12:1 planetary reduction in a 40 mm package
The GBX0400121401F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for applications needing a 12:1 reduction ratio in a compact 40 mm diameter envelope. Rated for 32 N.m maximum output torque at 100 rpm and 30 °C ambient, it delivers 20 N.m continuous under the same conditions — the continuous figure is the one to size against for sustained duty cycles. The 94 % efficiency rating means only 6 % of input power is lost to friction and windage at rated load — a meaningful advantage in battery-powered or thermally constrained assemblies where every watt counts.
Noise, life, and environmental limits
Noise output is 55 dB at 1 m under no-load — quiet enough for laboratory or office-adjacent equipment without an acoustic enclosure. Service life is rated at 30,000 hours at 100 rpm and 30 °C, with the gearbox lubricated for life — no maintenance access ports or regreasing intervals to schedule. Operating ambient range spans -25 to 90 °C, and the shaft output carries IP54 protection — splash-resistant but not submersible, so position the gearbox above any washdown spray path.
Sourcing an obsolete planetary gearbox
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ time.