2700-4001_22 IMA Manual
49
Last Revision: 12/14/2021
Step 1:
Select the Basic Lubrication Interval (
t
BL
) based on the cycles RMS Velocity (
V
RMS
).
t
BL
= 4500 x (
V
RMS
)
-1.57
(hours)
Step 2:
Determine the Thrust Correction Factor (
K
T
) based on the ratio of the Actuator Peak Thrust Rating (
T
PEAK
)
to the Cycle Equivalent Load (
P
e
).
Step 3:
The Lubrication Interval (
t
L
) for a given cycle is then calculated as:
t
L
=
t
BL
x
K
T
(hours)
Re-lubricate with Tolomatic Grease #2744-9099 into the grease zerk located on the rod end.
QUANTITY
IMA33
2.5 + [0.010 x L (mm)]
g
IMA33
0.09 + [0.009 x L (in)]
oz
IMA44
4.8 + [0.010 x L (mm)]
g
IMA44
0.17 + [0.009 x L (in)]
oz
IMA55
6.6 + [0.019 x L (mm)]
g
IMA55
0.23 + [0.017 x L (in)]
oz
L=stroke length (mm or in)
ROLLER SCREW LUBRICATION (Example Calculation)
Cycle Details:
Product: IMA33 RN05
V
RMS
: 1.66 in/sec
T
PEAK
: 1700 lbf
P
e
: 400 lbf
Step 1:
Select the Basic Lubrication Interval (
t
BL
) based on the cycles RMS Velocity (
V
RMS
).
t
BL
= 4500 x (1.66 in/sec)
-1.57
= 2019
(hours)
Step 2:
Determine the Thrust Correction Factor (
K
T
) based on the ratio of the Actuator Peak Thrust Rating (
T
PEAK
)
to the Cycle Equivalent Load (
P
e
).
Step 3:
The Lubrication Interval (
t
L
) for a given cycle is then calculated as:
t
L
= 2019
(hours)
x 0.87 = 1757
(hours)
Tolomatic recommends validating the output force after 100 000 cycles and on an annual basis thereafter.
