GU-F127 Parallel Shaft Gear Unit

A three stage parallel offset unit that hangs straight on the driven shaft. No coupling, no baseplate and no alignment procedure – the torque arm takes the reaction and the shaft carries the rest.

How this frame is rated

The GU-F127 carries 3,300 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 6.85 to i 338.6, which at 1450 rpm input puts the output shaft between 4.3 and 211.7 rpm. Motors from 1.5 to 45 kW bolt to the input.

With the largest listed motor the frame reaches its mechanical torque limit at about i 11.6. 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 42 kW of continuous throughput without auxiliary cooling at 20 °C ambient. Permissible radial force at the shaft mid-point is 32,000 N; move the load towards the shaft end and that figure falls quickly, so tell us where the pulley actually sits. Housing is Grey cast iron, protection IP66, and the unit weighs 330 kg dry.