Travel Options

AR = External Anti-rotate Assembly

This option provides a rod and bushing to restrict the actuator rod from rotating when the load is not held by another method. Shorter actuators have single sided anti-rotation attachments. Longer lengths require attachments on both sides for proper operation.

RB = Rear Electric Brake

This option provides a rear internal holding brake for the GSM Series actuator. The brake is permanent magnet activated and electrically released. 24 VDC.

PF = Preloaded Follower

This option offers a true zero backlash follower for the GSM Series actuator. The dynamic load rating of zero backlash, preloaded screws is 63% of the dynamic load rating of the standard non-preloaded screws. The calculated travel life of a preloaded screw will be 25% of the calculated travel life of the same size and lead of a non-preloaded screw for the same application. Preloaded follower is not available with LT linear feedback option.

XT = Special Travel Option Selections

The XT option can be used to specify various special travel options on the GSM Series of Linear Actuators. Because this designation can be used to specify many options, it is important that an order including the -XT option spell out in detail, the exact options being selected by the including of the -XT in the model number.

It is recommended that prior to ordering an actuator including the -XT specifier that a quote be obtained through Exlar's special products application engineers for the desired options, and that quote be referenced on, or included with any order placed.

Protective Bellows:

This option provides an accordion sytle protective bellows to protect the main actuator rod from damage due to abrasives or other contaminants in the environment in which the actuator must survive. The standard material of this bellows is S2 Neoprene coated nylon, sewn construction. This standard bellows is rated for environmental temperatures of -40 degrees to 250 degrees F. Longer strokes may reuire the main rod of the actuator to be extended beyond standard length. Not available with extended tie rod mounting option. Consult Exlar applications engineers for details.

High Temp Protective Bellows

This option provides an accordion style protective bellows to protect the main actuator rod from damage due to abrasives or other contaminants in the environment in which the actuator must survive. The high temperature material of this bellows is D1 Teflon coated fiberglass, sewn construction. This standard bellows is rated for environmental temperatures of -67 degrees to 500 degrees F. Longer strokes may require the main rod of the actuator to be extended beyond standard length. Not available with extended tie rod mounting option. Consult Exlar applications engineers for details. 

Splined Main Rod

This option provides a main rod manufactured of ball spline shafting, and the front seal and bushing assembly replaced with a ball spline nut to provide the anti-rotate function without using an external mechanism. Rod diameters are the closest metric equivalents to standard Exlar rod sizes. This option is NOT sealed in any way. This option is not suitable for any environment in which contaminants come in contact with the actuator, and may enter the actuator.

Manual Drive, Handwheel

This option provides for a manual drive handwheel on the side of the actuator.  The handwheel has an engagement/disengagement lever which allows for disengagement of the handwheel during operation.  This engagement/disengagement lever is not tied to the operation of the motor and requires that the user guarantee its disengagement before operating the motor. Not available with holding brake unless application details are discussed with Exlar Applications Engineer.

Manual Drive, Side Hex

This option provides for a hex shaft at the rear of the actuator for manual operation.  The hex shaft is directly coupled to the motor and can be turned by hand with a compatible wrench.  The hex shaft is enclosed by a sealed cap durig operation. Not available with holding brake unless application details are discussed with Exlar Applications Engineer.

Motor Options

IP Ratings for Exlar Actuators

The standard IP rating for Exlar actuators is IP54S or IP65S.  Ingress protection is divided into two categories: solids and liquids.  For example, with IP65 the three digits following IP represent different forms of environmental influence.

• The first digit represents protection against ingress of solid objects.
• The second digit represents protection against ingress of liquids.
• The suffix digit represents conditions of motion during the test.

Digit 1 - Ingress of Solid Objects

The IP rating system provides for 6 levels of protection against solids.

Digit 2 - Ingress of Liquids

The IP rating system provides for 9 levels of protection against liquids.

Suffix

L1, L2, L3 = Adjustable External Travel Switches

This option allows up to 3 external switches to be included with the GSM Series actuator. These switches provide travel indication to the controller and are adjustable. Must purchase external anti-rotate option with external limit switches.

XL = Non-Standard Lubrication

This option provides for indication in the model number that the customer has specified a lubrication other than the standard provided by Exlar, Mobilith SHC220.  Specials include other greases such as JAX FG-2 food grade, Mobilgrease 28, or the use of oil cooling.

Motor Speed Designators

All Exlar T-LAM^™ motors and actuators carry a standard motor speed designator as defined below. This is representative of the standard base speed of the motor, for the selected bus voltage.

If the model number is created and the location for the motor speed designator is left blank, this is the base speed to which each motor will be manufactured. The model number can also be created including this standard speed designator.

Exlar also provides the flexibility to manufacture all of its T-LAM products with special base speeds to match the customer's exact application requirements. This may be a higher than standard speed motor, or lower base speed than standard which will allow the customer to get the required torque, at a speed optimized to their application, and use the minimum amount of current from their amplifier.

The callout for a special speed is configured in the model number by using a two digit code from 01-99. These numbers represent the number, in hundreds, of RPM that will be the base speed for the particular motor.

For example, an GSM30-0301-MFM-EM@-138-30 motor that normally has a 3000 rpm standard winding, can be changed to a 3300 rpm winding by changing the -30 to a -33. It can be changed to a 5000 rpm winding by changing the -30 to a -50.

Changing this speed designator will change the ratings of the motor, and these must be obtained from Exlar applications engineers. Also, it is not possible to produce every possible speed from 01-99 for each motor at each voltage, so please contact Exlar applications engineers for confirmation of the speed that is desired for the application.

Motor Options

GSM Motor options are described with a 3 digit code. The first digit calls out the stack length, the second the rated bus voltage, and the third the number or poles of the motor. Refer to the mechanical/electrical specifications for motor torque and actuator rated force.

Feedback Options

LT = ICT including conditioner. This option provides for an actuator containing an internally mounted ICT transducer spanning the full stroke of the actuator. LT is not available with absolute feedback. Inquire with Exlar engineering for details and conditioner output preference.

Due to the variability in size of some feedback devices, especially absolute feedback devices which are often very large relative to the size of the actuator motor, the actual size of the actuator may differ in length and width from these drawings for feedback types other than standard resolvers and standard encoders. Please consult Exlar for details. In the event that you order an actuator that differs from these standard dimensions, you will be sent a drawing of the final configuration of your actuator for approval.

Housing Options

EN = Electroless Nickel Plating

This option provides for an actuator with electroless nickel plating.

HC = Type III Hard Coat Anodized, Class 1

This option provides an actuator with type III hard coat anodized coating. Class 1, no dye.

XH = Special Housing Option

Any housing option that is not designated by the above codes should be listed as XH and described at time of order. All special options must be discussed with Exlar Engineering. All special options must be discussed with Exlar Engineering.

Rod End Attachments

• Rear Clevis Pin
• Spherical Rod Eye
• Rod Eye
• Rod Clevis