Gear, Servo / Stepper 20/35/45mm aperture, 60/100/120mm turn table 5 – 32µrad min. inc. motion 7.5-90°/sec max. velocity 50kg load Rotary encoder Details Direct Drive Rotation Stages with High Performance [...] Goniometer Cradle Stages with Mechanical Bearings, Worm Gears and Servo / Stepper Motors Show more WT-85 Motorized Precision Goniometer Aperture, Servo / Stepper 10° rotation range 2 - 17.5µrad min. inc [...] inc. motion 7 - 15°/sec max. velocity 2kg load 30mm aperture Direct encoder option Details Show more WT-100 Motorized Precision Goniometer Aperture, Servo / Stepper 10° rotation range 8.7 - 17µrad min. inc