Rating envelope for a 25:1 planetary unit
The GBX1600251082D is a planetary gearbox in Schneider Electric's GBX family with a 25:1 reduction ratio and a Ø 160 mm frame, so it drops directly into the standard Lexium servo mounting interface in that series. Continuous output torque is 700 N.m and the maximum torque ceiling is 1120 N.m, which is the sizing number to use when calculating worst-case acceleration shocks rather than the steady-state figure. Torsional rigidity is listed at 41 N.m/arcmin and maximum torsional backlash is 10 arc.min, so positioning applications need to budget that backlash into the reversal error — at the output shaft that is roughly 0.058 mm of lost motion per metre of travel before closed-loop correction kicks in.
Shaft loads, seals, and the duty envelope
The maximum radial load is 4200 N over the 30000 h service life at mid-shaft and 6000 N over a 10000 h life — the lower figure is what governs if you actually run to the rated life at 100 rpm. Maximum axial force Fa is 6000 N over 30000 h and 8000 N over 10000 h, so a direct-coupled screw or heavy pulley needs to be checked against the 10000 h figure if the loading runs high. The shaft output is sealed to IP54, which keeps casual dust and drips out but is not a washdown rating — outdoor or food-grade duty needs an enclosure or a cover shield over the output seal. Operating ambient range is -25 to 90 °C and the unit is lubricated for life, so there is no scheduled oil change to roll into maintenance planning — the 30000 h figure is the practical overhaul interval at 100 rpm and 30 °C.
Efficiency, acoustics, and what they cost
Listed efficiency is 94 %, which for a planetary stage with straight-cut gearing sets a per-stage loss floor; from that figure plus the duty cycle the heat rejection into the cabinet can be sized rather than measured. Noise level is 70 dB at 1 m no-load, so at full load with the motor coupled the cabinet acoustic treatment needs to be designed around that baseline rather than the drive-only noise figure.
Sourcing posture for the BOM line
Mounting position is listed as any position, which matters for retrofit cabinets where the gearbox has to follow the existing shaft alignment rather than the preferred orientation.