Quantcast
Quick Drilling Question
+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: Quick Drilling Question

  1. #1
    Senior Member
    stereo.pete's Avatar
    Join Date
    Mar 2011
    Location
    Chicago
    Posts
    1,752

    Quick Drilling Question

    Quick question for you pros out there, I started drilling pin holes and a lanyard loop hole in my next knife. For the lanyard loop I started with an 1/8th inch pilot hole and then when I went to drill through that with a 1/4" bit I snapped the bit off and I have two huge burrs sticking out. Two questions, 1: What did I do wrong and 2: what can I do to fix this?


    Twitter: @PeterDaEater

  2. #2
    Senior Member
    Join Date
    Aug 2011
    Location
    Lexington, KY
    Posts
    1,208
    Looks like you need to go slower. Were you using a press or hand-held drill?

  3. #3
    Senior Member
    stereo.pete's Avatar
    Join Date
    Mar 2011
    Location
    Chicago
    Posts
    1,752
    Hand-held drill (no press at the moment) and I started slow but the bit wasn't moving at all so I slowly increased speed and then it snapped.
    Twitter: @PeterDaEater

  4. #4

    Join Date
    May 2011
    Location
    Top of Georgia
    Posts
    1,218
    Looks like you have quite a bit of the bit sticking out? It's hard for me to see in the picture. If so, clamp on it with some vice grips, use a propane torch and heat up the steel around (before you ask, no not that hot). Back it out by hand. Avoid any thing called an e-z-out at all costs. Next time, slow speed, slow pressure, use a lube. I like the wax like stuff. Maybe consider getting a drill press stand that accepts a hand drill. Not that expensive and cheaper than a drill press if funds are low.

    -AJ

  5. #5
    Senior Member
    stereo.pete's Avatar
    Join Date
    Mar 2011
    Location
    Chicago
    Posts
    1,752
    Quote Originally Posted by ajhuff View Post
    Looks like you have quite a bit of the bit sticking out? It's hard for me to see in the picture. If so, clamp on it with some vice grips, use a propane torch and heat up the steel around (before you ask, no not that hot). Back it out by hand. Avoid any thing called an e-z-out at all costs. Next time, slow speed, slow pressure, use a lube. I like the wax like stuff. Maybe consider getting a drill press stand that accepts a hand drill. Not that expensive and cheaper than a drill press if funds are low.

    -AJ
    AJ, the burr sticking out is actually the metal from the knife blank. The bit came out nice and clean, I may just have to cut that end off and and abandon the lanyard hole. Great idea for a drill press stand, I will start looking for one.
    Twitter: @PeterDaEater

  6. #6

    Join Date
    May 2013
    Posts
    32
    What type of steel? If it's something that work hardens, you must use a good, sharp high speed steel bit, slow speed drill, and lubricant. A hand held drill will be WAY too fast unless you have a very old one that has gear reduction (WWII vintage). A drill press is a much better tool for this job, as you can slow it down properly.

    Standard drill bits don't do what well in hard steel, and HSS bits are cheap enough.

    Peter

  7. #7
    DevinT's Avatar
    Join Date
    Mar 2011
    Location
    Panaca, NV.
    Posts
    745
    Too much pressure and not enough speed. A little smaller pilot hole will also help.

    Hoss

  8. #8

    Join Date
    May 2011
    Location
    Top of Georgia
    Posts
    1,218
    I'm not a knife maker but I've wondered, why are you guys always high on HSS tool bits? I would go with cobalt. Why don't you guys use cobalt bits?

    -AJ

  9. #9
    DevinT's Avatar
    Join Date
    Mar 2011
    Location
    Panaca, NV.
    Posts
    745
    Cobalt just means a better HSS with cobalt as one of the alloys. The brand or manufacture seems to make a bigger difference for me. There are also different grinds and spirals/flutes made for differing materials, matching the drill bit with the job and machine also helps.

    Love and respect

    Hoss

  10. #10

    Join Date
    May 2011
    Location
    Top of Georgia
    Posts
    1,218
    Got it. Thanks.

    -AJ

+ Reply to Thread

Posting Permissions

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