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IndustryArena Forum > Mechanical Engineering > Linear and Rotary Motion > Suitable tolerance between parallel linear shafting ?

Thread: Suitable tolerance between parallel linear shafting ?

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  1. 09-06-2015, 11:00 PM #1
    MrChips
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    Suitable tolerance between parallel linear shafting ?

    Anyone know what the suitable linear tolerance between 25mm parallel shafts would be for use with adjustable quality linear ball bushings ?

    Cheers
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  2. 09-06-2015, 11:13 PM #2
    ger21
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    Re: Suitable tolerance between parallel linear shafting ?

    If it's not very near zero, you'll experience binding as it travels from one end to the other.
    Gerry

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  3. 09-09-2015, 11:07 PM #3
    MrChips
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    Re: Suitable tolerance between parallel linear shafting ?

    Quote Originally Posted by ger21 View Post
    If it's not very near zero, you'll experience binding as it travels from one end to the other.
    Thanks Ger21. Do you think 0.05mm be ok ?
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  4. 09-10-2015, 10:41 AM #4
    RCaffin
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    Re: Suitable tolerance between parallel linear shafting ?

    Do you think 0.05mm be ok ?
    Can you get 50 microns free play in a good ball race?
    Didn't think so.

    I would be looking for not over 5 microns, myself. But one normally gets that or better by sliding the carriage back and forth as the bolts are tightened.

    Cheers
    Roger
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  5. 09-10-2015, 11:44 AM #5
    hanermo
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    Re: Suitable tolerance between parallel linear shafting ?

    Rcaffin has it right.
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  6. 09-11-2015, 04:59 PM #6
    louieatienza
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    Re: Suitable tolerance between parallel linear shafting ?

    Check the spec sheet from the manufacturer. Depending on grade, they have a parallel as well as on-plane tolerance which I'd a bit higher than one may think. Obviously you want them as perfect as possible but that is not always possible
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