IAI EC-S7 - Chapter 10 Life; Concept of Life for Slider Type; How to Calculate Operation Life

10-1
10. Life
10.1 Concept of life for slider type
The mechanical life of the slider type, high rigidity slider type (EC-S□□AH) and high rigidity slider
type (EC-S□□H) is represented by that of the linear guide receiving the greatest moment load.
The operation life of the linear guide is to be determined by the total driving distance reachable
without flaking (peeling on rail surface) in 90% of a group of products operated under the same
conditions.
Operation life can be calculated with the method shown below.
How to calculate operation life
For the operation life of the linear guide, use the dynamic allowable moment stated in "1.2
Mechanical specifications", and calculate with the formula below.
L = × 5,000km
L: Operation life (km)
C
M
: Dynamic allowable moment (N･m)
M: Moment acting (N･m)
5,000km: Standard rated life of ELECYLINDER
In addition, calculate with the formula below if the life may be shortened due to vibration or
mounting status.
L = ・ ・ × 5000km
L: Operation life (km) fws: Standard load coefficient
C
M
: Dynamic allowable moment (N･m) fw: Load coefficient
M: Moment acting (N･m)
fα: Mounting coefficient
5,000km: Standard rated life of ELECYLINDER
C
M
M
3
C
M
M
3
f
w
f
ws
1
f
α
10.1 Concept of life for slider type