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Hercus 260 (south Bend Gs26-075)

Discussion in 'HERCUS LATHES' started by Boris Ludwig, Nov 2, 2016.

  1. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    I might add that the adapter is only 3" long so the smaller end is just too large to fit.
     
  2. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    [​IMG]

    [​IMG]


    [​IMG]

    Any ideas what do I do now?
     
    Last edited: Apr 10, 2017
  3. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    So I went to a SouthBend Yahoo group and did some searching after rereading some of my posts and responses from helpful blokes and found this...

    [​IMG]


    [​IMG]


    here's a link
    https://xa.yimg.com/df/SOUTHBENDLAT...CAx4MRm3h16egPJvwajxQnLOuujAf-t&type=download

    So although my lathe has a bigger spindle bore, and a 13 1/4" spindle length the nose cone may accept an adapter that has the dimensions listed in the tooling sheet. a slope of .602
     
  4. 4gsr

    4gsr Global Moderator Staff Member H-M Supporter-Premium

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    The .602" slope or taper per foot is almost a Jarno taper. But Jarno tapers are all .600" T.P.F. interested. I have a adapter here I bought for my Sheldon lathe thinking it would work. Fiddling with it the other day I notice it wiggles a little bit at the big end. Now after seeing this, I know now its for a South Bend lathe, not a Sheldon. I may set up on my T & G and re grind the taper to match that in my Sheldon lathe.
     
  5. Mickey Mullins

    Mickey Mullins United States Iron Registered Member

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    Boris,
    Sorry been away at work,so I havent been checking online for awhile THAT adapter you have is wrong I do not know what that is BUT it is not the same as mine,here is some pics,1st is the small end ,2nd is the small end measurement,then 3rd is the large end measurement,then last with the MT 2 dead center installed.
     

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  6. Mickey Mullins

    Mickey Mullins United States Iron Registered Member

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    4gsr,
    Whatever you have is not for a South Bend lathe,I'd say it's what they(who ever sold it to you) said it is.South Bend would've never used a Jarno taper in any lathe spindle.They used Morse tapers,and since Hercus is a DIRECT copy,they used Morse tapers too.Sorry I'm late to this thread.
     
  7. Bob Korves

    Bob Korves H-M Supporter - Premium Content H-M Supporter-Premium

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    I don't think I have seen any D1-4 spindle with anything but a MT 5 taper. The MT 5 to MT 3 adapter extends out from the spindle half an inch (12-13 mm) or so on mine.
     
  8. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    Hi Mickey & Bob,

    The adapter you see in the pictures above is a MT5. Doesn't fit my spindle even though its a D 1-4 . Anyway, the toolmakers at my college ground the adapter to the .602 slope with the correct dimensions. Fits perfectly.
     
  9. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    Here are a couple of photos

    [​IMG]

    [​IMG]
     
  10. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    Mickey, do you have the exact specs for your lathe?

    I wonder what your manual specs say about the internal taper of the spindle...

    Oh BTW thanks for your replies, I appreciate any help.
     
  11. Mickey Mullins

    Mickey Mullins United States Iron Registered Member

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    Glad you were able to get that done.I'm stumped though as to the fit here is a few pics of mine so you can see you are close to factory anyhow.
     

    Attached Files:

  12. Mickey Mullins

    Mickey Mullins United States Iron Registered Member

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    Boris,
    No I'm sorry the manual I have shows a threaded spindle in the diagrams and there isnt a spec sheet in it.
     
  13. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    My next job will be the collet adapter ... and a draw bar
     
  14. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    I'd love to get ahold of a specific manual for this exact model.. I've got some interesting stuff and diagrams with the D 1-4 spindle in exploded view for dismantling but the specs of the spindle taper are absent. When I get some time over the weekend I'll post an attachment for you as it may be helpful for you.
     
  15. Mickey Mullins

    Mickey Mullins United States Iron Registered Member

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    The manual I have is a Government manual but its about the same as the one you posted a few posts ago,except the spindle diagrams,and the are drawings of a threaded spindle,lol.
     
  16. Boris Ludwig

    Boris Ludwig Australia Active Member Active Member

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    Here's the Camlock spindle assembly in exploded view but it's from a geared head lathe so the gears are different to the cone pulleys and the bull gear but it interesting none the less.
     

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    Last edited: Aug 19, 2017

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