1. #1
    I am thinking about a vertical spindle for my centec 2

    after a quick search through the forum i found many great threads on small home made spindles (most of which featuring ER type tooling) but little to nothing to do with beefier designs

    my questions are...

    1) has anyone tried transposing the same techniques to machining a larger spindle featuring a NMTB or R8 taper?

    2) should i even bother with a home made spindle or should i hold out and just shoe-horn a bridgeport type head on to it (that certainly would be interesting)

    the machine would be primarily for cutting aluminium but it needs to be capable of machining steel

    any ideas or recommendations are very welcome



    cheers everyone.
    Jonny

  2. #2
    How can you mention beefier design and R8 in the same post ?

    I would have though that the Centec was a more limiting factor than say Er32
    John S -

  3. #3
    Quote Originally Posted by John S View Post
    How can you mention beefier design and R8 in the same post ?

    I would have though that the Centec was a more limiting factor than say Er32
    ok, maby R8 is not a perfect choice but it is an affordable option

    the reason i dont want an ER only spindle is that i would possibly like to add an atc somewhere on down the line (did i forget to mention the CNC bit?)

    the centec may seem limiting by is very design but i have figured out a few ways to 'correct this'


  4. #4
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 6 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,833. Received thanks 192 times, giving thanks to others 5 times.
    BT/CAT/INT/Whatever in 30 or 40 would be my choice.
    R8 is just a glorified collet system.

    30 is a nice size for smaller machines, however 40 stuff is more common.
    One of my pet hates with my Harrison mill is it's only an INT30, as finding suitable arbors can be a problem, and some of what I've got I had to import from over the pond as no UK supplier could supply them at a reasonable price.

  5. #5
    Quote Originally Posted by m_c View Post
    BT/CAT/INT/Whatever in 30 or 40 would be my choice.
    R8 is just a glorified collet system.

    30 is a nice size for smaller machines, however 40 stuff is more common.
    One of my pet hates with my Harrison mill is it's only an INT30, as finding suitable arbors can be a problem, and some of what I've got I had to import from over the pond as no UK supplier could supply them at a reasonable price.
    lets try to steer this away from becoming another 'R8 is inferior' thread, there are plenty of them about!

    I know a 40 taper spindle would be somewhat overkill but it could well be implemented and the abundance of tooling certainly backs its cause



    what if i was to machine the outer profile of the spindle (between centers) and use a TP grinder on the bearing surfaces, then machine the interior taper etc once in situ
    does this sound like a plan or a waste of time?

  6. #6
    Jonny just looking at your miller what with lathe,mill,drill press and new job you dont do things in half mate:-one cut

  7. #7
    Quote Originally Posted by onecut View Post
    Jonny just looking at your miller what with lathe,mill,drill press and new job you dont do things in half mate:-one cut
    I certainly don't make it easy on myself!, sometimes i think i should slow down and focus on one project but then i just go feuter with something else

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