Planetary gearbox with a 25:1 single-stage ratio
The Schneider Electric GBX1600250843D is a planetary gearbox in the GBX series, with a 160 mm external diameter and a 25:1 reduction ratio on straight-cut teeth, lubricated for life and rated for mounting in any position. Efficiency on this gear train is 94 %, with a continuous output torque of 700 N.m and a maximum output torque of 1120 N.m — the maximum figure is the short-duration overload ceiling, while the 700 N.m figure is the duty the gearbox holds continuously without accelerated wear. Torsional backlash is held under 10 arc.min and torsional rigidity is 41 N.m/arcmin, so the unit is sized for positioning work where return error after a direction reversal matters more than raw throughput.
Service life and the load envelope at the output shaft
Service life is rated at 30,000 hours when run at 100 rpm and 30 °C ambient — that is the reference duty the radial and axial load figures are anchored to. Maximum radial force Fr is 4200 N at 100 rpm over the 30,000-hour life (6000 N over a 10,000-hour life), applied at mid-distance from the output shaft; maximum axial force Fa is 6000 N over the 30,000-hour life (8000 N over a 10,000-hour life) at the same speed and temperature. Moment of inertia at the input is 5.81 g.cm², low enough that adding the gearbox to a servo loop does not meaningfully extend the acceleration time constant — the inertia budget is governed by the driven load, not the reducer.
Environment, sealing, and the housing envelope
Operating ambient is -25 to 90 °C, with IP54 protection at the shaft output — dust-protected and splash-resistant, not a washdown-rated seal, so the unit belongs inside an enclosure or on a sheltered machine, not on open outdoor equipment.
Lifecycle and the buying path
Buyers arriving at the GBX1600250843D with a BOM line in hand are typically working from a quote against a confirmed quantity, since independent distribution sources to order with lead time and pricing confirmed at RFQ.