Planetary gearbox for precision motion control
The Schneider Electric GBX1200161102G is a straight-tooth planetary gearbox in the GBX series, sized for servo and stepper motor applications that demand compact, high-torque density in a 120 mm diameter envelope. With a 16:1 reduction ratio and 260 N.m continuous output torque at 100 rpm, it handles indexing, positioning, and constant-speed conveyor drives where the load profile stays within the rated duty cycle.
Torque, backlash, and stiffness that define fit
Continuous output torque is 260 N.m at 100 rpm and 30 °C; peak intermittent torque reaches 416 N.m under the same conditions — the margin matters for acceleration transients and emergency stops that exceed the continuous ceiling for short periods. Maximum torsional backlash is 12 arcmin, and torsional rigidity is 13 N.m/arcmin — this combination tells you the gearbox returns predictable angular position under load, critical for pick-and-place or rotary indexing where cumulative error stacks across multiple moves. Rated service life is 30,000 hours at 100 rpm and 30 °C, lubricated for life with no maintenance interval — the gearbox is sealed at the factory, so the life figure is the replacement trigger, not a service reminder.
Load ratings and environmental limits
Maximum axial force Fa is 2100 N at 100 rpm for the full 30,000-hour life, or 2800 N if you accept a 10,000-hour service life — the trade-off lets you overshoot the bearing load for short-duration applications like vertical lifting where axial thrust peaks during acceleration. Maximum radial force Fr is 1500 N at 100 rpm for 30,000 hours, or 2000 N for 10,000 hours, measured at mid-distance from the output shaft — this governs belt-drive or overhung-load setups where the radial load vector is constant. Shaft output is rated IP54, meaning it resists dust ingress and splashing water — suitable for machine-tool enclosures and washdown-adjacent areas, but not for direct high-pressure spray or submersion.