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Best source for really small boring bars?

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  • Best source for really small boring bars?

    I usually get stuff from ENCO, but I can't seem to find a boring bar that's smaller than 1/4". Are there any discount sources for a smaller bar?

    Thanks for the help.

    George

  • #2
    Make one.......

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    • #3
      ... from a drill bit.
      Free software for calculating bolt circles and similar: Click Here

      Comment


      • #4
        Serce - -
        A drill blank is a fine start.
        An endmill is even ready to go.

        because carbide's modulus of elasticity is so high, I might suggest that you learn how to cut a boring facet on a carbide drill blank.

        HSS practical limit is 5 or 6 diameters deep, but carbide will do 10, 11, 12 diam's deep.

        Example: A 3/32 drill blank with a boring facet ground on the end will do holes of ~ 0.095" dia up.

        Hth Ag

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        • #5
          George:
          1) To purchase try MSC not discount but good selection.

          2) other options for making one besides the good ones already mentioned. Grind one from a HSS tool bit or turn one from drill rod heat treat with a small torch and oil and grind finished shape


          kind of like a dis.....



          the HSS one i picked up at a local frea market. A box of bits for a couple bucks a few years back. The round one I made from drill rod.
          Regards
          Falcon Tin
          Ad maiorem dei gloriam - Ad vitam paramus

          Comment


          • #6
            Tin Falcon was nice enough to help the new guy, Evan and wolf were being
            flippant , read between the lines, 4 posts enco primary place he bought stuff. He was a new guy and you guys offered no help. Behavior like that makes some new guys continue to lurk,, who want's be put off like when asking a honest question . allen
            scariest thing to hear " I am from the government and i am here to help"

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            • #7
              Bull crap

              He is on a HSM site, this is a basic tool,He should learn how ro make one.

              Most New guys are like flies here.
              Alguy,I see you are quick to critisize your forum elders, but offered no help to the newby.

              Comment


              • #8
                Have a look on the J & L industrial supply site, I'm pretty sure thay have micro boring bars in the catalogue somewhere there.
                Probably won't be discounted though.

                Peter

                Comment


                • #9
                  Originally posted by Alguy
                  Tin Falcon was nice enough to help the new guy, Evan and wolf were being
                  flippant , read between the lines, 4 posts enco primary place he bought stuff. He was a new guy and you guys offered no help. Behavior like that makes some new guys continue to lurk,, who want's be put off like when asking a honest question . allen
                  Quite right. This is a HSM site, and should be a place where newcomers should feel comfortable to ask advice and very basic questions, and be encouraged rather than blown off.

                  Instead replies like "Make one...from a drill bit" I suggest offering advice on how to do it, or at least a photo of such a cutter.
                  Jim H.

                  Comment


                  • #10
                    Travers Tool Co. www.travers.com used to sell weeny boring bars...they probably still do....

                    I've generally found Travers to be a little cheaper than MSC www.mscdirect.com
                    ----------
                    Try to make a living, not a killing. -- Utah Phillips
                    Don't believe everything you know. -- Bumper sticker
                    Everybody is ignorant, only on different subjects. -- Will Rogers
                    There are lots of people who mistake their imagination for their memory. - Josh Billings
                    Law of Logical Argument - Anything is possible if you don't know what you are talking about.
                    Don't own anything you have to feed or paint. - Hood River Blackie

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                    • #11
                      Thinbit is excellent...the mini bores are nice.

                      http://www.kaisertool.com/

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                      • #12
                        The "make one ... from a drill bit" conveyed the right message but may have been better in one sentence

                        A broken center drill can also make a stout little bar. You'd need to grind the diameter down a bit behind the cutting end, for clearance.

                        If you have any shops in your area, you might visit a few and ask for broken carbide boring bars. I picked up some small Micro100 solid carbide bars that were discards due to damage to the grooving or threading geometry. Not from a shop visit though, they cost me a few bucks each at a used machine dealer.

                        Den

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                        • #13
                          Nothing flippant about my suggestion. It may not have occured to someone that a drill bit is a perfectly good source of high speed steel. The process of making it isn't exactly rocket science. I make the assumption that most people will realize a grinder would be handy. You then use the grinder to remove everything that doesn't look like a boring bar. If you don't know what a boring bar looks like then the problem is much more basic. However, that was NOT implied in the original question.
                          Free software for calculating bolt circles and similar: Click Here

                          Comment


                          • #14
                            I've never purchased boring bars from this outfit, but it was recommended by someone when this question was posted sometime in the past.

                            http://www.truemade.com/boringbars.htm

                            I'm generally in a rush when needing a small boring bar, so I'll make them out of drill rod. I've exceeded all rules of thumb for depth of bore in relation to bar size, but I've not trashed any parts, yet.

                            Orrin
                            So many projects. So little time.

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                            • #15
                              Thanks for the info. I will try to grind my own-- I think I have some HSS round tool blanks somewhere.

                              George

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