16:1 planetary, 260 N.m continuous — the torque-to-backlash tradeoff
The GBX1200161004F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized at 120 mm outer diameter with a 16:1 reduction ratio. It delivers 260 N.m continuous output torque at 100 rpm and 30 °C, with a maximum intermittent rating of 416 N.m under the same conditions. The 12 arcmin maximum torsional backlash and 13 N.m/arcmin torsional rigidity define the positioning repeatability — for indexing or servo applications where lost motion matters, this backlash figure is the spec that governs precision.
Efficiency, noise, and thermal envelope
Rated at 94 % efficiency, the gearbox loses 6 % of input power as heat — at 260 N.m output that's roughly 100 W thermal dissipation at rated speed, which the black anodized aluminium housing sinks without external cooling in most duty cycles. Noise level is 65 dB at 1 m under no-load conditions — audible but within typical machine-enclosure limits for a 120 mm planetary stage. The operating temperature range spans -25 to 90 °C, covering most indoor industrial environments.
Sourcing reality — obsolete, quoted per RFQ
Available through independent surplus and broker channels. Quantities are lot-specific — confirmed at RFQ against your BOM line. The unit ships lubricated for life with IP54 shaft-output protection, so it's ready for direct installation if the mating dimensions check out.
Shaft loading and mounting constraints
Maximum axial force Fa is 2100 N at 100 rpm for the 30,000-hour service life, or 2800 N for a 10,000-hour duty cycle. Radial force Fr at mid-span on the output shaft is 1500 N for the longer life target, 2000 N for the shorter. These limits drop with speed — the 100 rpm reference is the benchmark. Shaft material is C45 steel, housing is black anodized aluminium. The IP54 rating on the shaft output means it's splash-proof but not submersible — suitable for dry indoor locations with occasional coolant mist or washdown overspray.