32:1 planetary — torque and duty cycle
The GBX1200320552F is a planetary gearbox with a 32:1 reduction ratio and straight teeth, sized for applications needing high torque density in a compact 120 mm diameter package. Continuous output torque is 260 N.m at 100 rpm and 30 °C, with a maximum of 416 N.m for intermittent peaks — the continuous figure governs the steady-state load, not the peak. Efficiency is listed at 94 %, meaning roughly 6 % of input power is lost as heat through the gear mesh and bearing friction — this matters for thermal management in enclosed cabinets. Noise level is 65 dB at 1 m under no-load conditions; expect a few dB higher under full load, but the straight-tooth design is inherently louder than helical gears at the same ratio.
Mechanical limits and service life
Rated service life is 30,000 hours at 100 rpm and 30 °C — at higher speeds or ambient temperatures the life derates proportionally. The gearbox is lubricated for life, so no field greasing is required. Maximum axial force on the output shaft is 2100 N for the full 30,000-hour life, rising to 2800 N if you accept a shorter 10,000-hour life at the same speed. Radial force limits are 1500 N (30k h) and 2000 N (10k h), applied at mid-span of the shaft. Shaft output protection is IP54 — suitable for dry indoor environments but not washdown; the seal keeps dust and light splash out but won't survive direct hose spray. Torsional rigidity is 13 N.m/arcmin, and maximum backlash is 12 arc.min — this is a standard-precision gearbox, not a zero-backlash unit for servo positioning loops.