Curtiss-Wright EXLAR GTX Series Installation and maintenance instructions

This document does not contain any export-controlled technical data.
Information furnished by Exlar Corporation is believed to be accurate and reliable. However, no responsibility is assumed by Exlar Corporation for
its use. Exlar reserves the right to change the design and operation of the equipment described herein and any associated motion products that
may appear in this document. Information in this document pertaining to equipment not furnished by Exlar should be conrmed by that equipment
manufacturer. Exlar assumes no responsibility for changes to information by other manufacturers or errors in that information or the description of that
information. Information in this document is subject to change without notice.
Integrated Motor Actuator
Installation & Service Instructions
Rev. J | PN75557 | 12/19/23
GTX SERIES actuators

2| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
CONTENTS
1.0 INTRODUCTION .................................................................................................................3
1.1 GENERAL PRODUCT DESCRIPTION .....................................................................................................3
1.2 PRODUCT FEATURES ..............................................................................................................................3
1.3 SAFETY CONSIDERATIONS ....................................................................................................................4
2.0 SYSTEM CONFIGURATION ..............................................................................................5
2.1 GTX SERIES ACTUATOR..........................................................................................................................5
2.2 OPTIONS.....................................................................................................................................................5
2.2.1 Servomotor Ampliers........................................................................................................................5
2.2.2 Feedback Devices .............................................................................................................................5
2.2.3 Resolvers...........................................................................................................................................5
2.2.4 Encoders............................................................................................................................................5
2.2.5 Internal Holding Brake .......................................................................................................................5
2.2.6 Anti-Rotation Assembly......................................................................................................................5
2.2.7 Splined Rod Options..........................................................................................................................6
2.2.8 External Limit Switch .........................................................................................................................6
2.2.9 Stainless Steel Rod Options ..............................................................................................................6
3.0 MECHANICAL INSTALLATION ..........................................................................................6
3.1 MOUNTING CONFIGURATIONS ..............................................................................................................6
3.2 MOUNTING CONSIDERATIONS ..............................................................................................................8
3.2.1 Actuator Alignment.............................................................................................................................8
3.2.2 Feedback Device Alignment ..............................................................................................................8
3.2.3 Anti-Rotation Assembly......................................................................................................................9
3.2.4 External Limit Switch .......................................................................................................................10
3.3 LUBRICATION .......................................................................................................................................... 11
4.0 ELECTRICAL INSTALLATION..........................................................................................11
4.1 SAFETY CONSIDERATIONS .................................................................................................................. 11
4.2 CABLE ROUTING..................................................................................................................................... 11
4.3 AMPLIFIER PINOUTS AND CONNECTIONS ........................................................................................12
4.4 CONNECTING OPTIONAL EQUIPMENT...............................................................................................12
4.4.1 Feedback Devices – Encoders ........................................................................................................12
4.4.2 Internal Holding Brake .....................................................................................................................12
4.4.3 External Limit Switch ......................................................................................................................12
5.0 STARTUP ...........................................................................................................................13
5.1 CONSIDERATIONS FOR STARTUP.......................................................................................................13
5.1.1 Safety Considerations......................................................................................................................13
5.1.2 Amplier Software............................................................................................................................13
5.1.3 Rotary-To-Linear Motion Relationship .............................................................................................13
5.1.4 Amplier Wiring................................................................................................................................13
5.2 GENERAL STARTUP PROCEDURE ......................................................................................................13
6.0 MAINTENANCE PROCEDURES .....................................................................................15
6.1 LUBRICATION ..........................................................................................................................................15
Grease Renewal Procedure ....................................................................................................................15
6.2 SEAL MAINTENANCE..............................................................................................................................15
6.3 REPLACEMENT FACEPLATE ASSEMBLY KIT.....................................................................................16
7.0 TROUBLESHOOTING ......................................................................................................16
8.0 PRODUCT RETURNS.......................................................................................................17
9.0 CERTIFICATIONS .............................................................................................................17
9.1 IMPORTER REQUIREMENTS ................................................................................................................18
9.2 DISTRIBUTOR REQUIREMENTS ..........................................................................................................19
10.0 WARRANTY INFORMATION..........................................................................................20

GTX Installation & Maintenance Instructions | 3www.exlar.com | 952.500.6200
1.0 INTRODUCTION
1.1 GENERAL PRODUCT DESCRIPTION
GTX Series actuators feature a robust planetary roller screw mechanism integrated into the rotor of a brushless servomotor.
This unique design combines the high speed and high load capacity of the roller screw with the high torque-to-volume ratio of
the brushless servomotor.
Completing the actuator design is the choice of feedback devices. The most common types of feedback devices are resolvers,
incremental encoders, and absolute encoders. Selecting the proper feedback conguration allows GTX Series actuators to be
powered by brushless motor ampliers readily available from most leading motor manufacturers.
GTX Series actuators o󰀨er a true all-electric replacement solution for cumbersome, high-maintenance hydraulic systems.
Electronic servo control also provides simpler setup and more precise control than hydraulic systems. This exibility makes
GTX Series actuators an excellent motion control solution for today’s highest performance single- and multi-axis applications.
From food and beverage packaging to multi-axis turning centers to aircraft assembly, GTX Series actuators deliver outstanding
performance and durability.
GTX Series actuators feature an Ingress Protection Rating of IP66S.
1.2 PRODUCT FEATURES
T-LAM brushless servo motor
Inverted roller screw
High-pressure seal,
high-load bushing,
and rod scraper
integrated within
an easily replaceable
faceplate
Induction-hardened
chrome plated output rod
for maximum wear resistance
Industry standard rotatable
M23 connectors with pinouts
to match amplifier manufacturer's
standard cables
Feedback device
and alignment to
match amplifier
manufacturer
specifications
Inverted roller screw
Figure 1 – GTX Series Actuator features

4| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
1.3 SAFETY CONSIDERATIONS
Safety is of paramount importance during the installation and operation of your GTX Series actuator. Throughout this manual,
content agged with the cautionary symbols shown below should be read carefully by installers and operators to help avoid
property damage, personal injury or death.
DANGER! Indicates an extremely hazardous situation which will result in serious injury or death if precautions are
not followed. Extreme care should be taken in these situations.
WARNING! Indicates a potentially hazardous situation which could result in serious injury or death if precautions are
not followed. Extra care should be taken in these situations.
CAUTION! Indicates a potentially hazardous situation which could result in property damage or minor to moderate
injury.
IMPORTANT! Identies statements that provide important information to help ensure safe and trouble-free installation
and operation.

GTX Installation & Maintenance Instructions | 5www.exlar.com | 952.500.6200
2.0 SYSTEM CONFIGURATION
2.1 GTX SERIES ACTUATOR
GTX Series actuators provide a robust solution for long-life, continuous-duty applications even when environmental
contaminants are an issue. In most rotary-to-linear devices, critical mechanisms are exposed to the environment and must be
frequently inspected, cleaned and lubricated. In contrast, GTX Series actuators are designed with all converting components
mounted within sealed motor housings. With a simple bushing and seal on the smooth extending rod, abrasive particles or
other contaminants are prevented from reaching the actuator’s critical mechanisms. As a result, actuator life can exceed that
of a ball screw actuator by 15 times, even in high-speed, high-force applications.
2.2 OPTIONS
2.2.1 Servomotor Ampliers
GTX Series actuators function in the same manner as a brushless servomotor. A brushless servo motor amplier is used to
rotate the motor for a controlled number of revolutions and move times at controlled speed and torque. This rotary motion is
translated into linear motion by the GTX Series actuator’s internal planetary roller screw mechanism.
2.2.2 Feedback Devices
Feedback device selection is dictated by the amplier used to operate the actuator. Each amplier has specic requirements
for motor feedback. Standard GTX Series actuators use either a 2-pole resolver or quadrature incremental encoder as their
primary feedback device.
2.2.3 Resolvers
A resolver is a non-electronic device that functions similarly to a small transformer. When rotated, the resolver generates two
sine waves that are out of phase with one another. By decoding these two sine waves, the amplier can monitor the motor
direction, revolutions traveled, and speed of rotation. Each sine wave typically represents one revolution of the motor. The
amplier uses these signals to identify where the motor is within that revolution and properly time the supply of current and
voltage to the motor for it to rotate. This process is known as “commutation”. For the amplier to properly commutate the
motor, it must have a reference (or “zero”) point from which to track the motor’s rotation.
IMPORTANT! The zero point is critical and is provided to the amplier through the proper alignment of the resolver to the
phases of the motor during the actuator assembly. NOTE: Not all resolver-based ampliers can use the same resolver, resolver
alignment, or relative direction of resolver rotation.
2.2.4 Encoders
An incremental encoder is an electronic rotary device that transmits a string of electrical pulses when rotated to measure
position. A quadrature encoder (or “incremental rotary encoder”) measures the speed and direction of a rotating shaft. Most
brushless motor or servo systems with incremental encoders use a quadrature encoder. NOTE: Not all encoder-based
ampliers can use the same encoder, encoder alignment or relative direction of encoder rotation.
2.2.5 Internal Holding Brake
Many applications require the addition of a holding brake. The Exlar internal holding brake is engaged by a permanent-
magnet. The mechanical advantage of the roller screw allows the holding brake to prevent the output rod from back-driving the
load. The holding capacity of the brake is su󰀩cient to hold the rated force of the actuator.
2.2.6 Anti-Rotation Assembly
The unique design of GTX Series actuators helps simplify actuator setup by allowing the user to rotate the extending rod
and thread it in and out of the actuator for mechanical attachment or system testing. In most applications, the load is coupled
to linear bearings or some other support device, preventing rotation during operation. To ensure proper linear motion in
applications in which the rod is free to rotate, an Anti-Rotate Assembly is required to prevent the rod from rotating.

6| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
2.2.7 Splined Rod Option
The splined rod is an internal anti-rotate option that will restrict rotation but still provide linear motion without the need for an
external mechanism. It is not suitable for environments where contaminants may be able to penetrate the actuator. The option
does NOT meet the IP66S rating as there is no sealing component where the driven rod extends and retracts. If the unit is
installed vertically rod end down there is potential for grease to exit the unit in environments where overheating can occur.
2.2.8 External Limit Switch
A GTX Series actuator equipped with the anti-rotate and limit switch options can accommodate multiple limit switches for use
as end-of-travel limit switches or home position sensors positioned outside the low-prole extruded channel housing.
2.2.9 Stainless Steel Rod Options
All thread options on the GTX product line are available in 17-4 stainless steel. This option provides improved corrosion
resistance for the main rod of the actuator. This option can be benecial in applications where the rod could be exposed to
harsh chemicals or outdoor environments.
3.0 MECHANICAL INSTALLATION
3.1 MOUNTING CONFIGURATIONS
1
2
3
4
5
6
78
1 - Front Flange Kit*
2-Face Mount Kit
3 - External Limit Switch Kit**
4-External Anti-Rotate Kit
5 - Multiple Rod End Threads***
6 - Internal Anti-Rotate (Splined Rod)***
7-Rear Brake Option
8-Rear Clevis Kit*
* Metric/Imperial Options
** Limit Switches Sold Separately
*** Male/Female and Metric/Imperial Options
Figure 2 – Mounting congurations
GTX Series actuators mounting congurations:
• Rear clevis
• Front ange
• Tapped face
• Side mount.

GTX Installation & Maintenance Instructions | 7www.exlar.com | 952.500.6200
Figure 3 – Rear clevis mount (NOTE: Dimension drawings can be found in the
GTX Series Actuator catalog or on the Exlar website.)
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
Torque 4.6 Nm (3.4 ft-lbs)
Torque 12.2 Nm (9 ft-lbs)
Torque 23 Nm (17 ft-lbs)
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
18 mm Long
25 mm Long
30 mm Long
30 mm Long
40 mm Long
50 mm Long
GTX060: Torque 4.6 Nm (3.4 ft-lbs)
GTX080: Torque 12.2 Nm (9 ft-lbs)
GTX100: Torque 23 Nm (17 ft-lbs)
Figure 4 – Flange mount

8| GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
Figure 5 – Tapped face mount
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
GTX060: 5 mm Hex
GTX080: 6 mm Hex
GTX100: 8 mm Hex
18 mm Long
25 mm Long
30 mm Long
30 mm Long
40 mm Long
50 mm Long
GTX060: Torque 4.6 Nm (3.4 ft-lbs)
GTX080: Torque 12.2 Nm (9 ft-lbs)
GTX100: Torque 23 Nm (17 ft-lbs)
3.2 MOUNTING CONSIDERATIONS
3.2.1 Actuator Alignment
IMPORTANT! Aligning the GTX Series actuator with respect to the load it is moving is critical. Any misalignment will decrease
the life of the actuator’s components and may adversely a󰀨ect application performance.
CAUTION! Excessive side load on the actuator output rod will dramatically reduce the life of the actuator and should
be avoided. Side load can result from misalignment or loading that is not in line with the actuator output rod.
Side-mounting notes:
GTX Series actuators include threaded holes in the faceplate and endplate. Exlar recommends using hardened fasteners to
mount an actuator to your machine frame with an engagement depth of two times the screw diameter for tapped holes.
IMPORTANT! Tighten four cap screws to 12.24 Nm (9.0 ft-lb) max. Failure to properly tighten the screws can a󰀨ect normal
operation, damage the actuator and/or cause possible premature actuator failure.
3.2.2 Feedback Device Alignment
Every GTX Series actuator is mounted, aligned and tested using the customer-specied feedback device and amplier (or
an equivalent amplier) to ensure proper feedback alignment and operation. Should an installed feedback device become
misaligned or there is a change in amplier status, contact the Exlar factory to make arrangements to have the alignment
readjusted.

GTX Installation & Maintenance Instructions | 9www.exlar.com | 952.500.6200
3.2.3 Anti-rotation Assembly
To keep the extending rod from rotating, Exlar o󰀨ers the Anti-rotation Assembly shown in Figure 6.
Figure 6 – Anti-rotation Assembly (shown in standard location)
GTX060: 2.5 mm Hex
GTX080: 2.5 mm Hex
GTX100: 5 mm Hex
Torque 0.6 Nm (0.5 ft-lbs)
Torque 0.6 Nm (0.5 ft-lbs)
Torque 9.5 Nm (7 in-lbs)
GTX060: 4 mm Hex
GTX080: 5 mm Hex
GTX100: 8 mm Hex
Torque 4.6 Nm (3.4 ft-lbs)
Torque 9.5 Nm (7 ft-lbs)
Torque 21.7 Nm (16 ft-lbs)
5 mm Hex
5 mm Hex
6 mm Hex
GTX060: Torque 4.6 Nm (3.4 ft-lbs)
GTX080: Torque 4.6 Nm (3.4 ft-lbs)
GTX100: Torque 12.2 Nm (9 ft-lbs)

10 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
3.2.4 External Limit Switches
This option allows multiple external switches (sold separately) to be externally mounted to the actuator. These adjustable
switches provide travel indication to the controller. A bracket with inductive proximity switches mounts to the outside low-prole
extrusion and senses a traveling magnet located inside the anti-rotate tube.
Figure 7 – Limit switch mounting
GTX060: 2.5 mm Hex
GTX080: 2.5 mm Hex
GTX100: 5 mm Hex
GTX060: Torque 0.6 Nm (0.5 ft-lbs)
GTX080: Torque 0.6 Nm (0.5 ft-lbs)
GTX100: Torque 9.5 Nm (7 ft-lbs)
GTX060: 4 mm Hex
GTX080: 5 mm Hex
GTX100: 8 mm Hex
5 mm Hex
5 mm Hex
6 mm Hex
Torque 4.6 Nm (3.4 ft-lbs)
Torque 9.5 Nm (7 ft-lbs)
Torque 21.7 Nm (16 ft-lbs)
GTX060: Torque 4.6 Nm (4 ft-lbs)
GTX080: Torque 4.6 Nm (4 ft-lbs)
GTX100: Torque 12.2 Nm (9 ft-lbs)
GTX060: 5 mm Hex
GTX080: 5 mm Hex
GTX100: 5 mm Hex
Washer
Washer
Magnet
GTX060: Torque 4.6 Nm (4 ft-lbs)
GTX080: Torque 4.6 Nm (4 ft-lbs)
GTX100: Torque 4.6 Nm (4 ft-lbs)

GTX Installation & Maintenance Instructions | 11www.exlar.com | 952.500.6200
3.3 LUBRICATION
GTX Series actuators are shipped from the factory fully greased and ready for installation. Exlar uses Mobil SHC 220, a high-
performance grease that performs well under extreme pressure. The unique physical properties of the synthetic-based oil
provide outstanding protection against wear, rust, corrosion and high- or low-temperature degradation. Mobil SHC allows for
very low starting and running torque values. The Mobil SHC220 operating range is -40° C to 177° C (-40° F to 350° F).
4.0 ELECTRICAL INSTALLATION
4.1 SAFETY CONSIDERATIONS
DANGER! NEVER attempt to connect or disconnect an actuator with power applied. Dangerous voltages are
present with the potential to cause equipment damage and/or personal injury or death. Many ampliers have voltage
present for a considerable time period after incoming power is removed. Use extreme caution to ensure all ampliers
have discharged all power before proceeding.
WARNING! Do NOT attempt to connect the power cable to the motor feedback connector as this may cause
damage to the connector. Verify that pin patterns match before attempting to connect cables to the actuator.
CAUTION! GTX Series actuators can be operated under a variety of conditions. General safety practices such as
lock-out and tag-out procedures should be followed during the electrical installation of GTX Series actuators.
CAUTION! Motor RMS current must be maintained at a level below the continuous current rating of the GTX Series
actuator or damage to the motor stator will result. The peak current setting must be maintained at a level below the peak
current rating of the GTX Series actuator or damage to the stator will result.
4.2 CABLE ROUTING
To minimize the introduction of contaminants to the connector, route the cables so there is a loop in the cable just prior to
its attachment to the connector (see Figure 8). Units mounted with the connectors on the bottom surface of the actuator
require no looping.
IMPORTANT! Follow cable manufacturers’ recommended cabling bend radius.
Figure 8 – Cable routing

12 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
4.3 AMPLIFIER PINOUTS AND CONNECTIONS
GTX Series actuators are designed to seamlessly integrate with leading amplier manufacturers’ products, allowing the use
of amplier manufacturers’ supplied cables. Actuator connections will vary depending on the amplier used to operate the
actuator. (Consult the GTX Series Actuator catalog or the Exlar website for compatible ampliers.)
4.4 CONNECTING OPTIONAL EQUIPMENT
4.4.1 Feedback Devices – Encoders
Proper feedback device wiring is critical to the operation of the actuator with the selected amplier. Based on the customer’s drive
selection, Exlar installs, aligns, and wires feedback devices to match the drive manufacturer’s specications and cabling.
IMPORTANT! Modifying or improperly wiring the feedback device can cause unstable operation, incorrect operation or no
operation at all.
Typical brushless motor encoders use two data channels labeled “A&B” to provide direction, velocity and position information.
The channel labeled “I” or “Z” has one pulse per revolution and is called the “Index”. The channels identied as “Hall Signals” or
“Commutation Signals” are typically labeled “S1, S2 & S3”, “Hall 1, 2 & 3”, or “Hall A, B & C”, depending on the manufacturer’s
conventions. These signals provide the amplier with the commutation information it needs to properly rotate the motor.
CAUTION! In some cases, improper current limits set in the amplier and incorrect wiring of the feedback device can
lead to motor damage.
4.4.2 Internal Holding Brake
The brake is held open by the supply of 24 Vdc power to a magnetic/mechanical clutch. When there is no power to the brake,
the armature is held in place preventing the inverted roller screw from turning.
4.4.3 External Limit Switch
Depending on the specied switch conguration, the switches are 10 to 30 Vdc powered, PNP or NPN output, with normally
open or normally closed logic operation. Figure 9 provides additional information about available Exlar switches.
Switch
Type
Exlar
Part No. Turck Part No. 3-Wire, 10-30 Vdc
Normally
Closed,
PNP
Output
43404 BIM-UNT-RP6X
-
+
BN
BU
BK
pnp
Normally
Open,
PNP
Output
43403 BIM-UNT-AP6X
-
+
BN
BU
BK
pnp
Normally
Closed,
NPN
Output
67635 BIM-UNT-RN6X
-
+
BN
BU
BK
npn
Normally
Open,
NPN
Output
67634 BIM-UNT-AN6X
-
+
BN
BU
BK
npn
Figure 9 – Logic switch part numbers

GTX Installation & Maintenance Instructions | 13www.exlar.com | 952.500.6200
5.0 STARTUP
5.1 CONSIDERATIONS FOR STARTUP
5.1.1 Safety Considerations
WARNING! NEVER attempt to connect or disconnect the actuator with power applied. Many ampliers have voltage
present after incoming power is removed. Ensure that the amplier has discharged all power.
CAUTION! Do NOT exceed the maximum input voltage for GTX Series actuators (460 Vac).
5.1.2 Amplier Software
Many ampliers o󰀨er software that allows the user to enter the above parameters or download “motor data les” that dictate how
the feedback must be set up on the motor. There parameters are available in the GTX Series Actuator catalog or on the Exlar
website. NOTE: Entering motor parameter data to some ampliers may require assistance from the amplier manufacturer.
5.1.3 Rotary-to-Linear Motion Relationship The relationship between the rotary motion of the motor and the linear
motion of the actuator is based on the following parameters:
LD= Rev x R
LS= [RPM/60] x R
LF= [T x (2p x E/R)]
where:
E = E󰀩ciency
LD= Linear distance traveled
LS= Linear speed
LF= Linear force
R = Roller screw lead
REV = Motor revolutions
RPM = Motor revolutions per minute
T = Motor torque
NOTE: Each of the above relationships requires proper anti-rotation of the actuator rod.
5.1.4 Amplier Wiring
Each brand of brushless motor ampliers may have unique wiring requirements, parameter settings, and operational principles
that a󰀨ect how the actuator operates. For more information on sizing and selecting GTX Series actuators and the brushless
servo motor ampliers used to power them, consult the sizing and selection section of the GTX Series actuator catalog.
5.2 GENERAL STARTUP PROCEDURE
IMPORTANT! Exlar recommends testing new systems prior to live operation (see example startup procedure below).
1. Connect wiring or cables from the amplier to the actuator using cables supplied by the drive manufacturer.
CAUTION! Verify that pin patterns match before attempting to connect cables to the actuator.

14 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
2. Apply input power to the amplier.
CAUTION! Motor RMS current must be maintained at a level below the continuous current rating of the GTX
Series actuator or damage to the motor stator will result. The peak current setting must be maintained at a level below the
peak current rating of the GTX Series actuator or damage to the motor stator will result.
3. Input key motor parameters into the amplier settings.
NOTES:
• Some drives require motor les to be input. For additional guidance regarding amplier-specic settings or operation,
consult the amplier manufacturer.
• Motor parameters and motor les can be found on the Exlar website.
• Set peak current less than two times the current rating on the actuator label.
4. Enable the amplier.
5. Download parameters to the amplier.
6. Run “auto-tune” or “auto-commutate” to double-check alignment.
7. If necessary, re-download parameters to the amplier.
8. In Jog mode, index the actuator rod at 10% of the rated actuator speed.
9. Check to ensure the linear distance traveled matches the theoretical distance based upon motor revolutions and roller
screw lead.
10. Review end-of-travel limits internal to the actuator and set maximum revolutions per extend/retract direction to ensure end-
of-travel limits are not reached.
CAUTION! Do NOT exceed the actuator’s physical travel limits. End-of-stroke impacts can cause permanent
damage to the actuator.
11. Create an index program to cycle the actuator in both the extend and retract directions at rated speed.
12. Set acceleration to 10 times the rated actuator speed.
13. If the actuator cycles without any amplier error messages or abnormal behavior, couple the actuator to the load and begin
commissioning the overall system.
NOTES:
• GTX Series actuators can be operated at current
levels two times the current rating for short
amounts of time.
• When operating the actuator in the peak current
range, follow the duty cycle limits shown in Figure
10.
120
100
80
60
40
20
0
0 0.5 1.0 1.5 2.0 2.5 3.0
Normalized Continuous Current (Motor)
% Duty Cycle
Duty Cycle
100.00
34.00
22.00 10.00
4.00
Figure 10 – Duty cycle for peak current operation

GTX Installation & Maintenance Instructions | 15www.exlar.com | 952.500.6200
6.0 MAINTENANCE PROCEDURES
6.1 LUBRICATION
GTX Series actuators lubricated with grease require periodic inspection and renewal of the bearing and roller screw grease to
maximize actuator life. Maintenance indicators during a physical inspection include:
• Contamination of grease with foreign matter
• Leaking seals
• “Burnt” smell of the grease
• Grease is gritty in appearance
• Grease is dehydrated (dried out)
Although application-specic performance makes it di󰀩cult to provide an exact number of hours of operation before
maintenance is required, the following factors will help determine lubrication maintenance cycles.
Temperature – Temperature is the most signicant factor a󰀨ecting grease life. Exlar’s testing of Mobil SHC 220 synthetic
grease indicates ideal performance operation in ambient temperature ranging from 32° C to 55° C (90° F to 130° F). Within
this temperature range, the grease has a long service life. Operation In temperatures above this range decreases the e󰀨ective
grease life. For every temperature rise of 15° C (60° F), grease life is reduced by approximately 50%.
Speed – The rotational speed of the actuator will generate heat (thus raising the grease temperature) and potentially resulting
in lubricant being thrown o󰀨 the roller screw.
Load – Load contributes to the stress applied to the roller screw mechanism and the pressure applied to the grease thus
impacting the overall lubricant life and relubrication interval. Load directly impacts the amount of power put into the actuator
adding to the heat generated by roller screw speed. This heat is transmitted to the lubricant eventually separating the oils from
the thickener and reducing grease life.
Orientation – Gravity can cause grease migration over time, especially in vertical applications at elevated temperatures.
Figure 11 provides a general guideline for recommended lubrication renewal cycles.
RMS
Rotational
Speed (RPM)
Recommended Grease Renewal Period (hours)
Case Temp.
65° C (149° F)
Case Temp.
80° C (176° F)
Case Temp.
95° C (203° F)
250 10,000 5,000 2,500
500 8,500 4,250 2,125
1000 6,000 3,000 1,500
1500+ 3,500 1,750 875
Figure 11 – Recommended lubrication renewal cycles
Grease renewal procedure (refer to Figure 12)
1. Remove the four bolts connecting the faceplate and any mounting accessories from the front of the actuator.
2. Remove the roller screw by turning it counter clockwise and threading it out of the cylinder. To remove the screw, it may be
necessary to hold the roller screw cylinder to keep it from turning. Turning the shaft will help force the faceplate assembly
to break free of its housing.
3. Use a brush to work approximately 10 cm3(0.6 in3) of grease into the roller screw assembly for every 100 mm (3.9 in) of
stroke length. Be sure all the threaded surfaces of the screw assembly are covered. 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. IMPORTANT! Excess grease does not improve lubrication and requires greater torque when
the motor is returned to operation.

16 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
4. With the actuator in the vertical position and 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 roller screw cylinder.
5. Slowly turn the roller screw clockwise in ¼- to ½-turn increments while maintaining contact with the interior threaded
cylinder (ITC). This helps align the threads on the roller screw with the threads in the ITC. Do NOT force the roller screw
into the cylinder.
If the roller screw does not turn freely, remove it and begin again. When the screw is properly threaded into the cylinder, it will
roll freely into the actuator. NOTE: When the roller screw reaches the portion of the cylinder that contains the motor magnets,
it will be more di󰀩cult to turn because of the magnetic eld of the magnets. THIS IS NORMAL. Continue to thread the roller
screw into the cylinder until it reaches the bottom (it will become di󰀩cult to turn and the motor and bearings will begin to rotate
with it).
6. Place a small amount of seal lubricant on the inside surface of the seal/bushing assembly.
7. Carefully slide the faceplate over the actuator rod end while guiding the four cap screws through their respective holes in
the rear end cap of the actuator. Ensure the faceplate seats completely and squarely on the front of the actuator.
NOTE: The seal is a tight t on the rod end. Use caution to avoid damaging the seal on the threads of the extending rod.
The inner surface of the faceplate provides the pre-loading for the bearings, so it is important that it be properly seated.
Torque the four cap screws of the faceplate assembly to 12.2 Nm (9 ft-lb).
8. For actuators equipped with an external anti-rotate mechanism and/or limit switch assembly, slide the rod of the anti-rotate
mechanism rod into the guide bushing. Tighten the two screws used to hold the anti-rotate assembly or the four screws used
by the limit switch assembly to clamp that assembly to the actuator rod.
GTX060: 5 mm Hex; 18 mm Long
Torque 4.6 Nm (3.4 ft-lbs)
GTX080: 6 mm Hex; 25 mm Long
Torque 12.2 Nm (9 ft-lbs)
GTX100: 8 mm Hex; 30 mm Long
Torque 23 Nm (17 ft-lbs)
Roller Screw
6.2 SEAL MAINTENANCE
Exlar recommends that the faceplate assembly containing
the main rod seal and bushing assembly be replaced
during the re-lubricating procedure. To have this service
performed for you, contact the Exlar Returns Department
to send your unit in for service (see Section 8.0, “Product
Returns”). If any additional maintenance or repair is
needed, consult Exlar. It may be necessary to return the
actuator to the factory for refurbishment.
6.3 REPLACEMENT FACEPLATE ASSEMBLY
KIT
Faceplate Model Part Number Parts Included
GTX060
GTX080
GTX100
PN 77565
PN 71457
PN 75536
Faceplate, O-ring,
bushing, seal, wiper,
and fasteners
Figure 13 – Faceplate Assembly Kit
Figure 12 – Grease renewal reference

GTX Installation & Maintenance Instructions | 17www.exlar.com | 952.500.6200
7.0 TROUBLESHOOTING
GTX Series actuators are engineered for years of trouble-free operation. If problems are encountered while installing or using
the actuator, the information in Figure 14 may help solve the problem.
Symptom / Trouble Possible Cause / Troubleshooting Procedure
No response from actuator. • Ensure the amplier is enabled.
• Check amplier for faults that may indicate problem.
• Check for proper wiring.
Actuator seems to be enabled (receiving
current) but is not operating or is operating
erratically.
• Amplier may be improperly tuned. Check all gain settings. If a motor le or parameters
specic to your amplier/actuator combination have been supplied by Exlar, be sure that
they are entered or downloaded properly.
• Amplier may be set up improperly for the particular motor being used. Check amplier
settings for number of poles, voltage, current, resistance, inductance, inertia, etc.
• Feedback wiring may be incorrect.
• Feedback conductors are touching, or feedback cable may be damaged.
• Motor phases are wired incorrectly or in incorrect order (R,S,T).
• Feedback (resolver or encoder) is improperly aligned. Contact Exlar.
Actuator cannot move load. • Load is too large for the capacity of the actuator or too much friction is present.
• Excessive side load.
• Misalignment of output rod to load.
• Amplier has too low of current capacity or is limited to too low of current capacity.
Actuator housing moves or vibrates when
shaft is in motion.
• Check actuator mounting. Ensure that the actuator is securely mounted.
• Amplier is improperly tuned (wrong gain settings). Re-tune amplier.
Output rod rotates during motion and thus
does not provide proper linear motion.
• Install Exlar anti-rotation assembly or incorporate anti-rotation into the application.
Limit switches not functioning. • Limit switches are wired improperly. Refer to manual.
• The device being driven by the limit switches is not compatible with the electrical output
of the limit switch. Check device requirements.
• Switches have been damaged by improper wiring or improper voltage applied. Replace
switches.
Brake does not hold load in place. • Load is larger than the capacity of the brake-check load level against actuator rating.
• Brake is not engaged. (Power is not removed, or only partially removed from brake).
• Brake is being used as other than a power-loss holding brake.
Actuator is overheating. • Insu󰀩cient cooling for application requirements.
• Actuator is being operated outside of continuous ratings.
• Amplier is poorly tuned causing excessive unnecessary current to be applied to motor.
Check gain settings.
Figure 14 – Troubleshooting guidelines
8.0 PRODUCT RETURNS
Procedure to return products for repair or replacement:
1. Before requesting an RGA number, please contact Exlar Technical Support to see if it is possible to resolve the issue prior
to return.
2. If it is determined that an RGA number is required, please do so by completing an online RGA request form found on the
Exlar website. For international repairs, closely follow instructions provided by the Exlar Returned Goods Administrator.
Failure to comply with issued instructions may result in delays for repair and return.

18 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
9.0 CERTIFICATIONS
CERTIFICATE OF COMPLIANCE
Certificate Number
E225288
Report Reference
E225288-20171030
Issue Date
2020-MAY-06
Bruce Mahrenholz, Director North American Certification Program
UL LLC
Any information and documentation involving UL Mark services are provided on behalf of UL LLC (UL) or any authorized licensee
of UL. For questions, please
contact a local UL Customer Service Rep resen
tative at http://ul.com/aboutul/locations/
Page
1 of 2
Issued to:
EXLAR CORP
18400 W 77TH ST
CHANHASSEN MN 55317
This certificate confirms
that
representative samples of
COMPONENT - SERVO AND STEPPER MOTORS
Refer Addendum Page for Models/Product
Have been investigated by UL in accordance w
ith the
component
requirements in the Standard(s) indicated on
this Certificate.
UL
Recognized components are incomplete
in certain constructional features or restricted in
performance capabilities and are intended for
installation in
complete equipment su
bmitted for investigation to UL LLC.
Standard(s) for Safety:
UL 1004-1 - Rotating Electrical Machines –General
Requirements
UL 1004
-6 - Servo and Stepper Motors
CSA C22.2 No. 100 - Motors and Generators
Additional Information:
See the UL Online Ce
rtifications Directory at
https://iq.ulprospector.com
for additional information.
This Certificate of Compliance does not provide authorization to apply the UL Recognized Component Mark. Only
the UL Follow-Up Services Procedure provides authorization to apply the UL Mark.
Only those products bearing the UL Recognized Component Mark should be considered as being UL Certified
and covered under UL’s Follow-Up Services.
Look for the UL Recognized Component Mark on the product.
CERTIFICATE OF COMPLIANCE
Certificate Number
E225288
Report Reference
E225288-20171030
Issue Date
2020-MAY-06
Bruce Mahrenholz, Director North American Certification Program
UL LLC
Any information and documentation involving UL Mark services are provided on behalf of UL LLC (UL) or any authorized licensee
of UL. For questions, please
contact a local UL Customer Service Rep resen
tative at http://ul.com/aboutul/locations/
Page
2 of 2
This is to certify that representative samples of the product as specified on this certificate were tested
according to the current UL requirements.
Models/Product:
Component –Class H Insulated Servo motors.
GTX060, GTX080, GTX100 Series Linear Actuators, configurations and ratings indicated in the following table:
Model
Ratings
Motor
V Max
Max Amps
Insulation Class
Phase
Housing
Ambient, C
Duty Cycle
GTX080-###-##-X-#-##-
####-#-#-#
460 AC
5.25
H
3
TENV
40
S1/Cont or Int
GTX080-###-##-D-#-##-
####-#-#-#
48 DC
24.5
H
3
TENV
40
S1/Cont or Int
GTX100-###-##-X-#-##-
####-#-#-#
460 AC
12.3
H
3
TENV
40
S1/Cont or Int
GTX060-###-##-X-#-##-
####-#-#-#
460 AC
4.0
H
3
TENV
40
S1/Cont or Int
GTX060-###-##-D-#-##-
####-#-#-#
48 DC
20.8
H
3
TENV
40
S1/Cont or Int
*
“#” – Represents a single alphanumeric character, indicating exterior mechanical, shaft/thread,
and cosmetic configurations.

GTX Installation & Maintenance Instructions | 19www.exlar.com | 952.500.6200
NOTE: GTX Series actuators that are intended as components in a third-party machine in which the enclosure and assembly
will a󰀨ect the EMC emissions, are covered by the EMC standard that relates to the nal product.
Per EU directives implemented on April 20th, 2016, the following procedures must be followed by importers and distributors.
9.1 IMPORTER REQUIREMENTS
• Importers shall indicate their name, registered trade name or registered trade mark, and the postal address at which they
can be contacted on the apparatus (unless that is not possible, in which case it should be included on the packaging or in an
accompanying document).
• Importers shall ensure that the product is accompanied by instructions and safety information in a language which can be
easily understood by end-users, as determined by the Member State concerned.
• Importer is to translate the EU declaration of conformity into the languages required by the member state(s), where the
product is sold. Importers shall keep a copy of the EU declaration of conformity for 10 years.
• Importers shall provide a reasoned request from a competent national authority and provide it with all the information and
documentation in paper or electronic form necessary to demonstrate the conformity of a product in a language which can be
easily understood by that authority.
• Importers shall ensure that, while apparatus is under their responsibility, its storage or transport conditions do not jeopardize
its compliance with the safety objectives.
• Importer shall take corrective action necessary when they consider or have reason to believe that the product is not in
conformity with its directive(s).
9.2 DISTRIBUTOR REQUIREMENTS
• Distributors shall indicate their name, registered trade name or registered trade mark and the postal address at which they
can be contacted on the apparatus (unless that is not possible, in which case it should be included on the packaging or in an
accompanying document).
• Distributor shall ensure that apparatus is accompanied by instructions and safety information in an appropriate language.
Distributor shall translate the EU declaration of conformity into the languages required by the member state(s), where the
product is sold. Distributors shall keep a copy of the EU declaration of conformity for 10 years.
• Distributor shall ensure that, while apparatus is under their responsibility, its storage or transport conditions do not
jeopardize its compliance with the safety objectives.
• Distributor shall take corrective action necessary when they consider or have reason to believe that the product is not in
conformity with its directive(s).

20 | GTX Installation & Maintenance Instructions Curtiss-Wright | Rev J | PN75557 | 12/19/23
10.0 WARRANTY AND LIMITATION OF LIABILITY
WARRANTY AND LIMITATION OF LIABILITY: Please see our warranty on our website here: About | Terms -Conditions | Curtiss-
Wright Actuation Group (cw-actuation.com) for details.
Enabled products incorporate technology that is licensed from Rockwell Automation Technologies, Inc. Rockwell Automation
Technologies, Inc. has not technically approved, nor does it warrant or support these products. All warranty and support for these
products and their application is provided solely by Exlar Corporation.