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What kind of tool is this?

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  • What kind of tool is this?

    Hey guys, I bought a box of old reamers for $5 from a local toolguy on Kijiji, I was there for a toolbox and took a look around his junk. These were in the box;



    My best guess is they're a type of indexable drill bit, or a boring tool? The hole at the end seems to be designed to hold a tool bit, but there's no apparent way to fasten it in. No set screws or anything. I think its a MT1 on the end.

    In any case, I'm curious what they're for and what they would have been used for if they are a specialty tool. Probably won't find a use for them, good shanks for something maybe.

  • #2
    Are those gun drills?
    Len

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    • #3
      Not gun drills. I wonder if they went to a Moore jig bore?
      Kansas City area

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      • #4
        Pilots for a Black and Decker valve seat grinder
        I cut it off twice; it's still too short
        Oregon, USA

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        • #5
          Originally posted by Tim Clarke View Post
          Pilots for a Black and Decker valve seat grinder
          You're absolutely right. Looks like they're meant to hold a small round grinding stone.

          Thanks for the help guys, nice catch Tim. I guess I can see how they made it into the junk reamer box.

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          • #6
            Good one Tim --- damn i should have had that but was drawing a blank because they look so different from the ones I grew up with which I believe were sioux...

            got fixated trying to figure out what those spirals are for... ?

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            • #7
              [

              got fixated trying to figure out what those spirals are for... ?[/QUOTE]

              The stone carriers had a bronze bushing that went over the pilot, maybe the grooves were a place for the inevitable grit to go. I think the later stone carriers had ball bearings, kinda like the Sioux you were talking about.
              I cut it off twice; it's still too short
              Oregon, USA

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