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Thread: Best Drill Bit for Electrical Wiring

  1. #1
    I&C Engineer (mostly WWTP) Lakee911's Avatar
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    Default Best Drill Bit for Electrical Wiring

    What's the best type of drill bit for drilling through 2x material to pull electrical wire? Forstener? Spade? Auger? Twist? I've got lots of holes to drill and I'm tired of fooling with the spade bits which on a right angle drill always seem to bind.


    Thanks,
    Jason

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    None of the above...I can't remember the name, but try one with the screw point lead-in. Sort of like a twist drill with a wood screw on the front, it also has some of the features of a Forstner bit. It is designed to cut fast and is self-feeding because of the screw. Interesting to see what others have to say...
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    Jack of all trades frenchie's Avatar
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    Just about every sparky i know, uses auger bits - I'm pretty sure that's what you're describing, Jadnashua?
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    Retired Defense Industry Engineer jadnashua's Avatar
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    Yep, that's it. Just don't hit a nail or screw with one. WHen they're sharp, they slice through really fast. Hit a nail, and it doesn't work well trying to tear the fibers at all.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5
    DIY Senior Member rdtompki's Avatar
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    Some brands of self-feeding augers sold by electrical supply houses have nail-cutting capability. I'm not an electrician, but I've done a lot of rework. When you're drilling through a plate you can't always tell whether there is a nail in the way.

    Rick

  6. #6

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    They're also called ship-auger bits.

    And you can get some that will go through nails with no problems.
    Just my 2 worth.

  7. #7

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    That's what I use too. Mine are getting old. Anyone know of a place to get them sharpened?

    Thanks

    Tom

  8. #8
    In the Trades Bob NH's Avatar
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    I use a Dremel tool with a small round-tip conical stone to sharpen mine.

  9. #9

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    Quote Originally Posted by Bob NH View Post
    I use a Dremel tool with a small round-tip conical stone to sharpen mine.
    Bob,

    For better or worse, I'm a generation X. I generally avoid sharpening things and rely on tools or professionals to do the sharpening. I'll have to find someone locally to sharpen them. I figured you'd need a special machine to sharpen those.

    I have two cases full of those things some that are pretty long. They are extremely useful.

    Thanks for the tip.

    Tom

  10. #10
    I&C Engineer (mostly WWTP) Lakee911's Avatar
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    I'll try to get a hold of some/one!

    Thanks for the advice!

    Jason

  11. #11
    Licensed Electrical Contractor Speedy Petey's Avatar
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    I have about 20 of those in assorted sizes and lengths. I sharpen all of them myself. They come out as good as new. You just have to know how to sharpen them.
    I use a 4" angle grinder with a metal cutting wheel. NEVER sharpen the top. Always the cutting edge down into the throat.

  12. #12

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    I picked up a set of Irwin Speedbor Max bits at BigBlueBox Store last summer to do a project. They are great! Three cutting edges, short enough so even w/o right angle drill I could go streight through joist on 16" center using battery power dirll.


    Check this link for Irwin Information

  13. #13

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    Quote Originally Posted by statjunk View Post
    That's what I use too. Mine are getting old. Anyone know of a place to get them sharpened?

    Thanks

    Tom
    Ask at a woodworking store.. they know people who sharpen saw blades, they can usually do these too.
    Just my 2 worth.

  14. #14

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    Thanks for the tip Sparky. Will do.

    Tom

  15. #15
    Electrical Contractor/Instructor jwelectric's Avatar
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    No matter which bit that is choosen the proper driver for that bit is important.

    See the proper drive force by clicking here

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