Torque ratings that define the duty cycle
The GBX1600041084D is a 160 mm-frame planetary gearbox with a 4:1 reduction ratio, straight-tooth profile, and black anodized aluminium housing. It delivers 450 N.m continuous output torque and peaks at 720 N.m maximum — the continuous figure governs sizing for servo or stepper applications where the load cycle exceeds the thermal time constant of the gearbox. Rated service life is 30,000 hours at 100 rpm and 30 °C ambient. The life rating drops if the load cycle runs above the continuous torque line or if the ambient pushes past 30 °C — plan the duty profile against the 450 N.m continuous ceiling, not the 720 N.m peak.
Backlash and stiffness for positioning loops
Maximum torsional backlash is 6 arc.min — this is the angular slop at the output shaft under reversing load. For a pick-and-place axis or indexing table, 6 arc.min translates to roughly 0.35 mm of positional uncertainty at a 200 mm radius. Torsional rigidity is 38 N.m/arcmin, meaning the shaft twists 1 arcmin for every 38 N.m of applied torque before the gear teeth take up the load. The 7.78 g.cm² moment of inertia reflected to the input side is low enough that a 400 W servo can accelerate the gearbox plus load without the reflected inertia ratio exceeding 10:1 — a common stability boundary for servo tuning.
Load capacities and environmental limits
Maximum axial force on the output shaft is 6000 N at 100 rpm for the full 30,000-hour life, or 8000 N if the service life is limited to 10,000 hours. Maximum radial force applied at mid-shaft is 4200 N for the longer life, 6000 N for the shorter. Both figures assume the load is applied at 100 rpm and 30 °C — derate for higher speeds or temperatures. Shaft output seal is rated IP54, so the gearbox handles dust and splashing water at the shaft exit but is not submersible. The gearbox is lubricated for life — no oil changes or regreasing intervals to schedule. Efficiency is 96 %, which means 4 % of the input power dissipates as heat inside the housing. At 450 N.m output and 100 rpm input, that is roughly 190 W of heat — the anodised aluminium body sheds it by convection, but a confined mounting pocket may need forced airflow to stay below the 90 °C ceiling.
Noise and sourcing posture
Noise level is 70 dB at 1 m, no-load — this is the acoustic floor from gear mesh and bearing noise. Under load the level rises with torque; a 70 dB background in a control cabinet means the gearbox is audible but not objectionable in a typical machine shop environment.