Obsolete — sourcing reality for this 25:1 planetary gearbox
Schneider Electric has marked the GBX1600250702F as obsolete. This planetary gearbox is sourced through independent surplus and broker channels. Availability and pricing are confirmed per RFQ against the specific quantity — no blanket stock claim.
Mechanical architecture — straight-teeth planetary, 25:1 reduction
The GBX1600250702F is a straight-teeth planetary gearbox with a 25:1 reduction ratio, housed in a 160 mm diameter black anodized aluminium body. The output shaft is C45 medium-carbon steel. Maximum torsional backlash is 10 arc.min — this is the lost motion on load reversal, a key parameter for positioning accuracy in indexing or servo-follower applications. Torsional rigidity is 41 N.m/arcmin, which governs how much the gearbox winds up under load before transmitting torque to the output. Higher rigidity means less compliance in the drive train.
Torque and service life — the duty envelope
Continuous output torque is 700 N.m (6195.5 lbf.in) at 100 rpm and 30 °C ambient. Maximum output torque is 1120 N.m (9912.8 lbf.in) under the same conditions — the peak rating for intermittent overloads, not sustained duty. Service life is rated at 30000 hours at 100 rpm and 30 °C. The gearbox is lubricated for life — no oil changes or regreasing intervals to schedule. Efficiency is 94 %, meaning 6 % of input power is lost as heat inside the gearbox. That heat must be dissipated through the aluminium housing; the operating ambient range is -25 to 90 °C.
Overhung load capacity — axial and radial force limits
Maximum axial force Fa is 6000 N at 100 rpm for the full 30000-hour life, or 8000 N if the service life is reduced to 10000 hours. Radial force Fr is 4200 N at mid-span for 30000 hours, or 6000 N for 10000 hours. These limits define how much belt tension, gear mesh force, or cantilevered load the output bearings can sustain before life is shortened. The IP54 shaft output seal protects against dust and splash — suitable for washdown-adjacent areas but not pressurized spray.
Acoustic and environmental specs
Noise level is 70 dB at 1 m, no-load — a moderate acoustic signature for a 160 mm planetary gearbox. In a quiet control cabinet or clean room, this may be audible; in a typical production hall it blends into the background. The black anodized aluminium housing resists corrosion in humid or mildly aggressive atmospheres. The gearbox is not rated for submerged or high-pressure washdown — the IP54 shaft output seal is the environmental barrier.