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Ordering Info



Path 7




Ordering Info



Design Features

  • IP66: Totally protected against dust and water jets from any direction
  • Operation over large temperature range: -20 to +70° C
  • Low-friction seal minimizes direction reversal hysteresis to allow small, precise positioning
  • Shaft aperture option with three available sizes: 30 mm, 80 mm, and 130 mm
  • Excellent accuracy (to 2 arc sec) and repeatability (to 1.5 arc sec)
  • Axial load capacity to 130 kg
  • Up to 200 rpm continuous rotation speed
  • Direct-drive motor provides rapid precision motion with no gear backlash

The ASRT series is available in three different sizes for a variety of load and motor torque ratings. A shaft aperture option on all sizes allows for electrical, pneumatic, or fluid feedthrough. Offered with a high-accuracy optical (incremental or absolute) non-contact encoder or with a robust magnetic non-contact encoder, the ASRT has many feedback options to meet the specific requirements for many tough applications.

Standard operating temperature for the ASRT is 0 to 70°C. Operation below freezing requires the optional air-purge and dessicant. Air-purged stages can operate from -20 to 70°C.

A polymer-based paint on the housing and hard-coated tabletop is standard for corrosion protection. The stage has optional tan, black, and white paint colors.

Rotary speeds of up to 200 rpm are available. The ASRT includes an electrically grounded shaft and housing to protect against electrical shock and eliminate RF re-radiation, and housing grounding points are included. Circular sealed connectors are standard, while options include desiccant cartridge, air purge option, and mounting flange accessory.

Superior Mechanical Design

Dual large-diameter bearings are used to maximize performance with respect to tilt error motion, moment stiffness, and repeatability. The large diameter bearings permit large payloads without compromising performance.

Brushless Direct-Drive

To maximize positioning performance, the ASRT series utilizes Aerotech’s brushless, slotless motor. This motor has all of the advantages of a brushless direct-drive motor – no brushes to wear, no gear trains to maintain, and high acceleration and high speeds. The low inertia and zero backlash make the ASRT the ideal solution for applications requiring frequent directional changes.

Aerotech manufactures a wide range of servo amplifiers and advanced controllers to provide a complete integrated package.








Ordering Information

ASRT Mechanical-Bearing Direct-Drive Sealed Rotary Stage

Option Description
ASRT185DR ASRT185DR mechanical-bearing direct-drive sealed rotary stage, 185 mm frame size
ASRT245DR ASRT245DR mechanical-bearing direct-drive sealed rotary stage, 245 mm frame size
ASRT300DR ASRT300DR mechanical-bearing direct-drive sealed rotary stage, 300 mm frame size

Aperture (Optional)

Option Description
-A Clear aperture thru stage, 30 mm (ASRT185DR); 80 mm (ASRT245DR); 130 mm (ASRT300DR)

Feedback (Required)

Option Description
-E1 Incremental optical encoder, 1 Vpp
-E2 Absolute optical encoder
-E3 Incremental magnetic encoder, 1 Vpp
  1. -E3 feedback option not available with ASRT300DR

Exterior Paint Color (Required)

Option Description
-PNT1 Desert tan
-PNT2 Black
-PNT3 White

Mounting Orientation (Required)

Option Description
-MT1 Vertical axis of rotation
-MT2 Horizontal axis of rotation

Air Purge (Optional)

Option Description
-PR Air Purge

Desiccant Cartridge (Optional)

Option Description
-DSC Desiccant cartridge

Flange Mounting (Optional)

Option Description
-F Flange mounting kit
  1. -F flange mounting kit available only with -MT1 mounting orientation.

Cover (Optional)

Option Description
-CV Cover shroud kit
  1. CV cover shroud kit available only with -MT2 mounting orientation.

Metrology (Required)

Option Description
-PL1 Metrology, uncalibrated with performance plots
-PL2 Metrology, calibrated (HALAR) with performance plots


Aerotech offers both standard and custom integration services to help you get your system fully operational as quickly as possible. The following standard integration options are available for this system. Please consult Aerotech if you are unsure what level of integration is required, or if you desire custom integration support with your system.

Option Description
-TAS Integration - Test as system
Testing, integration, and documentation of a group of components as a complete system that will be used together (ex: drive, controller, and stage). This includes parameter file generation, system tuning, and documentation of the system configuration.
-TAC Integration - Test as components
Testing and integration of individual items as discrete components. This is typically used for spare parts, replacement parts, or items that will not be used or shipped together (ex: stage only). These components may or may not be part of a larger system.

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