User Tag List

Results 1 to 14 of 14

Thread: Drill Bits

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Join Date
    Apr 2010
    Location
    Tallahassee, FL
    Posts
    1,637
    Post Thanks / Like
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)

    Default Drill Bits

    What are you guys using for drill bits for pinning, bottle bosses, whatever? I've been using Enco import bits for pinning, jobber length, don't remember what angle, black oxide; not too impressed, they seem to dull very quickly, break easily. I'm about to freshen my supply and am leaning towards 135 degree split points, screw machine length, black oxide, Enco again, possibly Hertel brand (import, or domestic)

    Even the larger sizes for bosses (std bits from Lowes or Home Depot) walk enough to annoy (yes, even after spotting) so I figure I'll use the same type as above....or just use spotting drills.

    Or would straight flute, stub length be the ticket, or perhaps something else?

    Interested in feedback, recommendations, reactions.

    Thanks
    John Clay
    Tallahassee, FL
    My Framebuilding: https://www.flickr.com/photos/21624415@N04/sets

  2. #2
    Join Date
    Jun 2008
    Location
    Minneapolis, MN
    Posts
    1,839
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)

    Default Re: Drill Bits

    Try center drills.
    Attached Images Attached Images

  3. #3
    Join Date
    Jul 2009
    Location
    Minneapolis, MN
    Posts
    614
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    Center drills are awesome. For other drills never go cheap. Cobalt drills aren't that much more and last a lot longer. Screw-length is often nice.

    Enco or McMaster Carr have plenty for decent prices.

    Good technique will also greatly lengthen drill life.
    Joel Greenblatt

    Website

    Flickr

  4. #4
    Join Date
    Aug 2012
    Location
    Bozeman
    Posts
    205
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    +1 on the center drills, especially for bottle bosses.
    Learning to sharpen bits was an awesome decision as well.
    -Adam Sklar
    Sklar Bikes LLC
    http://sklarbikes.com
    FaceSpace
    Instagram

  5. #5
    Join Date
    Aug 2012
    Location
    Los Gatos, CA
    Posts
    339
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    Another +1 for the center drills for starting, and for thin wall tubes and shallow holes I always finish with "stub drills" (short length bits, less drill wander).

    2
    Minds Create, Hands Build.
    Ride Fast, Ride FARR

  6. #6
    Join Date
    Apr 2010
    Location
    Tallahassee, FL
    Posts
    1,637
    Post Thanks / Like
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    Fantastic! Thanks for the photo Curt. That's the answer - I shall make the switch to center drills.

    Sharpening my conventional twist bits....I've tried to do that freehand and not been too successful but it seriously grates me to toss a bit for the loss of an edge. How is it done?
    John Clay
    Tallahassee, FL
    My Framebuilding: https://www.flickr.com/photos/21624415@N04/sets

  7. #7
    Join Date
    Apr 2009
    Posts
    2,030
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    john grinding a drill is not easy on small bits if your learning

    get yourself a big old drill like 1" in diameter then get yourself a book describing drill nomenclature

    try to sharpen the big drill ,but basically as an apprentice we were taught both chisel edges should be equal otherwise your drill is going off centre and going to cut big

    drill sharpening picture.jpg

    drill sharpening motions.jpg

    once you get the big drill down as its easier to see whats happening ,move onto smaller drills

  8. #8
    Join Date
    Apr 2013
    Location
    Bend, Oregon
    Posts
    70
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    Ohhhhh…Me Likey!
    Gregory White
    Magic Cycle Werks
    www.MagicCycleWerks.com

  9. #9
    Join Date
    Feb 2012
    Location
    Bridgeton, NJ
    Posts
    101
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Drill Bits

    I sharpened all my cheap drill bits with a Drill Doctor. They work better than they did when they were new. https://www.drilldoctor.com/
    Dave Saul
    Starr Cycles (not a real company, but I need to put something on the downtube)
    Bridgeton, NJ
    http://www.flickr.com/photos/starrcycles/

Similar Threads

  1. Keene Rim Drill
    By ericpmoss in forum The OT
    Replies: 3
    Last Post: 03-20-2014, 05:42 PM
  2. Drill speed
    By steve garro in forum The Path
    Replies: 35
    Last Post: 11-14-2012, 01:12 AM
  3. Drill Presses!
    By ToddFarr in forum The Path
    Replies: 0
    Last Post: 09-18-2012, 02:12 PM
  4. Drill the BB for chainstays or no? (newbie question)
    By Derek Raymond in forum VSalon Pro-Bicycle Tech
    Replies: 0
    Last Post: 06-03-2011, 02:37 PM
  5. Honjo fender question - drill before or after powdercoat?
    By sbornia in forum General Discussion
    Replies: 12
    Last Post: 07-12-2010, 10:01 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
  •