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  1. 15th March 2012, 01:12 AM #1
    TomW
    TomW is offline Intermediate Member
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    Default Spindle taper size

    I am having problems with the taper in the headstock spindle of the Hercus 12"x40"
    A no 5 morse is too big and a no 4 morse too small It seems to be something in between. Am now wondering if its a morse at all Any help appreciated.
  2. 15th March 2012 01:12 AM # ADS
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  3. 15th March 2012, 04:02 AM #2
    pipeclay
    pipeclay is offline GOLD MEMBER
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    Default

    It maybe a 4 1/2.
    Are you able to get calipers in to gauage bore sizes for a comparison check?
  4. 15th March 2012, 10:38 AM #3
    Anorak Bob
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    Tom,

    Have a look at the scanned McPhersons catalogue pages in JohnAXA's initial post here.

    https://www.woodworkforums.com/f189/u...-lathe-132602/

    As RC later states, that lathe had a Jarno taper.

    BT
  5. 16th March 2012, 12:54 AM #4
    TomW
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    Thanks A B
    I will purchase a 3-5 morse sleeve and machine it down to (no 16 Jarno size) the dimensions which I think I've got on a chart somewhere Otherwise as pipeclay suggested I will measure with caliper and then hope that sleeve is soft enough to machine.
    tom.
  6. 23rd May 2012, 10:46 PM #5
    Pete012
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    I have a LAM BH-350 which has a 4.5 morse taper headstock taper. I have original manual to confirm. I had never heard of such a thing.. But apparently it exists. I was supplied with an adaptor M4.5 to M2, but to find additional adaptors is apparently difficult. These are not commercially available as far as I am aware. Maybe these would need to be machined by owner?? I understand that the '4.5' refers to the larger end of a #4 morse. I would be interested if anyone could enlighten me.
  7. 24th May 2012, 05:02 PM #6
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    MacPuddock
    MacPuddock is offline Cranky Old Phart
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    I made a 4.5 Morse taper many years ago.

    I bought a MT5 to MT3 adapter, put a MT3 dead centre in it and machined it between centres, Worked out OK.

    Morse taper table attached (I hope).

    Cheers,

    Findlay.
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