JVL MAC050 User Manual page 381

6.5
6.5.3 Life time of ball bearing in MAC800
The curve below can be used to determine the relation between the radial load at the
motor output shaft and where the load is placed at the shaft with reference to the flange
of the motor.
The curves are based on a continuous speed of 3000 RPM.
If the speed is lowered the lifetime will increase inversely proportional.
Example:
A motor is having a radial load of 200N placed with center 20 mm from the flange.
According to the curve the lifetime will be 68000 hours at 3000 RPM.
If the speed is lowered to 300 RPM (10 times lower than the curve is specified at) the
lifetime will increase 10 times giving a total of 680000 hours of operation.
Life time(hrs)
1000000
100000
10000
1000
JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500
Life time
Expected ball bearing life time V.S. distance
10 15 20 25
Distance (mm)
Only MAC800
100N
200N
300N
400N
500N
30 35
TT1059GB
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