Planetary gearbox for precision motion — 12:1 reduction, 44 N.m continuous
The GBX0600121004F is a 60 mm-diameter planetary gearbox from Schneider Electric's GBX series, offering a 12:1 reduction ratio with straight-cut teeth. It delivers 44 N.m continuous output torque at 100 rpm and 30 °C, with a maximum intermittent torque of 70 N.m under the same conditions. Rated service life is 30,000 hours at 100 rpm and 30 °C, with the gearbox lubricated for life — no maintenance schedule for oil changes. The 94 % efficiency means only 6 % of input power is lost to friction and windage, which keeps thermal rise manageable in continuous-duty cycles.
Torque, backlash, and load ratings that govern the fit
Continuous output torque is 44 N.m (389.4 lbf.in) at 100 rpm and 30 °C; maximum output torque reaches 70 N.m (619.6 lbf.in) for intermittent peaks. The 20 arc.min maximum torsional backlash is typical for a commercial-grade planetary stage — acceptable for positioning where cumulative error across multiple rotations is not critical, but too loose for a zero-backlash servo axis. Maximum axial force (Fa) on the output shaft is 450 N for the full 30,000-hour life, or 600 N if you accept a 10,000-hour service life. Radial force (Fr) is 340 N at mid-shaft for 30,000 hours, or 500 N for 10,000 hours. These limits drop with speed — the ratings are quoted at 100 rpm; higher speeds reduce allowable overhung load. Torsional rigidity is 2.5 N.m/arcmin, meaning each Newton-metre of load twists the output shaft by 0.4 arcmin. For a positioning application, multiply the peak torque by this stiffness to estimate windup at the load.
Obsolete — sourced through independent channels
Schneider Electric lists the GBX0600121004F as obsolete. No official successor or cross-reference is recorded from the manufacturer. The part is available through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ. The gearbox carries a shaft output IP54 rating — protected against dust ingress and splashing water, but not submersion. Ambient operating range is -25 to 90 °C, which covers most indoor industrial environments but not freezer or high-temp washdown zones.