Combined bending and compressive load

This must be checked where there are applications in which ball screws are subject to compressive stress. The value resulting from the equation below (Eulero’s formula) must be compared to the value C_o. Value F_p  must be lower than C_o.

F_p

 combined bending and compressive load (N)

d_n

screw nut diameter (mm)

l₁

unsupported length (mm)

f_m

coefficient relative to type of support