Z stepper motor question

Discussion in 'BigBox General Chat' started by R Design, Jun 24, 2016.

  1. R Design

    R Design Well-Known Member

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    The Z axis motors have their load weighing down directly into the shaft.

    Am I right in thinking that's an excellent - but unconventional - arrangement?

    Doubtless it's not a problem for us but, out of interest, how much load can a stepper take like that? I tried looking at various specs but couldn't find anything.....
     
  2. tohara

    tohara Well-Known Member

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    You would have to look at the bearing specs. I think the steppers used in the BB have 625Z bearings. They have a static radial load rating of approx. 380N. And axial load rating is approx. 20-25% of radial rating. So 2x380x0.2 = 152N

    Ref: http://www.smbbearings.com/technical/bearing-load-rating.html
     
    #2 tohara, Jun 25, 2016
    Last edited: Jun 25, 2016
  3. R Design

    R Design Well-Known Member

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    Excellent.

    Thanks for taking me through the calculation.
     

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