GU-K97 Helical-Bevel Gear Unit

Mid-size right-angle unit for continuous process duty. Four bearing planes carry the bevel thrust so overhung load capacity stays high right through the ratio range.

How this frame is rated

The GU-K97 carries 1,750 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 8.12 to i 286.4, which at 1450 rpm input puts the output shaft between 5.1 and 178.6 rpm. Motors from 0.75 to 30 kW bolt to the input.

With the largest listed motor the frame reaches its mechanical torque limit at about i 9.3. 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 31.5 kW of continuous throughput without auxiliary cooling at 20 °C ambient. Permissible radial force at the shaft mid-point is 21,300 N; move the load towards the shaft end and that figure falls quickly, so tell us where the pulley actually sits. Housing is Nodular cast iron, protection IP66, and the unit weighs 210 kg dry.