This Heidolph RZR 1 variable speed stirrer is designed to deliver high torque over a wide speed range. Ideal for continuous stirring of viscous materials. Shift between two speed ranges at standstill. The speed-adjust knob is located on the front; the speed range adjustment is on the side. Stirrers feature thermal overload protection with automatic cut-out for extra safety. The hollow gear shaft permits adjustment of the stirring rod and paddle to any height. Adjustable chuck accepts stirring rod with up to 10mm shaft diameter. Stirrer has an adjustable chuck that accepts stirring rods with up to 8mm (5/16") shaft diameter. Stand is included. Impellors are all available at additional cost - request listing of various
types available.