Allen-Bradley MPAI-A C Series Installation Instructions Manual page 47

Lubrication Calculation Example
The following is an example of lubrication interval calculation for MPAI-x3xxxRMxx electric
cylinder.
Operators
Variable Description
F Actuator peak force
xpeak
F Application maximum command force
xn
K Load correction factor
S Screw static load factor
co
t Basic lubrication interval
bl
V RMS velocity
rms
Screw Static Load Factors
Cat. No.
MPAI-x3xxxRM3xx
MPAI-x3xxxSM3xx
MPAI-x4xxxRM3xx
MPAI-x4xxxSM3xx
EXAMPLE Product
V
F
F
t
K
t
S
co
0.24
0.44
0.26
0.40
MPAI-x3xxxRM3xx
1.66 in/s
rms
1700 lbf
xpeak
400 lbf
xn
= 4500 x (1.66 in/s)-1.57
bl
= 0.24 (1700 lbf/400 lbf)
MPAI-x3xxxRM3xx
= 2030 x (0.87)
l
Rockwell Automation Publication MPAI-IN001F-EN-P - January 2016
MP-Series Heavy-duty Electric Cylinders
= 2030 hr
-0.15
= 0.87
= 1766 hr
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