Planetary gearbox, 5:1 reduction, 195 N.m continuous — now obsolete
The GBX1200050704F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, with a 120 mm housing diameter and a 5:1 reduction ratio. It delivers 195 N.m continuous output torque at 100 rpm and 30 °C, with a maximum of 312 N.m under the same conditions.
Continuous output torque of 195 N.m at 100 rpm and 30 °C is the rating that governs steady-state duty. The maximum output torque of 312 N.m at the same speed and temperature covers peak loads during acceleration or momentary overloads — but sustained operation above the continuous figure shortens the 30,000-hour service life. Torsional rigidity of 12 N.m/arcmin and maximum backlash of 8 arcmin define the positioning accuracy. For a 5:1 ratio, 8 arcmin at the output corresponds to roughly 1.6 arcmin reflected to the input — relevant for indexing or servo applications where cumulative error matters. The gearbox is lubricated for life, so no maintenance schedule for oil changes. Service life is 30,000 hours at 100 rpm and 30 °C — derate for higher speeds or ambient temperatures up to 90 °C.
Shaft loads and environmental sealing
Maximum axial force (Fa) is 2100 N at 100 rpm for the full 30,000-hour life, or 2800 N if you accept a shorter 10,000-hour service interval. Radial force (Fr) is 1500 N at mid-span on the output shaft for 30,000 hours, 2000 N for 10,000 hours. These are the limits for overhung loads from pulleys, sprockets, or couplings. Shaft output is IP54 — protected against dust ingress and splashing water. The housing is black anodized aluminium, and the shaft is C45 steel. Noise level is 65 dB at 1 m, no-load, which is typical for a straight-tooth planetary of this size.