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  1. #1
    Join Date
    Jan 2010
    Location
    Leura, NSW
    Posts
    6

    Default 4MT to 4C Collet Adapter for 260G & 3MT to C Collet Adapt for Milling Attachment WANT

    Wanted to buy for 260 and Milling Attachment.
    4MT to 4C Collet Adapter, Spindle Thread Protector, Draw Bar, Handwheel etc or components to use 4C Collets in a 260 Spindle.
    and
    3MT to C Collet Adapter, Draw Bar, Handwheel etc of components to use C Collets in Hercus Milling Attachment.
    I'm located in the Blue Mountains, NSW
    Regards,
    Graeme

  2. #2
    Join Date
    May 2012
    Location
    Hobart
    Posts
    18

    Default

    Quote Originally Posted by graeme1938 View Post
    3MT to C Collet Adapter, Draw Bar, Handwheel etc of components to use C Collets in Hercus Milling Attachment.
    I'm located in the Blue Mountains, NSW
    Regards,
    Graeme
    3mt / 3c showing in Gumtree. Search for Hercus

  3. #3
    Join Date
    Jan 2010
    Location
    Leura, NSW
    Posts
    6

    Default Thanks Jon

    Quote Originally Posted by Jon.holmes View Post
    3mt / 3c showing in Gumtree. Search for Hercus
    . Hi Jon, Thank you for the lead. Now to find the 4M to 4c adapter

  4. #4
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,132

    Default

    Quote Originally Posted by graeme1938 View Post
    3MT to C Collet Adapter, Draw Bar, Handwheel etc of components to use C Collets in Hercus Milling Attachment.
    I'm confused by this. Do you mean the Hercus milling machine, rather than milling attachment? I have the milling attachment for my Hercus 260. The tool holding method used with it is totally independent of the attachment. I use ER40.
    Chris

  5. #5
    Join Date
    Jan 2010
    Location
    Leura, NSW
    Posts
    6

    Default Hercus 260G Milling Attachment

    Quote Originally Posted by jack620 View Post
    I'm confused by this. Do you mean the Hercus milling machine, rather than milling attachment? I have the milling attachment for my Hercus 260. The tool holding method used with it is totally independent of the attachment. I use ER40.
    No, not a milling machine.
    The complete original milling attachment tooling available included a vertical slide, machine vise and a simple indexing head. The milling attachment vertical slide replaces the tool post, this vertical slide accepts either the vice or a simple dividing head that work piece is held in. This simple dividing head has a 3MT and uses a C collet via a 3MT to C Collet adapter to hold the work so that it can be indexed. Rigidity is not one of its virtues. I bought a Tee-Slot Cross Slide for the times I'll need extra capacity or rigidity (within the machine tools limitations) and will remove and replace the taper turning attachment and its cross slide when I want to use it. I have a second vertical milling attachment slide that I'll machine the base and mount to a plate with key to locate in the Tee-Slot Cross Slide for extra rigidity when I want to take slightly heavier cuts or use tougher material in the indexing head.
    Yes a cutting tool held in the headstock by either a chuck or collet is independant of the simple indexing head. I have a set of imperial Hardinge 4C collets that I am looking for a 4MT to 4C adaptor to hold tools or work pieces in the headstock. I agree that ER40 have a wider range and are easier to get but I'd prefer original attachments for the lathe and I already have the 4C Collets. I'll get cheap ER40 collets and a chuck at some point.
    I'd like a smaller Milling Machine for home but don't have the space at the moment.
    Regards,
    GraemeMilling Attachment 1.jpgMilling Attachment 2.jpgMilling Attachment 3.jpg

  6. #6
    Join Date
    Aug 2015
    Location
    Adelaide
    Posts
    202

    Default

    Hi Graeme

    I have taken some photos and added dimensions for the draw tubes if you need to make them, Not sure if you will find any originals of these but you never what people have in their sheds and are willing to part with.

    The dimensions are in metric but these would be imperial sizes originally and the only real critical dimension would be the thread, overall length could vary a little bit either way and wouldn't make much difference

    I have made a few 3c draw tubes for my 0 mill out of 20 mm tube with 2.5 mm wall thickness and then made a spigot to go on the back for the step and to hold the handle.

    As for thread dimensions for the collets I looked around on the net for the collet dimensions but I can't find where I found the info now but its out there.

    I have added photos of the handle I made for the 0 mill spindle draw tube as they went with a different style on the later mills with notches instead of knurled finish.

    Steve
    Attached Images Attached Images

  7. #7
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,132

    Default

    OK, now I see what you mean. I'm not lucky enough to have the dividing head.

    Quote Originally Posted by graeme1938 View Post
    I have a second vertical milling attachment slide that I'll machine the base and mount to a plate with key to locate in the Tee-Slot Cross Slide for extra rigidity when I want to take slightly heavier cuts or use tougher material in the indexing head.
    That's what I have done. I have a Myford milling attachment that bolts directly to the slots in the cross-slide. I also made an adaptor so I can mount the Hercus milling attachment to the slots too. But I usually just use the Myford one. I also have a 200mm angle plate that provides more rigidity (but no vertical movement) when needed.
    Chris

  8. #8
    Join Date
    Aug 2015
    Location
    Adelaide
    Posts
    202

    Default

    Found the collet sizing
    Attached Images Attached Images

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