20:1 planetary reduction with 94% efficiency
The GBX0800200701D is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for applications needing a 20:1 speed reduction with a continuous torque capacity of 120 N.m and a peak overload capability of 192 N.m before mechanical failure. At 94% efficiency, the gearbox loses 6% of input power as heat — a consideration for thermal rise in a sealed, non-ventilated enclosure where the ambient temperature stays within the -25 to 90 °C operating range.
Torque, stiffness, and backlash limits
Continuous torque is 120 N.m; the maximum output torque of 192 N.m is the structural limit before tooth or bearing damage — not a duty-cycle rating. Torsional rigidity of 6.5 N.m/arcmin means the shaft twists 1 arcminute per 6.5 N.m of applied torque, which sets the positioning error under load for indexing or servo-follower applications. The output shaft carries a maximum radial force of 650 N at 100 rpm over the 30,000-hour L10 life, and 950 N for a 10,000-hour life. Axial thrust is limited to 1200 N at 100 rpm for 10,000 hours, or 900 N for the full 30,000-hour service life. Both forces assume the load is applied at mid-span of the output shaft.
Service life and lubrication
Rated service life is 30,000 hours at 100 rpm output speed and 30 °C ambient — the L10 bearing life under those conditions. The gearbox is lubricated for life with no regreasing interval, which simplifies maintenance but means the lubricant condition is sealed at the factory. The IP54 rating on the shaft output means the dynamic seal resists dust ingress and splashing water — suitable for dry indoor environments but not washdown or submerged service. The housing is black anodized aluminium; the shaft is C45 medium-carbon steel.
The gearbox can be mounted in any position — no oil-level orientation restrictions. The 80 mm external diameter and straight-tooth design mean the input and output shafts are coaxial, with the input typically coupled to a motor via a keyed shaft or bell housing. Moment of inertia reflected to the input is 0.44 g.cm² — low enough that servo tuning is not dominated by the gearbox inertia in most motor-gearbox pairings.
Sourcing and lifecycle status
No official successor or cross-reference is listed — this is the current production variant for the 80 mm, 20:1, 120 N.m configuration in the GBX straight-tooth planetary family.