Defining the GBX1600121382D in the GBX 160 mm line
The GBX1600121382D is a planetary gearbox in the Schneider Electric GBX series, with straight-cut gears housed in a 160 mm black anodized aluminium body built around a C45 steel shaft. Reduction ratio is fixed at 12:1 — the gearbox takes the input rpm and divides it by twelve, multiplying torque by the same factor minus losses. With 94% efficiency at rated duty, that loss budget is tight enough for servo sizing work where thermal accounting matters. Lubricated for life and rated for any mounting position, it ships ready to bolt onto a motor face or inline shaft without scheduled grease intervals.
Torque envelope and backlash — what 1280 N.m actually permits
Maximum output torque is 1280 N.m — the peak the gearbox can deliver in transient duty. Continuous output torque is held to 800 N.m, so steady-state loading must be planned against the lower figure or thermal accumulation will shorten bearing life. Maximum torsional backlash is 10 arc.min, paired with 41 N.m/arcmin torsional rigidity — adequate for point-to-point motion but not a precision-cutter choice. For servo applications the 10 arc.min dead-band is the number to work into the loop tuning, not the rated rigidity. Moment of inertia at the input is 12.37 g.cm² — low enough that the gearbox adds negligible reflected load to a mid-sized servo, so acceleration limits remain motor-side rather than gearbox-side.
Shaft loads vs service life — 30000 hours at 100 rpm
Service life is rated at 30000 hours at 100 rpm and 30 °C — the benchmark figure that the load tables are anchored to. Maximum radial force Fr on the output shaft is 4200 N when applied at mid-distance over that 30000-hour life, rising to 6000 N if the duty is capped at 10000 hours. Maximum axial force Fa scales the same way: 6000 N over the full life envelope, 8000 N on the shortened duty. That two-tier table is the one a mechanical designer actually uses: if the application runs slower than 100 rpm or accepts a shorter service window, the shaft can take proportionally more chain or belt pull without bearing fatigue becoming the failure mode.
Acoustic and thermal envelope for cabinet placement
Noise level is 70 dB measured at 1 m under no-load — straight-tooth gearboxes are louder than helical, and this figure tells the cabinet acoustician whether sound enclosure is needed when several units sit close together. The shaft seal is IP54 — protected against dust ingress and water spray, but not rated for hosedown or submerged service.