Planetary gearbox for servo positioning — 100:1 in a 120 mm frame
The GBX1201001403F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for servo or stepper-driven rotary indexing, positioning tables, and conveyor drives where a single-stage 100:1 reduction fits within a 120 mm diameter envelope. Rated 260 N.m continuous output torque at 100 rpm, with a peak capacity of 416 N.m for acceleration or shock loads — the 1.6x overload margin covers short-duration starts and stops without oversizing the motor. Efficiency is listed at 94 %, which means about 6 % of input power is lost as heat inside the housing — acceptable for most duty cycles, but continuous near-rated operation should account for thermal rise in the enclosure.
Load limits and backlash — what the numbers mean for fit
Maximum torsional backlash is 14 arc.min — this is standard precision, not low-backlash. For positioning error budgets, the 14 arc.min at the output translates to roughly 0.0084° of rotational play, which may be acceptable for general indexing but not for high-accuracy contouring or laser cutting. Torsional rigidity is 12 N.m/arcmin — the gearbox twists 1 arcmin for every 12 N.m of applied torque. This stiffness affects servo loop tuning; a lower rigidity number (stiffer) would allow higher gain settings without resonance. Maximum axial force on the output shaft is 2100 N for the rated 30000-hour life, and 2800 N for a reduced 10000-hour life. Radial force limits are 1500 N and 2000 N respectively, with the force applied at mid-distance from the output shaft. These set the overhung load budget for belt pulleys or chain sprockets. Service life is 30000 hours at 100 rpm and 30°C ambient — the gearbox is lubricated for life with grease, so no maintenance interval for oil changes. The IP54 rating at the shaft output means the seal resists dust and splashing water, suitable for dry indoor environments but not washdown.
Obsolete — sourcing through surplus channels
Schneider Electric has classified the GBX1201001403F as obsolete. No official successor or cross-reference is recorded from the manufacturer. This gearbox is available through independent surplus and broker channels. Quantities are lot-specific — confirmed at RFQ against your BOM line. No stock-holding claim is made; each order is sourced per request.