Heavy Load Capacity Rotary Positioning Stages provide smooth, continuous adjustment over a full 360° travel range. A precision worm gear drive allows exact angular positioning, and a position locking knob allows the stage to be positively locked in place. This stage offer a 2.75" diameter stage with a calibrated dial and ±60 arcminute Vernier scale. Heavy Load Capacity Rotary Positioning Stages can be combined with metric and English stages that have mounting holes on 4.0" centers (5" ball stages) for multi-axis set ups. These stages have a load capacity of 25lb/11.3kg.