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Thread: What do you think about how the leads on this ballscrew look?

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    Default What do you think about how the leads on this ballscrew look?

    I have a machine with a ballscrew that sounds ok but has some lines that run perpendicular to the threads about every 1/4" marks in the leads of the screw. Not sure what to make of it. Is there some problems present or is it starting to fail?
    Attached Thumbnails Attached Thumbnails Y screw horizontal (vertical axis with brake) 2.jpg   Y screw horizontal (vertical axis with brake).jpg  

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    Default Re: What do you think about how the leads on this ballscrew look?

    Sammy,

    About the pictures, i think that has some ball inside the ball screw that´s no good. The backlash is Ok ??? This marks is not normal. If has any damage inside the ball screw, in the future, it´s possible that don´t has more job to do in the ball screw.

    Daniel

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    Default Re: What do you think about how the leads on this ballscrew look?

    Difficult to realy know without it directly infront of me etc .

    But given that the screw is working fine , the wear marks are typical of high usage and at some time lack of lubrication , coupled with over zealous feedrates .

    if you can replace and repak the grease in the ballscrew and visualy inspect the ballbearings , you may possibley find one or two ballbearings that are rough and be replaced then everything should be fine .

    hope this helps
    Dave

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    Default Re: What do you think about how the leads on this ballscrew look?

    This is a vertical axis, if the chains are for a counter balance, it looks like the photo is top, looking down, so the weight of the axis could be "peening" the balls into the screw, maybe find some way to reduce the load at start and stop of axis movement, if there is black residue on the screw, it points to low lube and or wrong type, also the hardness of the screw maybe less than you need, has the ballscrew been repaired, rethrust.

    Contact a reputable Ballscrew repair shop, with same photo's.

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