... ,Slow, Long Strokes; 2,belt Transmission; 3,low Torque Demand. Beam Pumping Units1,Slow, Long Strokes2,belt Transmission;3,low Torque ... Min of Strokes Per MinuteVery LowCounterweight Base: t6.14.64.22.72.41.91.7Counterweight-Max Aux.: t8.69.07.27 ... : Automatic Braking System is available according to the customers requirements. Beam Pumping Units