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.
calculating the allowable load, see the calculation formula below.
[Allowable bending moment]
[Moment]
Example:
LS-B series Rev.5
LS3-B:M=13,000 N·mm
LS6-B:M=27,000 N·mm
M=F·L 100·100 10,000 N·mm
＝ ＝
If 100 N (10.2kgf) load is applied
at 100 mm from
the end of the spline nut
LS3-B LS6-B Manipulator 1. Safety
End of the
L
spline nut
F
For
5