Planetary gearbox, 60 mm frame, 12:1 reduction
The GBX0600121402F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, 60 mm diameter, with a 12:1 reduction ratio. It delivers 44 N.m continuous output torque at 100 rpm and 30 °C ambient, with a maximum of 70 N.m for intermittent peaks. Rated efficiency is 94 %, and the gearbox is lubricated for life — no maintenance schedule for oil changes. Service life is 30,000 hours at rated load and 30 °C.
Load ratings and mechanical limits
Maximum torsional backlash is 20 arc.min — this is a standard-precision planetary, not a zero-backlash stage. For positioning applications requiring tighter repeatability, a preloaded or harmonic drive would be needed. Torsional rigidity is 2.5 N.m/arcmin, which means the output shaft twists about 0.4 arcmin per N.m of applied torque. This stiffness is adequate for indexing and conveyor drives but not for high-dynamic servo axes. Maximum axial force on the output shaft is 450 N for the full 30,000-hour life, or 600 N if you accept a shorter 10,000-hour life. Radial force limits are 340 N and 500 N respectively, measured at mid-shaft. The shaft output seal is rated IP54 — splash-proof but not washdown. The housing is black anodized aluminium, and the shaft material is C45 steel.
Obsolete — sourced through surplus channels
Schneider Electric lists the GBX0600121402F as obsolete. No direct successor part number is published. This gearbox is available through independent surplus and used-equipment channels, where it is typically pulled from decommissioned lines with honest hours. For a new-build BOM, a current-production planetary gearbox from the same frame size class (60 mm, 12:1, 44 N.m) would be the practical replacement — expect a different mounting flange and keyway dimensions, so a mechanical adaptation is likely.