2700-4001_22 IMA Manual
47
Last Revision: 12/14/2021
7:
IMA
R
EPAIR AND
M
AINTENANCE
Before starting any maintenance activities, make sure that the supply power is shut OFF.
7.1 Lubrication
NEW UNIT: All Tolomatic IMA Actuators have been lubricated at the factory and are ready for installation. If the
actuator is placed in storage for more than 1 year after it is received, the actuator should be lubricated through the
lubrication port on the thrust rod with Mobilith SHC220 #2744-1016 (QUANTITY: IMA33: 3.0 g; IMA44: 5.0 g;
IMA55: 7.0 g and cycled at least two full strokes prior to running in a loaded condition.
Lubrication needs in a given application are dependent on multiple factors:
•
Ambient temperature of environment
•
Application schedule:
- Number of extend/retract (long moves) per minute
- Number of extend/retract (short moves) per minute
- Actuator thrust rod force required
Do not over-fill with grease
Overfilling will cause a reduction in performance, excessive heat build up and potential premature failure.
7.2 Periodic Maintenance
PERIODIC MAINTENANCE: In typical applications, it is recommended to re-lubricate the Tolomatic IMA Actuators
using the following calculations.
BALL SCREW
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
l
= Lubrication Interval
(hours)
Step 1
: Calculate actuator Power Output
Step 2
: Select the appropriate actuator power level
P
C
Step 3
: Calculate the Power Factor
Step 4:
The lubrication interval
(
t
l
)
for a given cycle is then calculated as:
t
l
= 1,000
(hours)
=
K
p
< 1
t
l
= 9,000
(hours)
=
K
p
< 1
