Ballscrew question - user stupidity...


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    Default Ballscrew question - user stupidity...

    So I was repairing my Z axis last night and removed my ball screw nut and to my surprise or I guess maybe not, all the bearings fell out... ugh!

    Similar to this unit:

    https://www.ebay.com/itm/Ballscrew-S...YAAOSwo3tauwol

    I was able to find, replace and reassemble the bearings in the nut but just curious if this causes people any heartache..?

    Adam,

    Similar Threads:
    G540, Rack and Pinion Drives-X/Y axis, 1/2-Ball Screw-Z Axis w/THK HSR 25 Linear Slides, Steppers KL23H2100-35-4B, Power Supply-KL-600-48


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    Default Re: Ballscrew question - user stupidity...

    Yep it`s kinda tricky to put it all together if it`s your first time , well first things first, wash everything with diesel or gasoline or any solvent you have available in your area, after thoroughly cleaning it, wipe everything with dry cloth or flush it with air blow gun if you are using diesel, after all parts are all dried and clean put multipurpose grease on the ball screw casing, in that way you can stick all the ball bearings inside piece by piece using a small magnetic screw driver, after all the ball bearings are stuck inside the ball screw casing gently screw back the threaded rod all the way until it reaches thru the other side, you may have to pry back some of the balls when it loosens in the path way of the thread, patience is the key on working ball screws, the first time I overhaul ball screws it took me thirty minutes to figure out how to put it back haha, but now that im familiar it`ll take only 2 minutes for me to put it back first time = hard, frequent = boring hehe

    Edit: sorry I forgot, you need to wash again the ball screw with diesel to liquify the grease you put on earlier, to be able to make the ball screw as smooth as possible when it rotates, on our units I use cooking oil for lubricating the ball screws after it`s been overhauled. I use thin oil on it to be able to flush the dust debris easily with air blow gun while cleaning it after an 8 hour work, the grease tends to hold the dust debris firmly and will get stuck again in no time because it`s hard to flush it because it`s too thick.



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    Default Re: Ballscrew question - user stupidity...

    OK, thanks for the insight.

    At least I can feel comfortable after reassembly that its not a total bonehead move and as long as its back together I should be good.

    Adam,

    G540, Rack and Pinion Drives-X/Y axis, 1/2-Ball Screw-Z Axis w/THK HSR 25 Linear Slides, Steppers KL23H2100-35-4B, Power Supply-KL-600-48


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    Default Re: Ballscrew question - user stupidity...

    At least I can feel comfortable after reassembly that its not a total bonehead move
    Oh, it is, but it happens to lots of people.

    Gerry

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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


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    Default Re: Ballscrew question - user stupidity...

    Did you count your balls...?

    You are lucky if you found them all.



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    Default Re: Ballscrew question - user stupidity...

    Quote Originally Posted by ger21 View Post
    Oh, it is, but it happens to lots of people.
    LOL!


    Quote Originally Posted by A_Camera View Post
    Did you count your balls...?

    You are lucky if you found them all.
    Luckily I was working over the CNC bed and most of them were still in the nut due to the grease but I did have to chase one off the floor..

    G540, Rack and Pinion Drives-X/Y axis, 1/2-Ball Screw-Z Axis w/THK HSR 25 Linear Slides, Steppers KL23H2100-35-4B, Power Supply-KL-600-48


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    Default Re: Ballscrew question - user stupidity...

    Yes this happens to a lot of people.

    If a large number of balls fell out it is probably a good idea to measure thier diameters. Some ball screws get packed with balls of two different sizes. They are alternated small - big - small - big with the smalls effectively acting as idlers. Just realize that not all ball screws are done this way.

    Alternating ball sizes are seen in hand titted low backlash ball screw assemblies.



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Ballscrew question - user stupidity...

Ballscrew question - user stupidity...