80:1 planetary reduction, 120 N.m continuous — what the ratings mean
The GBX0800801001F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, with an 80 mm housing diameter and 80:1 reduction ratio. Continuous output torque is rated 120 N.m (1062.09 lbf.in) at 100 rpm and 30 °C — this is the figure that governs steady-state conveyor or indexing duty, not the higher 192 N.m maximum torque figure which is a short-term peak limit. Efficiency is listed at 94 %, meaning about 6 % of input power is lost as heat through the gear mesh. For a 1 kW input motor, that's 60 W of thermal dissipation inside the housing — the black anodized aluminium body and the IP54-rated shaft output seal handle that without external cooling in most panel-mount or machine-frame installations.
Lifecycle reality — obsolete, sourced through independent channels
Schneider Electric has marked the GBX0800801001F as obsolete. This part is available through independent surplus and broker channels — quantities are lot-specific and confirmed at the time of RFQ. No pin-compatible or footprint-equivalent direct replacement is listed by Schneider, so a BOM substitution would require re-evaluating the mounting interface and output shaft dimensions.
Service life and overhung load limits
Rated service life is 30,000 hours at 100 rpm and 30 °C with the continuous 120 N.m torque. The gearbox is lubricated for life — no oil changes or regreasing intervals in the field. Maximum radial force (Fr) at mid-span on the output shaft is 650 N for the full 30,000-hour target, or 950 N if you accept a 10,000-hour service life. Axial force (Fa) limits are 900 N for 30,000 hours and 1200 N for 10,000 hours. These are the numbers to check when coupling to a belt drive or a pinion that imposes overhung loads.
Backlash and torsional stiffness
Maximum torsional backlash is 16 arc.min — this is a standard-precision planetary stage, not a zero-backlash unit. If the application requires reversing loads with positional repeatability under 0.5° at the output, this gearbox may introduce more lost motion than a preloaded or helical-stage alternative. Torsional rigidity is 6.3 N.m/arcmin, which means the output shaft twists about 0.16 arcmin per N.m of applied torque — stiff enough for most positioning conveyors but not for servo-driven indexing tables.