Actuator/Motor delivers up to 12,500 lbf continuous thrust.

Press Release Summary:

Combining brushless servo motor, inverted roller screw, and encoder/resolver feedback source in single assembly, Series GSX offers 3-18 in. stroke and linear speed of 40 ips. Planetary design of roller screw allows it to be accelerated at 33 ips and rotated up to 5,000 rpm faster than comparably sized ball screws. All converting components are mounted within sealed, IP65-rated motor housing. Series GSX can be run for up to 10,000 hours between re-greasing.

Original Press Release:

Actuator and Motor in One Compact Unit Offers Long Life and High Load Capacity

Chanhassen, MN - September 9, 2005 -- The GSX Series actuators employ an inverted roller screw mechanism to convert the rotary motion of the brushless motor into high speed, high thrust linear motion. This design combines a brushless servo motor, an inverted roller screw and an encoder/resolver feedback source into a single compact assembly eliminating the cost and complexity of a systems engineering approach.

With its segmented motor stator design, T-LAM(TM), the improved efficiencies are a result of the limited heat generation qualities, the elimination of end turns in the stator, and the use of thermally conductive potting which removes the parts most susceptible to failure in a traditional stator. The design also benefits from interface insulation against the high voltage and currents of today's servo drives.

The large contact area of the roller screw in the GSX Series allows high force characteristics while guaranteeing long life - 15 times the life of comparably sized ball screws is common - even in the most demanding repetitive applications. The planetary design of the roller screw allows it to be accelerated at 33inch/sec and rotated faster (up to 5,000 rpm) than comparably sized ball screws. GSX Series offer 3 to 18 inch strokes, 40 inch per second linear speed, and up to 12,500 lbf continuous thrust capacity. This mechanism has a lead accuracy of 25*m/300mm for high precision operation and can also be supplied with zero backlash.

The brushless servo design of the GSX series linear actuators allows them to be used in state-of-the art closed loop servo systems, where electronic control of positioning and velocity is required. In these systems position feedback can be provided in a number of different forms to match customer specifications, including resolvers, encoders or internally mounted linear position feedback sensors.

GSX series actuators offer additional benefits in the form of contamination protection. In conventional rotary to linear devices the critical mechanisms are exposed to the environment and therefore require frequent inspection, cleaning and lubrication. In contrast, all converting components in the GSX series actuator are mounted within the sealed motor housing, which is IP65 rated, (IP67 upon request). The smooth extending rod allows the use of a bushing and seal arrangement, which prevents abrasive particles and other forms of contamination from entering the actuator's critical mechanisms. This assures trouble-free operation even in the most severe environments.

Lubrication requirements for the GSX series actuators are minimal. Designed to be lubricated with either grease or recirculated oil, they can be run for up to 10,000 hours between re-greasing. Recirculated oil lubrication eliminates the need for lubrication maintenance altogether: an oil lubricated GS actuator will operate indefinitely with no servicing requirements.

GSX actuators are suitable for use in many demanding applications including, automatic tool changers, dispensing, wire guiding, chip and wafer handling, robot manipulation, testing, web guidance, indexing material cutting, tension control, volumetric pumps, simulation testing, automated assembly, injection molding and riveting, joining and fastening.

Exlar Corporation designs, manufactures and sells linear and rotary motion products worldwide. For general product information, contact Exlar Corporation, 1470 Lake Drive West, Chanhassen, MN 55317, phone 952-368-3434, and fax 952-368-4877. Visit our website at

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