Tritex 1 Installation and Setup
116
09/27/12
PN: 27666
Exlar Corporation
Rev. M
952-500-6200M
2.) Use a brush to work grease in to the roller screw assembly. Be sure to cover all the
threaded surfaces of the screw assembly. This can be accomplished by applying grease
to a few places on the roller screw assembly and rotating the components repeatedly in
both directions to work the grease into the assembly.
3.) Force grease into the front of the thrust bearing assembly. Make a concerted effort
to insure that the grease is well worked in. Grease must reach the bearing just behind
the bearing that is visible as well. Use the following amounts of grease for each size
roller screw and bearing:
TLM20:
0.5 in
3
TLM30:
0.75 in
3
Reassembly
1.) Rethread the roller screw into the internally threaded cylinder (ITC). It is a multiple
start screw, and this is not always easy. DO NOT FORCE THE ROLLER SCREW INTO
THE CYLINDER. It is best to have the actuator vertical with the open end of the roller
screw cylinder facing up. Position the roller screw above the cylinder so that it is aligned
axially with the ITC. Slowly turn the roller screw 1/4 to 1/2 a turn counterclockwise with it
in contact with the ITC. This will help to align the threads on the roller screw with the
threads in the ITC. Rotate the roller screw clockwise and it should begin to thread into
the cylinder. If it does not turn freely, remove it and begin again. When threading the
screw into the cylinder, it will roll freely into the actuator. When it reaches the portion of
the cylinder that contains the motor magnets, the roller screw will be more difficult to turn
because of the magnetic field of the magnets. THIS IS NORMAL. Continue to thread the
roller screw into the cylinder. When it reaches the bottom, it will become difficult to turn
and the motor and bearings will begin to rotate with it. The roller screw is now fully
inserted into the cylinder.
2.) Place a small amount of seal lubricant on the inside surface of the seal/bushing
assembly.
3.) Carefully slide the face plate and bushing/seal assembly over the actuator rod end,
while guiding the tie rods through the holes in the rear end cap of the actuator. The seal
is a tight fit on the rod end. Take care not to damage the seal on the threads of the
extending rod. Standard TLM Series rods have a chamfer to provide a lead in for
replacement of the seal and bushing. Be sure that the faceplate seats completely and
squarely on the front of the actuator. The inner surface of the faceplate provides the
pre-loading for the bearings, and it is important that it is properly seated.
Units With a Front Flange
Replace the faceplate as described above. Remount front flange by sliding tie rods
through the holes in the faceplate and through the holes in the rear end cap. Pilot the
flange on the pilot diameter located on the front of the faceplate.
4.) Replace the rear tie rod washers and nuts and tighten to the proper torque. Tighten
the nuts simultaneously by partially tightening each in an opposing corner pattern until
each is torqued to the rated value as follows.
TLM20:
20 lbf-in (1.7 lbf-ft, 2.26 N-m)
TLM30:
90 lbf-in (7.5 lbf-ft, 10.16 N-m)
