split point drill bits

Collapse
This topic is closed.
X
X
 
  • Time
  • Show
Clear All
new posts
  • RickT
    Established Member
    • Jun 2003
    • 175
    • .

    #1

    split point drill bits

    What's a split point drill bit?
    Thanks, guys.
    Rick
  • mahfuz
    Established Member
    • Sep 2003
    • 114
    • Tyler, TX, USA.
    • BT3000

    #2
    The split point drill bits have a very sharp, pointy edge. That makes it easier to drill exactly on mark and not let the bit slip.

    This is just my understanding.
    Mahfuz in Tyler, TX

    Comment

    • LCHIEN
      Super Moderator
      • Dec 2002
      • 22071
      • Katy, TX, USA.
      • BT3000 vintage 1999

      #3
      from popular mechanics site:

      DrillingAlthough there are many kinds of twist-drill bits, there are two basic types used in everyday metal drilling: high-speed steel (HSS) and carbon steel. HSS bits are preferable because they last longer than carbon steel types. A split-point cobalt steel bit is used for drilling stainless steel and other extremely tough metals (Photo 7). The bit’s split point reduces the tendency of a spinning bit to rotate away from the point at which you want to drill—a phenomenon known as walking. The split point also causes the bit to penetrate the metal more quickly and with less force than is needed with other bits. In many cases, using a split point eliminates the need to mark the hole with a centerpunch.
      Loring in Katy, TX USA
      If your only tool is a hammer, you tend to treat all problems as if they were nails.
      BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

      Comment

      • RickT
        Established Member
        • Jun 2003
        • 175
        • .

        #4
        Thanks, guys. Is there a difference between a split point and pilot point drill bit? Does anyone have a picture of one?
        Thanks again,
        Rick

        Comment

        • LarryG
          The Full Monte
          • May 2004
          • 6693
          • Off The Back
          • Powermatic PM2000, BT3100-1

          #5
          IINM a pilot point bit and a split point bit are different designs that are intended to accomplish the same result (prevent "walking" as previously explained).
          Larry

          Comment

          • gmack5
            Veteran Member
            • Dec 2002
            • 1972
            • Quapaw, Oklahoma, USA.
            • Ryobi BT3000SX & BT3100

            #6
            I've made a pdf Drill Press Chart available.

            It contains the recommended speeds and shows all the various types of Drill Bits that are available.

            The Original file was downloaded from Wood Magazine as a "freebie". I just finished going over the Wood Mag's web site and could not find the original file.

            Hope you find it useful.



            Stop thinking why you can't and Start thinking how you CAN!
            Remember, SUCCESS comes in CANS!
            George

            Comment

            • mahfuz
              Established Member
              • Sep 2003
              • 114
              • Tyler, TX, USA.
              • BT3000

              #7
              Good info. I stand corrected, what I described is actually the brad point bits.

              The picture in the PDF file made it clear.

              By the way, IINM = ?
              Mahfuz in Tyler, TX

              Comment

              • LarryG
                The Full Monte
                • May 2004
                • 6693
                • Off The Back
                • Powermatic PM2000, BT3100-1

                #8
                quote:Originally posted by mahfuz

                By the way, IINM = ?
                If I'm not mistaken, that means, "If I'm Not Mistaken."
                Larry

                Comment

                • ElRay
                  Established Member
                  • Jan 2003
                  • 367
                  • NoIL

                  #9
                  quote:Originally posted by LarryG

                  quote:Originally posted by mahfuz

                  By the way, IINM = ?
                  If I'm not mistaken, that means, "If I'm Not Mistaken."
                  FWIW, IMHO, that should have been:

                  IIRC, it means "If I'm Not Mistaken."

                  YMMV, HTH

                  Ray
                  "A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects."
                  --- Robert A. Heinlein

                  Comment

                  • Pappy
                    The Full Monte
                    • Dec 2002
                    • 10490
                    • San Marcos, TX, USA.
                    • BT3000 (x2)

                    #10
                    IIRC = If I Remember Correctly!
                    Don, aka Pappy,

                    Wise men talk because they have something to say,
                    Fools because they have to say something.
                    Plato

                    Comment

                    • LarryG
                      The Full Monte
                      • May 2004
                      • 6693
                      • Off The Back
                      • Powermatic PM2000, BT3100-1

                      #11
                      [quote]quote:Originally posted by ElRay

                      FWIW, IMHO, that should have been:

                      IIRC, it means "If I'm Not Mistaken."

                      YMMV, HTH

                      Ray
                      I got all that except ... what does "Ray" mean?
                      Larry

                      Comment

                      Working...