20:1 planetary gearbox for servo positioning
The GBX0800201002F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for servo motor output stages where a 20:1 reduction and 120 N.m continuous torque are needed. Rated for 1699.3 lbf.in (192 N.m) maximum output torque at 100 rpm and 86 °F (30 °C), with a continuous duty rating of 1062.09 lbf.in (120 N.m) under the same conditions — the continuous figure is the one to size against for sustained operation.
Load ratings and service life at 100 rpm
Service life is 30000 h at 100 rpm and 30 °C ambient — the gearbox is lubricated for life, so no oil-change interval to schedule. Maximum axial force (Fa) is 1200 N for a 10000-hour life at 30 °C, derating to 900 N for the full 30000-hour target. Maximum radial force (Fr) applied at mid-distance on the output shaft is 950 N for 10000 hours or 650 N for 30000 hours at 30 °C. Torsional rigidity is 6.5 N.m/arcmin, and maximum torsional backlash is 14 arcmin — the backlash figure governs positioning repeatability in reversing or indexing applications.
Environmental and mechanical specs
The housing is black anodized aluminium with an external diameter of 3.1 in (80 mm). Shaft material is C45 steel. Ambient operating temperature range is -13 to 194 °F (-25 to 90 °C). Shaft output protection is IP54, meaning the output seal resists dust ingress and splashing water — suitable for washdown-adjacent areas but not direct spray. Noise level is 60 dB at 1 m, no-load. Efficiency is 94 %, typical for a single-stage planetary with straight teeth at this ratio.
Sourcing an obsolete gearbox
Sourced through independent distribution channels; quantities and condition confirmed at RFQ.