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IndustryArena Forum > MetalWorking Machines > Fadal > Need Fadal Ballscrew information pls
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  1. #1
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    Jul 2010
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    57

    Need Fadal Ballscrew information pls

    Hello.
    I would like to replace the ballscrews on a Fadal 3016 metric DC machine.
    I dont want/need specialised ball screws
    to run chiller fluid though so would like to get some solid ballscrews rather than the specific parts and part numbers from the maintenance manual.
    Hopefully someone can provide the specs on the xyz ballscrews of a fadal 3016 metric along the lines of diameter, pitch and particularly grade (C ??), fadal ball nut bolt pattern end dimensions etc.
    This info would be great to be able to source the equivalent in solid ball screws and move away from the standard chiller through ball screws which I dont really use.
    Many thanks for the info!
    Cheers,
    Marty.

  2. #2
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    Dec 2014
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    129

    Re: Need Fadal Ballscrew information pls

    You can just unhook them and either block the lines or make it loop to reroute the dowfrost away. that's what I did on my machine, no leaks and no problems, I agree with getting away with the chilled ballscrews, it just washes the grease away from the thrust bearings if the oil seals go bad. Just a thought if you can't find a source for them. My machine is a 4020 and I haven't had any problems since I unhooked them about 2 years ago, and I've done some pretty heavy stuff.

  3. #3
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    Re: Need Fadal Ballscrew information pls

    Quote Originally Posted by jbranting View Post
    You can just unhook them and either block the lines or make it loop to reroute the dowfrost away. that's what I did on my machine, no leaks and no problems, I agree with getting away with the chilled ballscrews, it just washes the grease away from the thrust bearings if the oil seals go bad. Just a thought if you can't find a source for them. My machine is a 4020 and I haven't had any problems since I unhooked them about 2 years ago, and I've done some pretty heavy stuff.
    I think he just needs new ball screws in general and is wondering to get some without the lines in them since he probably has disconnected it like you did.

    He may be trying to save money vs the ones with the holes in them.

  4. #4
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    Thanks very much for the replies.
    Yes, quite right, I disconnected the chiller lines many years ago and havent looked back.
    So I am looking for the specs so that I can source some solid ones hopefully at a more economical level given I dont want or need the complexity of a hole through the entire ball screw.
    I could take mine out and measure them up but would prefer to keep the machine operational. Neither the fadal maint manual or the parts suppliers have any detailed info on the matter.
    Thanks again.

  5. #5
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    Re: Need Fadal Ballscrew information pls

    Quote Originally Posted by Trebol View Post
    Thanks very much for the replies.
    Yes, quite right, I disconnected the chiller lines many years ago and havent looked back.
    So I am looking for the specs so that I can source some solid ones hopefully at a more economical level given I dont want or need the complexity of a hole through the entire ball screw.
    I could take mine out and measure them up but would prefer to keep the machine operational. Neither the fadal maint manual or the parts suppliers have any detailed info on the matter.
    Thanks again.
    I don’t know if the metric machines came without cool power but check and see if the VMC15XT metric screws fit and if they have a non cooled version of those.

  6. #6
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    Re: Need Fadal Ballscrew information pls

    Hi. I have revisited this post as I am still searching for the information listed in the OP.

    Again wondering if anyone can tell me the bolt hole pattern of the nuts and the measurements/thread of the machined ends of the ballscrew for this machine. Want to buy some generic non-chiller through ball screws and machine the ends to suit before pulling the old ones off.

    So if anyone has the dimensions and threads of the ballscrew ends and their class (C7??) I'm still quite interested.

    Thanks.

  7. #7
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    Quote Originally Posted by Trebol View Post
    Hi. I have revisited this post as I am still searching for the information listed in the OP.

    Again wondering if anyone can tell me the bolt hole pattern of the nuts and the measurements/thread of the machined ends of the ballscrew for this machine. Want to buy some generic non-chiller through ball screws and machine the ends to suit before pulling the old ones off.

    So if anyone has the dimensions and threads of the ballscrew ends and their class (C7??) I'm still quite interested.

    Thanks.
    The original ones in my 4020 are nsk.
    C5 original grade.
    The nuts are ex production from nsk
    They will supply but made to order
    The nut dimension is not standard so couldn't find other manufactures that have the same nut sizing.
    As the screws are ground you won't be able to buy lengths of screw and cut it and machine yourself.
    You will have to get the manufacture to machine the ends to your spec and they will arrive assembled and preloaded to suit.
    Also you have to nominate the accuracy you want.
    C1,c3,c5 etc you can't use rolled screws must be ground.
    In short. Not worth it. Buy from the fadal parts suppliers. They will have the coolant holes but just loop the lines prior to the screws.
    I have 22 years in the bearing industry and with all my contacts it just wasn't worth the stuffing around and wait time to save only a couple of hundred bucks.

  8. #8
    I digress if you want to spend the time and get them drawn up you can buy chinese screws to fit. The reality is if someone picked a fadal up cheap you could essentially gut it and do absolutely anything you wanted with it. That’s presuming you have the time. If you’re making money than buy fadal and be done with it. We had an older bedmill you couldn’t even buy the screws anymore but you could send out to be re ground. Cost to regrind was $1,000 and the cost to buy an Asian ground screw specd to fit was $470 including the shipping. Granted it took two months but to fix it cheap so we had a back up machine we didn’t want to invest into made it outweigh scrapping it. The reality is do what you want but you probably won’t find too many fadal owners who rebuilt using Chinese components. That said there are a few retrofit projects out there though I’ve never heard if they were ever completed. $1,000 for a new ball screw complete assembly that bolts eight in isn’t a bad price.



    Quote Originally Posted by Deano7/11 View Post
    The original ones in my 4020 are nsk.
    C5 original grade.
    The nuts are ex production from nsk
    They will supply but made to order
    The nut dimension is not standard so couldn't find other manufactures that have the same nut sizing.
    As the screws are ground you won't be able to buy lengths of screw and cut it and machine yourself.
    You will have to get the manufacture to machine the ends to your spec and they will arrive assembled and preloaded to suit.
    Also you have to nominate the accuracy you want.
    C1,c3,c5 etc you can't use rolled screws must be ground.
    In short. Not worth it. Buy from the fadal parts suppliers. They will have the coolant holes but just loop the lines prior to the screws.
    I have 22 years in the bearing industry and with all my contacts it just wasn't worth the stuffing around and wait time to save only a couple of hundred bucks.

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