Page 1 of 2 12 LastLast
Results 1 to 25 of 30

Thread: Drilling a hole in a magnet?

  1. #1
    Join Date
    Jan 2015
    Location
    Ohio
    Posts
    711
    Post Thanks / Like

    Drilling a hole in a magnet?

    Before I ruin this by experimenting I wondered if anyone here has drilled a hole in a magnet successfully. I need to put a 5/16" hole in this one and thought about starting with a small bit and incrementing my way up?
    Attached Images Attached Images  

  2. #2
    Join Date
    Aug 2018
    Location
    'ta town, KS
    Posts
    283
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    That works.. but is that magnet chipping? It will be challenging to do if it is already chipping

    Sent from my SM-G960U using Tapatalk
    I haven't built anything I can't throw away. Perfection is the journey.

    Mac

  3. #3
    Join Date
    May 2008
    Location
    Orange, TX
    Posts
    17,410
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Never tried it myself but starting small and working up was my first thought as well. Sharp drills and go SLOW would be my suggestion.
    MM200 w/Spoolmatic 1
    Syncrowave 180SD
    Bobcat 225G Plus - LP/NG
    MUTT Suitcase Wirefeeder
    WC-1S/Spoolmatic 1
    HF-251D-1
    PakMaster 100XL
    '68 Red Face Code #6633 project
    Star Jet 21-110

    Save Second Base!

  4. #4
    Join Date
    May 2010
    Location
    ct.
    Posts
    1,266
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Looks like a ceramic (ferrite)magnet.
    You could try grinding a hole with a Dremel
    tool , die grinder, Du-more grinder etc. with a small
    mounted stone.
    Miller a/c-d/c Thunderbolt XL
    Millermatic 180
    Purox O/A
    Smith Littletorch O/A
    Hobart Champion Elite

  5. Likes Denis G liked this post
  6. #5
    Join Date
    Nov 2005
    Location
    ca
    Posts
    96
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Syncrowave 250 w/ coolrunner
    MM210 W/spoolgun
    SP 135
    Victor O/A
    Ramsond cut 50
    Titanium Stick 225.

  7. Likes walker liked this post
  8. #6
    Join Date
    May 2007
    Posts
    3,324
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    i had the same scenario u goin through i think. i had magnets come out of a $53 stabila torpedo . i tired to drill, but couldnt. ive seen torpedo magnets w/ holes through them though

  9. #7
    Join Date
    Oct 2019
    Location
    Australia
    Posts
    195
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    You need a mag drill

  10. #8
    Join Date
    Jan 2015
    Location
    Ohio
    Posts
    711
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Home Depot has some Neodymium magnets with the right size hole in them but they're too strong for what I need. Guess I'll just start with my smallest bit and work up.

  11. #9
    Join Date
    May 2012
    Location
    Ontario, Canada
    Posts
    1,369
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    I'd try an abrasive diamond grit bit.

  12. Likes William McCormick liked this post
  13. #10
    Join Date
    Apr 2006
    Location
    Sydney Australia
    Posts
    1,159
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Quote Originally Posted by 123weld View Post
    i had the same scenario u goin through i think. i had magnets come out of a $53 stabila torpedo . i tired to drill, but couldnt. ive seen torpedo magnets w/ holes through them though
    Some magnets are Cobalt , now that would take some drilling .
    Some however are iron .
    A good guess is better than a bad measurement

  14. #11
    Join Date
    Jan 2015
    Location
    Ohio
    Posts
    711
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    There's some of those over at Home Depot with the right size hole in them. But they're too strong for what I need it for. Guess I'll just start with my smallest bit and gradually go up. Don't know what it's made of, just some cheap magnet so maybe iron.

  15. #12
    Join Date
    Jan 2015
    Location
    Ohio
    Posts
    711
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    I had to give up. A drill bit won't even make a pockmark in the surface. Moving on to find another solution.

  16. #13
    Join Date
    Feb 2016
    Location
    Six Mile SC
    Posts
    35
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Quote Originally Posted by JD1 View Post
    There's some of those over at Home Depot with the right size hole in them. But they're too strong for what I need it for. Guess I'll just start with my smallest bit and gradually go up. Don't know what it's made of, just some cheap magnet so maybe iron.
    When a magnet is too strong, I often coat it with a layer or two of duct tape.
    CG

  17. #14
    Join Date
    Mar 2015
    Location
    Milwaukee, WI
    Posts
    369
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Try using the same type of bit used for drilling ceramic tile.

  18. Likes Capt B, William McCormick liked this post
  19. #15
    Join Date
    Nov 2019
    Location
    North East Ohio
    Posts
    304
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Try https://www.kjmagnetics.com/
    KJ has rare earth mag. many with holes.
    Magnets hate heat once you hit the curie point they lose mag.

  20. Likes William McCormick liked this post
  21. #16
    Join Date
    Aug 2018
    Location
    'ta town, KS
    Posts
    283
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    I have drilled through speaker magnets on multiple occasions. To mount diamonds for dressing the grinder store. Very slow speeds and patience.

    Sent from my SM-G960U using Tapatalk
    I haven't built anything I can't throw away. Perfection is the journey.

    Mac

  22. #17
    Join Date
    Oct 2014
    Posts
    1,025
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    That kind of magnet is not very hard at all.

  23. #18
    Join Date
    Aug 2004
    Location
    North Central Indiana
    Posts
    6,714
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    If that was a solid magnet, I would have tried to spot heat it in the center with a torch, and then drive a small center punch through it.

  24. #19
    Join Date
    Mar 2011
    Location
    Western Washington
    Posts
    9,910
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    A lot of the jewelry crowd uses micro core bits and other assorted diamond covered tooling. you could also rig up a redneck EM setup and bore through with electrical

  25. #20
    Join Date
    Aug 2012
    Location
    AR
    Posts
    1,901
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Quote Originally Posted by tackit View Post
    If that was a solid magnet, I would have tried to spot heat it in the center with a torch, and then drive a small center punch through it.
    As Reebz said, if you heat a magnet past the Curie point (temp), you will no longer have a magnet.

  26. Likes William McCormick liked this post
  27. #21
    Join Date
    Nov 2019
    Location
    North East Ohio
    Posts
    304
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Check out K&J magnet. They have them in all shapes and sizes. Neodymium mags. are amazing.

  28. Likes William McCormick liked this post
  29. #22
    Join Date
    May 2014
    Location
    Manitoba Canada
    Posts
    3,546
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Thinking about those ones that were available with the hole, but too strong. How about a variation on the duct tape idea, and coat them with fiberglass resin? Can't you weaken a magnet by dropping it? Not sure how many million drops that would take if you wanted it to happen though...
    F-225 amp Forney AC Stick
    230 amp Sears AC Stick
    Lincoln 180C MIG
    Victor Medalist 350 O/A

    Les

  30. #23
    Join Date
    Oct 2019
    Location
    Australia
    Posts
    195
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    Q. What do you get when you heat a rare earth magnet?

    A. Rare earth.

  31. #24
    Join Date
    Sep 2014
    Posts
    1,441
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    I would go with a wet diamond bit.


    https://www.amazon.com/Diamond-Drill...6787867&sr=8-7


    Sincerely,

    William McCormick
    If I wasn't so.....crazy, I wouldn't try to act normal, and you would be afraid.

  32. #25
    Join Date
    Sep 2014
    Posts
    1,441
    Post Thanks / Like

    Re: Drilling a hole in a magnet?

    These look better.

    https://www.amazon.com/uxcell-Diamon...WT5PZJ0KS&th=1

    Sincerely,

    William McCormick
    If I wasn't so.....crazy, I wouldn't try to act normal, and you would be afraid.

  33. Likes ronsii liked this post

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Page generated in 1,611,293,455.63149 seconds with 15 queries