GBX160 planetary class — 4:1 reduction in a 160 mm frame
The GBX1600041083D is a Schneider Electric GBX series planetary gearbox with a 160 mm external diameter and a 4:1 single-stage reduction, built around straight-cut gearing in a black anodized aluminium housing with a C 45 steel output shaft. It is dimensioned as a servo-pump / servo-motor inline reducer for motion-control axes — the planetary geometry gives low torsional backlash of 6 arc.min maximum and 38 N·m/arcmin torsional rigidity, which is the figure that determines how tightly the driven axis holds position under load steps.
Torque envelope — 450 N·m continuous, 720 N·m peak
Continuous output torque is 450 N·m, with a 720 N·m peak for acceleration and shock loads; the moment of inertia at the input is 7.78 g·cm², kept low so the reducer does not dominate the motor's acceleration budget on a servo axis. Shaft-side load ratings are time-dependent: maximum radial force is 4200 N at 100 rpm over the full 30000-hour service life, rising to 6000 N if the duty is capped at 10000 hours; the equivalent axial-force ceiling is 6000 N over 30000 hours or 8000 N over 10000 hours, both at 100 rpm and 30 °C. The unit is lubricated for life and rated for 30000 hours at 100 rpm and 30 °C, with an operating ambient of -25…90 °C — the service-life curve drops as ambient temperature and continuous torque climb, so the time-based load figures above only hold inside that envelope.
Acoustic and efficiency envelope — 96 % efficient, 70 dB at 1 m
Efficiency is 96 %, typical for a single-stage planetary with straight-cut teeth; noise level is 70 dB measured at 1 m under no-load, which is the figure to compare against an enclosure's ambient specification when the reducer sits inside a cabinet near operators. Mounting position is unrestricted, which simplifies integration on machine frames, gantries, and tracking axes where the gearbox orientation is dictated by the driven mechanism rather than the reducer itself.
Lifecycle — obsolete, no official successor on record
The MPN sits at current per the normalised spec, but the lifecycle entry flags the product as obsolete; no official L*-coded successor or second-source cross-reference is on the record, so a board-spin replacement is not available from Schneider without re-engineering the interface. In practice this means the unit is sourced through independent surplus and broker channels rather than factory-direct; quantity, condition (new-surplus vs refurbished), and traceability are lot-specific and confirmed only at quote time — for a line-down spare this is the normal posture, not an availability promise. Where the GBX1600041083D is specified into an active BOM, the procurement gate is the cross-reference question rather than the stock question: with no factory successor named, any alternative must be qualified against the 160 mm frame, 4:1 ratio, 450 N·m continuous torque, 6 arc.min backlash, and the IP54 shaft seal together.