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  1. #1
    Join Date
    Aug 2006
    Location
    Browns Valley, California
    Posts
    1,713

    Default 118 vs. 135 point angles on twist drills.

    It's time to buy a new set of drill bits for the Gadget Garage. Everything I have now is sharpened to a 118 included angle. What's the wisdom in 135 points? I've never had problems with the 118's, but I've never used 135's. What would you guys buy and how come?

    Thanks, as usual!

    Hank

  2. #2
    Join Date
    Feb 2007
    Location
    now in Orlando!!!!
    Posts
    559

    Default

    hankj, 118 is the most efficient angle for drilling metal, 135 is better for harder steels/stainless. There are some 135 premium bits out there that are really bad, they tend to make an oval hole, I bought some Bluemole bits that did that. I would stick with the 118's, and maybe consider a 'screwmachine' length over Jobber length as they are 1/2 the length and don't tend to flex or break as easy. Hope this helps, Paul

  3. #3
    Join Date
    Aug 2004
    Location
    guilford, ct
    Posts
    858

    Default

    hey hank go the extra mile and get cobalt.
    Trailblazer 302g
    coolmate4
    hf-251d-1
    super s-32p
    you can never know enough

  4. #4
    Join Date
    Aug 2006
    Location
    Browns Valley, California
    Posts
    1,713

    Default

    Thanks, guys.

    I like screw machine length for that reason - stiff! I'm looking at a USA set from ENCO from 1/16" to 1/2" by 64ths. All my large bits are in good shape, and I'm glad, 'cause them bad boys are EXPENSIVE!

    Hank

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