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  • QCTP tool blocks

    From Snag@21:1/5 to All on Wed Sep 25 19:14:52 2024
    I've picked up some more indexable tooling with 10mm shanks and I'm
    going to need more blocks . I'm looking at some A36 and some 1018 cold
    drwan , both reasonably priced . Does either have an advantage over the
    other ?
    --
    Snag
    Voting for Kamabla after Biden
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    you shit your pants .

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  • From Snag@21:1/5 to Jim Wilkins on Thu Sep 26 07:17:01 2024
    On 9/26/2024 6:25 AM, Jim Wilkins wrote:
    "Snag"  wrote in message news:vd291u$3sffa$[email protected]...

      I've picked up some more indexable tooling with 10mm shanks and I'm
    going to need more blocks . I'm looking at some A36 and some 1018 cold
    drawn, both reasonably priced . Does either have an advantage over the
    other ?
    Snag

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

    I think A36 implies hot rolled. If the one you pick has distortion or
    surface finish problems you could anneal it, which has cured mystery
    metal for me.

    Shims that raise the 10mm holders to the same cutting edge height as
    your other tooling might be simpler.

    You're right , the A36 looks like hot rolled . I think I'll get the
    1018 for this job . It's a couple of bucks more than the A36 but that's
    no big deal . As far as tool height , my current tooling is 5/16" and I
    have enough room to drop the holders for the new stuff to centerline .
    I'll just shave the top ledge a little thinner .


    The other day I ran across a watchmakers lathe for sale and have been considering whether or not to buy it. After reading accounts of using
    one I don't think I need to learn precision turning with hand held
    gravers, and my Sears AA has the speed for polishing and drilling small
    deep holes. I turned extra long #0-80 fillister head screws on my 10"
    South Bend and probably won't ever need something that small again.
    Perhaps the price of the lathe would be more usefully spent on a few 5C metric collets.

    Opinions?

    Sounds like you've already got tools to do what the watchmakers lathe
    will do ...


    The watch lathe glue chuck used melted flake shellac to hold an odd
    shaped part that was centered by the tailstock spindle. Alcohol removes
    it when done, and it might be good for holding granite for polishing.

    jsw

    Must be for really small pieces ... I wouldn't trust any kind of glue
    to hold stuff the size of what I'm usually turning .
    --
    Snag
    Voting for Kamabla after Biden
    is like changing your shirt because
    you shit your pants .

    --- SoupGate-Win32 v1.05
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  • From Snag@21:1/5 to Jim Wilkins on Thu Sep 26 17:07:49 2024
    On 9/26/2024 4:33 PM, Jim Wilkins wrote:
    "Jim Wilkins"  wrote in message news:vd3p9b$73cd$[email protected]...

    I just dug out my spare 5C collets to inventory them and found a pot collet bored 2", exactly what I need to complete the steel bandsaw blade guide rollers for the sawmill.
    -------------------------------
    The used 2" collet didn't feel right when tightened. Close examination
    showed flash from the saw cuts folded back on the taper, and compressed almost invisible. Stoning off the flash and raised metal around a ding
    let it close more normally.


    I'm using the new 3" chuck right now to machine a slug for a
    veterinary syringe . I bought several at a yard sale with the idea of
    using them as oilers . The oil turned the barrel seals to goo so I'm
    machining an aluminum slug with an o-ring to replace the goo . Actually
    it'll have two , one to seal the plunger shaft and one for the barrel .
    --
    Snag
    Voting for Kamabla after Biden
    is like changing your shirt because
    you shit your pants .

    --- SoupGate-Win32 v1.05
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  • From Snag@21:1/5 to Jim Wilkins on Thu Sep 26 21:53:29 2024
    On 9/26/2024 8:35 PM, Jim Wilkins wrote:
    "Snag"  wrote in message news:vd4lvm$cvi6$[email protected]...

      I'm using the new 3" chuck right now to machine a slug for a
    veterinary syringe . I bought several at a yard sale with the idea of
    using them as oilers . The oil turned the barrel seals to goo so I'm machining an aluminum slug with an o-ring to replace the goo . Actually
    it'll have two , one to seal the plunger shaft and one for the barrel .

    -----------------
    The type with a narrow-edged plastic piston that slightly expands the
    bore where it contacts seems OK with petroleum products like grease.

    Hydraulic seals are made of Buna-N or nitrile rubber. Viton should also
    work.

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

    These are glass tube assemblies with gaskets . I have some HDPE I
    could make a piston from but I'd have to have 2 thin edges so it would
    be able to suck oil up into the syringe . I think I'll stick with the
    o-ring design . I have metric and SAE assortments - I'd have to go out
    to the shop to see what they're made of and that ain't happenin' tonight .
    This morning I pulled the bed off my truck so I could do some
    finish-up work on the exhaust (finish some welding and fab/install a
    crossover pipe) and so I can remove the axle to take to the shop . I
    have a guy that's done gear set replacements that's going to do mine .
    He got a bunch of Sioux valve/guide/seat tooling in exchange for the
    axle work . It's going in as a 2.73:1 regular differential . It's coming
    home with 3.42's and an Eaton style posi locker .
    And my back hurts . After 4 shots of 99 proof whiskey it still hurts
    but now I don't care .
    --
    Snag
    Voting for Kamabla after Biden
    is like changing your shirt because
    you shit your pants .

    --- SoupGate-Win32 v1.05
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