For high output speeds the series 121 frame is designed exclusively for single stage geared units and provides a compact solution for your system design. The 121 Single stage is chosen for its higher output RPM with lower ratios. You will find many 121 Frame gearheads running pumps in the mines, along with other applications.
Gear Unit Ratio (i) : 1.447 – 4.813
Output Torque (Nm) : 10 – 129
MotorPowerRange(kW) : 0.75 – 7.5