Torque rating and mechanical fit for a 60 mm frame
This GBX0600030583D is a 60 mm planetary gearbox with straight-cut teeth, delivering a continuous output torque of 28 N.m and a maximum intermittent torque of 45 N.m — the 3:1 reduction ratio means the input motor sees one-third of that reflected torque, so the motor-side inertia match is the first check before coupling. Torsional backlash is 20 arc.min maximum, and torsional rigidity is 2.3 N.m/arcmin — for a positioning axis this tells you the windup under load; at 28 N.m continuous the angular deflection at the output is about 12 arc.min before the gear train loads up.
Environmental and mechanical limits for integration
Shaft material is C45 carbon steel; maximum radial force at mid-span is 340 N for the 30,000-hour service life at 100 rpm, and maximum axial force is 450 N under the same duty cycle — the 30,000-hour rating at 30 °C and 100 rpm is the declared L10 life, so derate for higher speed or temperature. The gearbox is lubricated for life with a moment of inertia of 0.135 g.cm² reflected to the input — a low-inertia choice for servo applications where acceleration torque dominates the duty cycle.