2700-4001_22 IMA Manual
22
Last Revision: 12/14/2021
4.6 Mounting
Thrust Rod Attachment
The design of the Tolomatic IMA Actuator allows the extending rod to rotate. This provides simple setup of the
actuator by allowing the user to rotate the rod and thread it in and out of the actuator for mechanical attachment or
system testing. This feature also requires that the rod be kept from rotating when used in its dedicated application
to insure proper linear motion. In most applications, such as those where the load is coupled to an external
mechanical guide, or some other support device, the load cannot rotate, and thus provides anti-rotation for the
extending rod of the actuator.
Figure 4.5: Hold thrust rod stationary using a wrench on the flats of the rod end when attaching accessories,
linkages or load to the actuator. Two wrenches are used here: The crescent wrench prevents the thrust rod from
rotating, the torque wrench will fasten the spherical rod eye option to the actuator rod end. Torque values provided
in Table 4.1
Take precautions to cause no damage to the actuator’s grease zerk throughout the following process.
APPLYING TORQUE TO THE THRUST ROD MAY DAMAGE THE ACTUATOR. Avoid this by using a wrench to
prevent the thrust rod from rotating while attaching the load, linkages or accessories to the rod end. When
attaching the load, linkages or accessories to the rod end, it is recommended to have the thrust rod fully retracted.
Thrust Rod Connection:
ROD END ATTACHMENT FOR ROUND ROD ACTUATOR: Hold flats on round rod stationary using a fixture, vise,
or opposing wrench. Torque weld gun connection linkage or rod eye up to table value shown:
ROD END ATTACHMENT FOR ACTUATOR WITH ARO OPTION: Hold flats on the thrust rod stationary using a
fixture, vise, or opposing wrench. Do not rely on the anti-rotate feature to oppose the installation torque.
Torque rod end linkage or rod eye up to table value shown:
Internal Threads
M8
11 N-m
M12
70 N-m
M20
180 N-m
M27
500 N-m
8 ft-lb
52 ft-lb
133 ft-lb
369 ft-lb
External Threads (MET)
M10
14 N-m
M16
90 N-m
M20
180 N-m
M27
500 N-m
10 ft-lb
67 ft-lb
133 ft-lb
369 ft-lb
Table 4.1: Rod end torque recommendations
