Strength Of The Ball Screw Spline - Epson LS-B Series Manual

1.2.1 Strength of the Ball Screw Spline

If a load exceeding the allowable value is applied to the ball screw spline, it may not work
properly due to deformation or breakage of the shaft.
If the ball screw spline is applied the load exceeding the allowable value, it is necessary to
replace the ball screw spline unit.
The allowable loads differ depending on distance where the load is applied to.
For calculating the allowable load, see the calculation formula below.
[Allowable bending moment]
[Moment]
Example:
LS-B series Rev.5
M=50,000 N·mm
M=F L 110 400 44,000 N
∙ ＝ ∙ ＝
If 110 N(11.2kgf) load is applied
at 400 mm from
the end of the spline nut
LS20-B Manipulator 1. Safety
mm
∙
End of the
spline nut
L
F
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