1. Forum
  2. Usenet
  3. REC.CRAFTS.METALWORKING

  • End mill sharpening fixture

    From Snag@21:1/5 to All on Fri Mar 10 16:32:26 2023
    I'm nearing completion on this project , not a lot left now . All
    that's left is the nut to hold the sleeve in the bottom plate and the
    one for tightening the collet , plus I still need to drill/mill the
    index dimples in the collet holder .
    That completes the fixture , then I need to machine a means to hold
    the grinding wheel . Could go with a dedicated mandrel , could machine washers/plates to use one of the mandrels I already have .
    --
    Snag
    "You can lead a dummy to facts
    but you can't make him think."

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Snag@21:1/5 to Jim Wilkins on Fri Mar 10 21:10:40 2023
    On 3/10/2023 8:26 PM, Jim Wilkins wrote:
    "Snag"  wrote in message news:tugb5g$253gi$1@dont-email.me...

      I'm nearing completion on this project , not a lot left now . All
    that's left is the nut to hold the sleeve in the bottom plate and the
    one for tightening the collet , plus I still need to drill/mill the
    index dimples in the collet holder .
      That completes the fixture , then I need to machine a means to hold
    the grinding wheel . Could go with a dedicated mandrel , could machine washers/plates to use one of the mandrels I already have .
    Snag
    "You can lead a dummy to facts
    but you can't make him think."

    ------------------------

    The collet tightening nut on my commercial fixture has a hex hole for an Allen wrench. The collet nut I made which accepts an insert to center an
    S&D drill bit shank has four radial slots that fit a dog-type wrench, as
    that was simpler to machine, although I have cut internal hexes by using
    a lathe as a shaper. The wrench handle is a V of 3/16" welding rod with
    the ends bent inward to fit holes in the OD of the wrench.

    Since it's small I made it look nice to add to the samples I took to job interviews. At lunch today I was chatting with a retired HR manager and showed her some. She agreed that they were more convincing than anything
    I could write on a resume, since they were physical proof instead of questionable claims. Similar goodies got me into Segway.

    1-1/4" is a common center hole size for surface and tool grinding wheels.

    The wheel I selected is a 6" meant for grinding carbide saw blade
    teeth ... and it has the 1 1/4" hole . The most rigid mandrel I have is
    the one that came with my lathe with a 1/8" slitting blade on it . I
    don't think the loads are going to be all that great ... but since I've
    got lots of stock and plenty of time I'll probably make a dedicated
    mandrel for this task . Short and stubby and very very rigid .
    --
    Snag
    "You can lead a dummy to facts
    but you can't make him think."

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jim Wilkins@21:1/5 to All on Fri Mar 10 21:26:52 2023
    "Snag" wrote in message news:tugb5g$253gi$1@dont-email.me...

    I'm nearing completion on this project , not a lot left now . All
    that's left is the nut to hold the sleeve in the bottom plate and the
    one for tightening the collet , plus I still need to drill/mill the
    index dimples in the collet holder .
    That completes the fixture , then I need to machine a means to hold
    the grinding wheel . Could go with a dedicated mandrel , could machine washers/plates to use one of the mandrels I already have .
    Snag
    "You can lead a dummy to facts
    but you can't make him think."

    ------------------------

    The collet tightening nut on my commercial fixture has a hex hole for an
    Allen wrench. The collet nut I made which accepts an insert to center an S&D drill bit shank has four radial slots that fit a dog-type wrench, as that
    was simpler to machine, although I have cut internal hexes by using a lathe
    as a shaper. The wrench handle is a V of 3/16" welding rod with the ends
    bent inward to fit holes in the OD of the wrench.

    Since it's small I made it look nice to add to the samples I took to job interviews. At lunch today I was chatting with a retired HR manager and
    showed her some. She agreed that they were more convincing than anything I could write on a resume, since they were physical proof instead of
    questionable claims. Similar goodies got me into Segway.

    1-1/4" is a common center hole size for surface and tool grinding wheels.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)