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  • Live Center

    From Pedro Agtuca@21:1/5 to All on Sat Feb 18 14:31:40 2023
    I am trying to buy a live center for my Dalton lot 2 Lathe. The stamping on my on dead center is marked MT 2. My drill chuck also has a MT2 stamping. When I order from Amazon the MT2 Live Centers, it doesn’t fit. I tried several manufactures, and none
    fit, they are all too loose. If someone knows what I am doing wrong please help. Here are my measurements:


    Drill Chuck
    .750 Large end
    .610 Small end
    2.266 Shank Length

    Dead center
    .725 large end
    .585 small end
    4.185 Length

    Tailstock MT Spindle Shaft
    .722 Hole Bore
    .125 Key Grove
    1.125 Diameter
    6.010 Length

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  • From Bob La Londe@21:1/5 to Pedro Agtuca on Sat Feb 18 16:53:34 2023
    On 2/18/2023 3:31 PM, Pedro Agtuca wrote:
    I am trying to buy a live center for my Dalton lot 2 Lathe. The stamping on my on dead center is marked MT 2. My drill chuck also has a MT2 stamping. When I order from Amazon the MT2 Live Centers, it doesn’t fit. I tried several manufactures, and
    none fit, they are all too loose. If someone knows what I am doing wrong please help. Here are my measurements:


    Drill Chuck
    .750 Large end
    .610 Small end
    2.266 Shank Length

    Dead center
    .725 large end
    .585 small end
    4.185 Length

    Tailstock MT Spindle Shaft
    .722 Hole Bore
    .125 Key Grove
    1.125 Diameter
    6.010 Length


    It sounds like you don't have a standard Morse taper. A quick search
    engine check on-line says the big end of an MT2 is about .700 and a #3
    is much larger at 0.938. I just looked at my copy of Machinery's
    Handbook and it says 0.700 and 0.938 respectively at the gage line, so
    the Internet is right.

    Your options may include to make your own tapers to fit, make or modify
    a tail stock barrel that works with a standard Morse taper, or find out
    if your lathe used some other taper and hope there is tooling still
    available in that form.

    You might see if somebody like Vintage Machinery has any more
    information on your lathe. http://vintagemachinery.org/mfgIndex/detail.aspx?id=2756

    Also lathes.co.uk if I recall may have some information. http://www.lathes.co.uk/dalton/page2.html

    Here is an owners group you might also check out. https://groups.io/g/DaltonLathes




    --
    Bob La Londe
    CNC Molds N Stuff


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  • From Jim Wilkins@21:1/5 to All on Sun Feb 19 07:36:00 2023
    "Pedro Agtuca" wrote in message news:[email protected]...

    I am trying to buy a live center for my Dalton lot 2 Lathe. The stamping on
    my on dead center is marked MT 2. My drill chuck also has a MT2 stamping.
    When I order from Amazon the MT2 Live Centers, it doesn’t fit. I tried several manufactures, and none fit, they are all too loose. If someone knows what I am doing wrong please help. Here are my measurements:


    Drill Chuck
    .750 Large end
    .610 Small end
    2.266 Shank Length

    Dead center
    .725 large end
    .585 small end
    4.185 Length

    Tailstock MT Spindle Shaft
    .722 Hole Bore
    .125 Key Grove
    1.125 Diameter
    6.010 Length

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

    If someone reamed the spindle bore to a different taper the large and small
    end ODs may not match a standard but the taper per inch should. You can determine it from the insertion depth of cylinders of known diameter, such
    as ground drill rod, or two different sized washers on threaded rod, with
    their separation adjusted to fit the bore without play, preferably near both ends.

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  • From Leon Fisk@21:1/5 to Pedro Agtuca on Sun Feb 19 09:19:36 2023
    On Sat, 18 Feb 2023 14:31:40 -0800 (PST)
    Pedro Agtuca <[email protected]> wrote:

    I am trying to buy a live center for my Dalton lot 2 Lathe. The stamping on my on dead center is marked MT 2. My drill chuck also has a MT2 stamping. When I order from Amazon the MT2 Live Centers, it doesn’t fit. I tried several manufactures, and none
    fit, they are all too loose. If someone knows what I am doing wrong please help. Here are my measurements:


    Drill Chuck
    .750 Large end
    .610 Small end
    2.266 Shank Length

    Dead center
    .725 large end
    .585 small end
    4.185 Length

    Tailstock MT Spindle Shaft
    .722 Hole Bore
    .125 Key Grove
    1.125 Diameter
    6.010 Length

    There's a nice old book here with diagrams and measurements for Morse
    tapers and others that may help🤷

    https://archive.org/details/americanmachinis00colv/page/348/mode/2up

    Morse has a Short Taper spec too...

    --
    Leon Fisk
    Grand Rapids MI

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  • From Bob La Londe@21:1/5 to Leon Fisk on Sun Feb 19 08:52:45 2023
    On 2/19/2023 6:19 AM, Leon Fisk wrote:


    There's a nice old book here with diagrams and measurements for Morse
    tapers and others that may help🤷

    https://archive.org/details/americanmachinis00colv/page/348/mode/2up

    Morse has a Short Taper spec too...


    Very nice. I downloaded a copy for my library. Thank you.


    --
    Bob La Londe
    CNC Molds N Stuff


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  • From Gerry@21:1/5 to [email protected] on Sun Feb 19 23:38:07 2023
    On Sun, 19 Feb 2023 07:36:00 -0500, "Jim Wilkins"
    <[email protected]> wrote:

    "Pedro Agtuca" wrote in message >news:[email protected]...

    I am trying to buy a live center for my Dalton lot 2 Lathe. The stamping on >my on dead center is marked MT 2. My drill chuck also has a MT2 stamping. >When I order from Amazon the MT2 Live Centers, it doesn�t fit. I tried >several manufactures, and none fit, they are all too loose. If someone knows >what I am doing wrong please help. Here are my measurements:


    Drill Chuck
    .750 Large end
    .610 Small end
    2.266 Shank Length

    Dead center
    .725 large end
    .585 small end
    4.185 Length

    Tailstock MT Spindle Shaft
    .722 Hole Bore
    .125 Key Grove
    1.125 Diameter
    6.010 Length

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

    If someone reamed the spindle bore to a different taper the large and small >end ODs may not match a standard but the taper per inch should. You can >determine it from the insertion depth of cylinders of known diameter, such
    as ground drill rod, or two different sized washers on threaded rod, with >their separation adjusted to fit the bore without play, preferably near both >ends.
    Is it possible that he has the tailstock ram retracted to the point
    that the live centre is being ejected by the ram feed screw - the tip
    on the small end of the taper may be a little longer than on the other
    items. I have some home made shanks where the tip is not long enough
    (I made them a long time ago!)

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  • From Jim Wilkins@21:1/5 to All on Mon Feb 20 11:21:38 2023
    "Gerry" wrote in message news:[email protected]...

    Is it possible that he has the tailstock ram retracted to the point
    that the live centre is being ejected by the ram feed screw - the tip
    on the small end of the taper may be a little longer than on the other
    items. I have some home made shanks where the tip is not long enough
    (I made them a long time ago!)

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

    I made that mistake once. A little blob of MIG weld on the end fixed it.

    The OP e-mailed me that it might be Jarno #6, and I sent a link to a center
    on eBay.

    My mill has a B&S #7 taper which is hard to find.

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  • From David Billington@21:1/5 to Jim Wilkins on Mon Feb 20 17:16:23 2023
    On 20/02/2023 16:21, Jim Wilkins wrote:
    "Gerry" wrote in message
    news:[email protected]...

    Is it possible that he has the tailstock ram retracted to the point
    that the live centre is being ejected by the ram feed screw - the tip
    on the small end of the taper may be a little longer than on the other
    items. I have some home made shanks where the tip is not long enough
    (I made them a long time ago!)

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

    I made that mistake once. A little blob of MIG weld on the end fixed it.

    The OP e-mailed me that it might be Jarno #6, and I sent a link to a
    center on eBay.

    My mill has a B&S #7 taper which is hard to find.

    I've been wondering if the 2 items he has marked MT2 actually fit the
    quill or if they just came with the lathe.

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