The GBX1600200702F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for servo or stepper motor output stages where you need a 20:1 reduction in a compact 160 mm diameter package. Continuous output torque is 800 N.m at 100 rpm and 30 °C ambient — that is the rating you design the axis around, not the 1280 N.m maximum figure which is a short-term peak before the gearbox thermal limit kicks in. Maximum torsional backlash is 10 arc.min, which puts this in the standard-precision range — fine for general positioning and indexing, but if you need under 5 arc.min for a high-accuracy rotary table or a CNC axis, you would step up to the low-backlash variant in the same frame size. Rated service life is 30000 hours at 100 rpm and 30 °C — the gearbox is lubricated for life, so no oil-change intervals on the maintenance schedule.
Sourcing reality — obsolete, quoted to order
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ time.
Mechanical interface and environmental limits
The output shaft is C45 steel, and the housing is black anodized aluminium — the 160 mm diameter body gives you the mounting flange pattern for direct bolting to a machine frame or a motor adapter plate. Shaft output seal is rated IP54, so it handles dust and splashing water but is not rated for washdown — keep it out of direct hose spray. Ambient operating range is -25 to 90 °C, which covers most indoor industrial environments and some outdoor cabinet installations. Maximum axial force on the output shaft is 6000 N for the full 30000-hour life, or 8000 N if you accept a reduced 10000-hour life — the radial force limits follow the same pattern: 4200 N for 30000 hours, 6000 N for 10000 hours, with the radial load applied at mid-shaft. Torsional rigidity is 41 N.m/arcmin — this tells you how much the gearbox twists under load; at 800 N.m continuous torque the wind-up is about 19.5 arcmin, which you need to account for in the servo tuning if the application is stiffness-sensitive.
Efficiency and noise — what 94 % and 70 dB mean on the line
Efficiency is 94 % at rated load — about 6 % of the input power is lost as heat in the gear mesh and bearings, so at 800 N.m output the heat loss is roughly 50 W, which the aluminium housing dissipates without a fan in most installations. Noise level is 70 dB at 1 m, no-load — that is about the level of a vacuum cleaner running in the next room; in a production hall with background noise above 75 dB it will not be the loudest component on the line.