This variable speed rotator is driven by a continuous-duty motor that can withstand a demanding schedule and long hours of operation.

The apparatus is supplied with a friction drive test tube Head with an aluminum disc with spring clips to hold test tubes; clips are adjustable. Supplied with 31 spring clips to accommodate 10 to 18 mm diameter tubes and 16 clips to accommodate 20 to 30 mm diameter tubes.

You can optionally purchase two optional heads; 1) Tissue Culture Tube Head designed to hold 108 mini tissue culture tubes, each up to 16 mm diameter. Consists of a drum, 12-inch (30.5 cm) in diameter with 108 openings. 2) Twin disc test tube head designed to hold a combination of test tubes, bottles syringes, etc. Tubes are easily removed by deflecting leaf spring between disks. Accepts 22 pieces of glassware each up to 25 mm in diameter or 44 pieces up to 16 mm.

Uses include embedding electron microscopy, tissue-culture specimens, blood cell suspensions, washing of precipitates, disintegrating tablets, extracting, dissolving slow-reacting samples, homogenizing blood solids with plasma, and rotating closed containers for dialysis bags, to mention a few. A unique clamping device utilizes leverage to assure selected motor position and permits positioning of the motor at any point within a 110° arc. The containers remain visible during rotation. The unit has a sturdy, stable, well balanced, compact base that handles substantial loads. A cord-attached speed control module allows convenient placement to avoid danger when starting or stopping rotation