Tolomatic User Guide:
IMA-S Integrated Motor Rod-Style Actuator - Stainless Steel
• 33 •
7:
R E P A I R A N D M A I N T E N A N C E
7 .3 Lubrication
NOTE
Before starting any maintenance activities, make sure that the supply power is shut OFF.
CAUTION: DO NOT FILL WITH GREASE!
IMA-S actuators have been lubricated at the factory and are ready for installation. Please use the
appropriate lubrication interval calculations listed below for schedule estimates.
Overfilling will cause a reduction in performance, excessive heat build up and potential premature
failure.
All curves represent properly lubricated and maintained actuators.
BALL SCREW
Step 1:
Calculate actuator Power Output
P
IMA
=
V
RMS
x
T
RMS
x 0.113
(watts)
Step 2:
Select the appropriate actuator power level
P
C
Step 3:
Calculate the Power Factor
K
P
=
P
C
P
IMA
Step 4:
The lubrication interval (
t
l
) for a given cycle is then calculated as:
t
l
= 1000
(hours) =
K
P
< 1
t
l
= 9000
(hours) =
K
P
> 1
• Re-lubricate with Mobilith SHC220 #2744-1016
(
QUANTITY:
IMA-S 33: 3.0 g; IMA-S 44: 5.0 g) into the grease zerk located
on the rod end.
• IMA-S 22 ballscrew does not require relubrication.
Where:
P
IMA
= IMA Power Output
V
RMS
= RMS Velocity
(in/sec)
T
RMS
= RMS Thrust
(lbf)
K
P
= Power Factor
P
C
= Power Level
t
I
= Lubrication Interval
(hours)
