160 mm frame, 40:1 reduction, 700 N.m continuous — what the ratings mean on the line
The GBX1600401083D is a 160 mm-diameter planetary gearbox with a 40:1 reduction ratio, delivering 700 N.m continuous output torque and peaking at 1120 N.m maximum. That 700 N.m continuous figure is the one to size against for steady-state conveyor, indexing, or positioning applications — the 1120 N.m maximum handles transient overloads during start-up or reversing, but the duty cycle on that peak needs to stay short. The straight-tooth planetary design gives 94 % efficiency, which means only 6 % of the input power is lost as heat through the gear mesh. For a servo or stepper motor feeding into this box, that efficiency keeps the thermal rise manageable and preserves the motor's torque margin at the output. Torsional backlash is rated at 10 arcmin maximum — that's the lost motion between input and output when reversing direction. For pick-and-place or positioning axes that need repeatable stops, this backlash figure tells you the angular error budget at the load before the controller compensates.
Load capacity, forces, and service life — what the numbers mean for mounting
The output shaft can handle 6000 N axial force (Fa) and 4200 N radial force (Fr) at 100 rpm for the full 30,000-hour service life at 30 °C. If you need higher loads for a shorter run, the box takes 8000 N axial and 6000 N radial for 10,000 hours at the same speed and temperature — useful for intermittent high-thrust applications like press feeds or clamping. Torsional rigidity is 41 N.m/arcmin — that's the stiffness of the gear train under load. A stiffer box means less wind-up between the motor and the load, which matters for servo loops where phase lag at the encoder translates to settling-time penalties. The housing is black anodized aluminium, the shaft is C45 steel, and the shaft output seal carries IP54 protection — splash-resistant but not submersible. Mount it in any position; the box is lubricated for life, so no oil-change intervals to schedule. Ambient operating range is -25 to 90 °C, which covers most indoor industrial environments including unheated warehouses. The 5.28 g.cm² moment of inertia on the input side is low enough that a small servo can accelerate the gear train without eating into the torque budget.
Active production — sourcing this gearbox for a BOM line
The 94 % efficiency and 10 arcmin backlash are the specs that confirm fit for precision motion axes; the 700 N.m continuous torque and 40:1 ratio match the speed-torque envelope of common servo and stepper motor outputs.