Torque delivery and the numbers that matter
The GBX0600040584D is a 60 mm diameter planetary gearbox with a 4:1 reduction ratio. The continuous output torque is 38 Nm, with a maximum peak of 61 Nm — that 38 Nm figure is the one to size your application against for sustained duty. The 96% efficiency means the thermal loss through the gear train is low; you won't need to derate the upstream servo motor as aggressively as with a worm gear.
Backlash, rigidity, and where the stiffness lives
Maximum torsional backlash is 20 arcmin — this is a standard-precision planetary, not a zero-backlash stage. If your axis reverses load cyclically and position repeatability under 10 arcmin matters, this gearbox will show hysteresis. Torsional rigidity is 2.3 N.m/arcmin, which tells you how much wind-up you get per unit torque; at 38 Nm continuous, expect about 16.5 arcmin of elastic twist before the backlash even comes into play. Moment of inertia reflected to the input is 0.093 g.cm² — low enough that a small servo can accelerate the reflected load without the inertia ratio blowing past 10:1. The straight-cut teeth (not helical) mean no axial thrust is generated internally, but they do whine more under load; the 58 dB at 1 m no-load figure is a baseline — expect it to rise under torque.
Bearing life and the force limits
Service life is rated 30,000 hours at 100 rpm and 30 °C. At that speed and temperature, maximum axial force on the output shaft is 450 N, and maximum radial force (applied mid-shaft) is 340 N for the full 30,000-hour life. If you need higher loads — 600 N axial or 500 N radial — the bearing life drops to 10,000 hours at the same speed and temperature. The output shaft is C45 steel, the housing is black anodized aluminium, and the gearbox is lubricated for life, so no oil-change intervals to schedule.
Integration and environmental fit
The gearbox can be mounted in any position, which simplifies layout in a tight cabinet or on a moving gantry. The shaft output carries an IP54 rating — protected against dust ingress and splashing water, but not submersion or high-pressure washdown. The 60 mm diameter body is compact enough for servo-motor direct-mount applications where envelope is constrained.