This rotary stage comprising two concentric threaded ring is separated by a precision plain bearing. The inner ring is free to rotate while the outer is held stationery. One clamp screw limits the rotation of one ring relative to the other. The second clamp screw locks both rings together. SPECIFICATIONS:- Range: 360 degree Coarse, 5 degree fine Positioning Accuracy: + 1 degree Dimensions: 200 mm dia. x 35 mm