25:1 reduction, 110 N.m continuous — what the torque ratings mean for your axis
The GBX0800250701D is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for servo or stepper motor output stages where you need a 25:1 reduction ratio in a compact 80 mm diameter package. Continuous output torque is 110 N.m; the maximum intermittent rating hits 176 N.m — the higher figure governs acceleration peaks and emergency stops, while the continuous number sets the thermal limit for sustained positioning moves.
Backlash, rigidity, and service life — the numbers that govern precision and maintenance intervals
Maximum torsional backlash is 17 arc.min — this is a standard-precision grade, not a zero-backlash stage; if your application requires bidirectional positioning repeatability under 5 arc.min, this gearbox introduces more lost motion than a preloaded planetary. Torsional rigidity is 6.5 N.m/arcmin — the shaft wind-up under load is predictable, so the controller can compensate with a stiffness model if the servo loop bandwidth allows. Service life is 30,000 hours at 100 rpm and 30 °C ambient — the gearbox is lubricated for life, so no oil-change interval; the life limit is bearing and gear wear, not lubricant degradation.
Obsolete — sourcing reality for a discontinued GBX planetary
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. No pin-for-pin drop-in replacement exists from Schneider's current catalog — a different frame size or mounting interface will require mechanical adaptation. The IP54 rating on the shaft output means the gearbox tolerates dust and splashing water at the seal, but it is not washdown-rated — suitable for dry indoor machine-tool or conveyor environments, not food-processing or outdoor wash zones.