Planetary gearbox with 8:1 reduction and 450 N.m continuous torque
The GBX1600080703F is a planetary gearbox from Schneider Electric's GBX series, delivering a reduction ratio of 8:1 through straight-cut teeth in a 160 mm diameter black anodized aluminium housing. Continuous output torque is 450 N.m at 100 rpm (30 °C ambient), with a maximum peak of 720 N.m for transient overloads — the sustained rating is what governs the duty cycle on a conveyor or indexing table. Efficiency is 94 %, meaning 6 % of input power is lost as heat through the gear mesh; for a 5 kW motor input that's 300 W of thermal load the housing must sink.
Stiffness, backlash, and overhung load limits
Torsional rigidity is 38 N.m/arcmin — the shaft twists 1 arcminute for every 38 N.m of applied torque, which sets the windup error in a positioning system. Maximum torsional backlash is 6 arc.min, the angular play between input and output when reversing direction; this is the figure a motion-control engineer uses to budget lost motion in the mechanical train. Maximum axial force on the output shaft is 6000 N at 100 rpm for the 30000-hour service life, or 8000 N for a 10000-hour life — the lower figure is the conservative design-in value. Maximum radial force is 4200 N at 100 rpm for 30000 hours, rising to 6000 N for 10000 hours, both measured at the midpoint of the output shaft — belt-drive or chain-sprocket loads must stay within these limits to avoid bearing fatigue.
Service life, sealing, and maintenance
Rated service life is 30000 hours at 100 rpm and 30 °C ambient — about 3.4 years of continuous operation at that speed before the gearset reaches its wear limit. The gearbox is lubricated for life, so no oil-change intervals or breather maintenance are required; the sealed charge covers the gear mesh for the full service life. Shaft output sealing is IP54, meaning dust-protected and splash-resistant at the output seal — suitable for indoor industrial environments but not washdown or submerged service.
Sourcing reality — obsolete, sourced to order
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. The 94 % efficiency, 8:1 ratio, and 450 N.m continuous torque are the specs that confirm fit against the BOM line — verify the input flange pattern and output shaft dimensions against the mating motor and load before committing.