GU-X220 Heavy Industrial Gear Unit

A split-housing industrial gear unit built to recognised international gear standards. Pressure-fed lubrication, full instrumentation ports and a bearing arrangement that can be inspected without lifting the rotor out.

How this frame is rated

The GU-X220 carries 42,000 Nm of rated output torque, calculated on tooth flank and root capacity to international gear rating standards at a service factor of 1.0. Ratios run from i 6.3 to i 200, which at 1450 rpm input puts the output shaft between 7.3 and 230.2 rpm. Motors from 15 to 400 kW bolt to the input.

With the largest listed motor the frame reaches its mechanical torque limit at about i 16.4. Below that ratio the motor governs and output torque still climbs with the reduction; above it the frame governs, and extra ratio buys you speed reduction only. That is the knee you can see on the characteristic chart further down this page.

What usually decides the selection

Thermal capacity is 210 kW of continuous throughput without auxiliary cooling at 20 °C ambient. Permissible radial force at the shaft mid-point is 145,000 N; move the load towards the shaft end and that figure falls quickly, so tell us where the pulley actually sits. Housing is Welded steel plate with cast bearing bosses, protection IP66, and the unit weighs 2,150 kg dry.