1. #1
    Lee Roberts's Avatar
    Lives in Wigan, United Kingdom. Current Activity: Viewing Moderator Control Panel Has been a member for 9-10 years. Has a total post count of 2,544. Received thanks 161 times, giving thanks to others 652 times. Made a monetary donation to the upkeep of the community. Referred 10 members to the community.
    I don't need one just yet but I was wondering what people are/have used for tooling in the Chinese water cooled spindles to fly cut their machine bed flat and true?

    On my first "real - as in not made from mdf" machine I'm building, the cutting area is smaller than the bed size, so I'm thinking I need something with a bit of reach to get at the full bed please.

    Thanks

    .Me
    Last edited by Lee Roberts; 06-07-2016 at 07:56 PM.
    .Me

  2. #2
    Quote Originally Posted by Lee Roberts View Post
    I don't need one just yet but I was wondering what people are/have used for tooling in the Chinese water cooled spindles to fly cut their machine bed flat and true?

    On my first "real" machine I'm building, the cutting area is smaller than the bed size, so I'm thinking I need something with a bit of reach to get at the full bed please.

    Thanks

    .Me
    Lee something like this http://www.wealdentool.com/acatalog/..._Wing_250.html but you can get cheaper if you shop around.


    You don't need to surface the whole bed in fact you will end up with a nice reference edge to put parts against
    ..Clive
    The more you know, The better you know, How little you know

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  4. #3
    Lee Roberts's Avatar
    Lives in Wigan, United Kingdom. Current Activity: Viewing Moderator Control Panel Has been a member for 9-10 years. Has a total post count of 2,544. Received thanks 161 times, giving thanks to others 652 times. Made a monetary donation to the upkeep of the community. Referred 10 members to the community.
    Thanks mate,

    I was actually thinking more along the line of something proper like in this pic, with the right shank for the collets:



    Looking into it more it looks like allot of people just make up their own design/holder for the type of cutter they want to use:





    I guess it's something I can look at once it's up and running, a lathe by then maybe nice/handy too. If I decide to make my own that is, I'll keep looking :).

    .Me
    .Me

  5. #4
    Lee Roberts's Avatar
    Lives in Wigan, United Kingdom. Current Activity: Viewing Moderator Control Panel Has been a member for 9-10 years. Has a total post count of 2,544. Received thanks 161 times, giving thanks to others 652 times. Made a monetary donation to the upkeep of the community. Referred 10 members to the community.
    This one on ebay dosnt look to bad at 9 : http://www.ebay.co.uk/itm/152127908978

    A better buy: http://www.ebay.co.uk/itm/162124411254

    .Me
    Last edited by Lee Roberts; 06-07-2016 at 07:17 PM.
    .Me

  6. #5
    Hi Lee,

    For wood the wealdon tool would be fine. I've used 18mm 2 flute carbide tipped cutters with no issues on wood. I'm sure you could go higher.

    But I think for skimming aluminium the flycutter styles pictured above would be hard on the spindle bearings with the interrupted cut, and you would need to run at a high rpm (due to the limited torque) which would be way too fast for the surface speed. I've not tried this, just my thoughts on it.

    If you do make/buy a flycutter style tool I'd be tempted to keep the radius down. Larger radius also amplifies any out of tram on the spindle.

    My method is a 6mm 2 flute carbide and lots of patience. If you are going for the 2.2kW then you can go up to ~12mm.
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

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  8. #6
    Lee,

    The trouble with fly cutters is balance. An out of balance cutter at 10,000 rpm will shorten the life of the spindle bearings. Something like this http://www.ebay.co.uk/itm/6mmx30mm-C...8AAOSwbYZXVoPY will be better. It's called a bottom cleaner, but......

    Rob
    Albert Einstein may have been a genius, but his brother Frank, was a monster

    Sent from my clunky old Windows 7 Machine

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  10. #7
    Tried it on aly with a proper fly cutter and found it hard getting over 4Krpm and at that speed the spindle will stall very easily.

  11. #8
    Lee, I've got the expensive Wealden Tool trepanning tool (99 😱) and it's fantastic so the cheaper one will be just as good. As others have said you don't want to go with something that's unbalanced....
    Neil...

    Build log...here

  12. #9
    DONT try it those things are leathal if spun too fast and like been said there's no torque at low speeds with these spindles.

    Go with the Trepanning tool it will be fine.

  13. #10
    I know this is an old thread but I just came across it searching on google for something completely unrelated, so thought I'd share in case anyone else comes across it.

    I seem to have found the sweet spot for my machine with a 2.2kw spindle with a stub length, 10mm 3 flute carbide end mill. Small enough that it can be spun somewhere in the powerband, bigger than waiting for a smaller tool to get it all done and can feed at a half decent rate, leaving a lovely finish on the top of 6082. Can get away with taking DOC of about 2mm at 67% engagement. If you have a stiffer machine you'd get away with taking off more.

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