4:1 planetary gearbox with 720 N.m peak output
Schneider Electric's GBX1600041383D is a planetary gearbox from the GBX series with a 160 mm external diameter and a 4:1 reduction ratio using straight-cut teeth, sized for servo-class drivetrains rather than open industrial gear drives (cites:). The headline mechanical envelope is 720 N.m of peak output torque (cites:) and 450 N.m continuous output torque (cites:), with a torsional rigidity of 38 N.m/arcmin (cites:) and torsional backlash capped at 6 arc.min (cites:) — the figures that decide whether it sits between a servo and a high-inertia load without a wind-up problem.
What the ratings actually deliver in a drivetrain
Efficiency is rated 96% (cites:), so a 720 N.m peak load dissipates roughly 4% of mechanical power as heat inside the housing — small enough that no external cooler is required under the duty the gearbox is specced for. Noise level at no-load is 70 dB at 1 m (cites:), which fits a packaging or assembly cell without pushing into hearing-protection zoning. Service life is 30000 h at 100 rpm and 30 °C (cites:); the moment of inertia figure of 7.78 g.cm² (cites:) tells the upstream servo how much reflected inertia it has to accelerate on each move, which matters more on indexing axes than on continuous conveyors. Output-shaft loading is rated as 6000 N maximum axial force and 4200 N maximum radial force when both are applied over the 30000 h service life at 100 rpm, with higher short-term figures quoted against a shorter life (cites:) — the dual-rating shape lets you oversize the load if a shorter maintenance interval is acceptable.
Lubrication, sealing and environment
The gearbox is lubricated for life — no grease nipples on the side of the housing, so the unit is a fit-and-forget item unless a downstream fault forces an early teardown (cites:). Output-shaft sealing is to IP54 (cites:), which keeps out splashing water and dust but does not survive full washdown; for brewery CIP or outdoor panels, look at a higher IP spec or a guard. Ambient operating range is -25 to 90 °C (cites:), the housing is black anodized aluminium with a black finish (cites:), and the output shaft is C45 medium-carbon steel (cites:). The unit can be mounted in any position (cites:), which is useful when retrofitting into a skid where the gearbox height is dictated by the machine frame rather than the catalog.