Allen-Bradley MPAI-A C Series Installation Instructions Manual page 45

Roller Screw Lubrication
The lubrication interval (t
the lubrication interval include the following:
•
Frame Size - 83 or 110 mm (3.27 or 4.33 in.)
•
Screw Lead - 5.0 or 10 mm/rev (0.197 or 0.394 in./rev)
•
Basic lubrication interval (t
•
Load correction factor (K) based on the actuator peak force (F
maximum commanded force (F
Use only the lubricant the factory recommends for your roller screw application.
Lubrication Interval Calculation
Use these steps to calculate the lubrication interval (t
cylinder.
1. Select the basic lubrication interval (t
The basic lubrication interval (t
100,000
10,000
1000
100
0
2. Determine the load correction factor (K) based on the ratio of actuator peak force
(F ) to the application maximum commanded force (F
Xpeak
IMPORTANT
Frame Size 83, 5 mm Roller Screw Load Correction
) of a roller screw actuator must be calculated. Factors that influence
l
) based on RMS velocity (V
bl
Xn
t = 4500 x (V
bl
bl
Basic Lubrication Interval (t
1 2
Load Correction (K) must not be greater than one (<1).
K
MPAI-x3xxxSM3xx
Rockwell Automation Publication MPAI-IN001F-EN-P - January 2016
)
) in hours for your roller screw electric
l
) based on the RMS velocity (V
bl
-1.57
) , hr
rms
) falls within the range of this graph.
3 4 5
Cycle RMS Velocity (in/s)
= 0.24 (F
Xpeak
MP-Series Heavy-duty Electric Cylinders
)
rms
) and application
Xpeak
).
rms
)
bl
6 7 8
).
Xn
/F )-0.15
Xn
9
45