join Date
    Aug 2008
    Location
    Belen, NM
    Posts
    476
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    Quote Originally Posted by afwalker View Post
    Yep, silent no longer:)
    Have a drill press and a vise so I'll get drilling.
    Should I do both holes separately, or drill the 1/4" all the way through so they line up and do the 5/16" with the 1/4" as a center hole?
    cheers
    andy walker
    Separately. The bit will walk on the back side if you don't have a super rigid- like a mill- setup.

  6. #6
    Join Date
    Feb 2009
    Location
    Scotland
    Posts
    411
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    Silva do a stepped cutter for this if you want to do it in a single operation.
    Steven Shand
    www.shandcycles.com
    Bicycle Manufacture - Scotland, UK

  7. #7
    Join Date
    Jun 2008
    Location
    Cannon County TN
    Posts
    5,748
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    Quote Originally Posted by Craig Ryan View Post
    . Not so sure how it'd do with a hand drill. I use a 1/4" for the front, 5/16" for the rear, and countersink with this.
    i did it with a hand drill (different crown, less work) +once+ and won't be doing it that way ever again. got it a bit wonky.






  8. #8
    Join Date
    Mar 2009
    Location
    Tulsa, Oklahoma, United States
    Posts
    2,986
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    I'd advise smaller pilot holes to start with and don't let the bit or the drilled area get hot. With stainless, if you let anything get hot you're screwed. Slow speed, lots of pressure and coolant of you have it.
    Eric Doswell, aka Edoz
    Summoner of Crickets
    http://edozbicycles.wordpress.com/
    http://www.flickr.com/photos/edozbicycles/
    In Before the Lock

  9. #9
    Join Date
    May 2011
    Location
    Cape Girardeau,Missouri
    Posts
    341
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    I noticed the stainless heat treats itself and hardens. Sure is pretty, but its a lot of work.
     

  10. #10
    Join Date
    May 2011
    Location
    Cape Girardeau,Missouri
    Posts
    341
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drilling steel fork for brakes

    photo (36).JPG
    Holes came out pretty good. Test fit a brake in it and now I get needing to countersink after the 5/16" hole. I'll pick up that Enco/McMaster part as it looks better than a plain countersink.
    Viper red is the color.
    Painting is a whole other art.
    cheers and thanks
    andy walker
     

Similar Threads

  1. Granite Surface Plate: Drilling & Cleaning
    By John Winston in forum The Path
    Replies: 23
    Last Post: 07-26-2014, 01:16 PM
  2. Steel fork steerer question
    By bigbill in forum General Discussion
    Replies: 13
    Last Post: 07-15-2011, 01:33 AM
  3. Steel vs. Carbon Fork
    By haskimoto in forum General Discussion
    Replies: 37
    Last Post: 06-30-2011, 10:52 PM
  4. please help me ... pegoretti steel or carbon fork
    By htono in forum General Discussion
    Replies: 31
    Last Post: 11-26-2010, 11:22 AM

Bookmarks

Bookmarks

Posting Permissions

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