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QC Gearbox on Craftsman 618??

Discussion in 'ATLAS, CRAFTSMAN & AA' started by Sackett, Feb 10, 2017.

  1. Sackett

    Sackett United States Iron Registered Member

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    Did Atlas , or Craftsman ever offer a qc for the 618??? or someone do one, n plans available??? Just wondering,,would make a really nice add on
     
  2. francist

    francist Canada Active User H-M Supporter-Premium

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    I have seen a home-built version somewhere, but don't ask me where. It was a while ago, and I can't recall on what forum or in what context I ran into it. About the only thing that sticks in my memory about it is that it seemed quite bulky.

    As for a commercial or OEM version, I've not seen one. I'm no expert on the matter though.

    -frank
     
  3. Ulma Doctor

    Ulma Doctor Infinitely Curious Active Member

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  4. DaveInMi

    DaveInMi United States Active Member Active Member

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    Home Shop Machinist or the companion project magazine did a two or three part article on a DIYqcgb for the 618. I have seen back issues for sale on ebay.
     
    Last edited: Feb 11, 2017
  5. wa5cab

    wa5cab Downloads Moderator Staff Member H-M Supporter-Premium

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    The Atlas factory never offered a QCGB for the 618, 101.07301 or 101.21400. Nor for any of the MK2 variants.
     
  6. Sackett

    Sackett United States Iron Registered Member

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    Tks guys, I'll check HSM n nose around a bit
     
  7. clif

    clif United States H-M Supporter - Premium Content H-M Supporter-Premium

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    PM sent, I have plans out of Modeltec July-Dec 1991 that had plans for one.
     
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  8. Takdashark

    Takdashark United States Iron Registered Member

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    Hi Swarf,

    I'm new here and have been taking in all the info, which is slightly overwhelming. Would you be willing to share those plans on the QCGB for the 618 to a newcomer?

    Best,

    Taki
     
  9. Z2V

    Z2V United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Hi Cliff
    I'd be interested in seeing those also if you don't mind.
    TIA
    Jeff
     
  10. Vacuum

    Vacuum United States Iron Registered Member

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    Hello Cliff. I have the feeling you opened a "pandora's" box with the copies of plans you have.
    I am also requesting a set if you have time.
    Of all the accessories and special tooling ATLAS made I do not understand why the QCGB was not offered as a option or add on.
    Thanks
     
  11. clif

    clif United States H-M Supporter - Premium Content H-M Supporter-Premium

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    The 10-12 " QCGB used the same gearing and other parts. These lathes were used by smal;ler shops for work,

    Heck I even got a 3981 lathe with a Corning Glass Works tag attached to it,
    \
    A friend bought a 3986 from a man who got his from Kroger warehouse. he said they used it to turn tow motor armatures.

    The 6-18 would have needed a complete qcgb all it's own, since it uses much smaller change gears than the 10-12 inch lathes do. 24 DP gears on the 6 " vs 16 DP gears on the larger lathes

    Quite an expense for a lathe probably not seen as getting the demand to recoup the costs of tooling up to create the smaller version.
     
  12. wa5cab

    wa5cab Downloads Moderator Staff Member H-M Supporter-Premium

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    I think the same thing. A scaled down version to fit the 6" would likely have cost as much to make as the larger one. And the selling price might have been higher than that for the lathe itself. So very few would likely have been sold.
     
  13. clif

    clif United States H-M Supporter - Premium Content H-M Supporter-Premium

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    No problem, I'm just forwarding the same favor that was given to me.
     
  14. Vacuum

    Vacuum United States Iron Registered Member

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    Thanks to Clif and everyone who commented on this. Boy what a project this is going to be!
     

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