The GBX0400201002F is a 40 mm-diameter planetary gearbox with a 20:1 reduction ratio and straight-cut teeth — a compact speed reducer for servo or stepper motor axes where positioning accuracy and low noise matter. Continuous output torque is 20 N.m at 100 rpm and 30 °C, with a maximum intermittent torque of 32 N.m at the same speed — the 20 N.m figure is the thermal limit for sustained duty, not the mechanical peak the gear train can survive. Efficiency is 94 % at rated load — typical for a single-stage planetary with oil lubrication; the 6 % loss shows up as heat in the housing, so the black anodised aluminium body (40 mm OD) acts as the heat sink. Noise level is 55 dB at 1 m, no-load — quiet enough for lab or packaging machinery near operators, but the straight-tooth profile means it will be louder under full torque than a helical planetary of the same size.
Lifecycle reality — obsolete, but the stock covers the runway
The service life is rated at 30,000 hours at 100 rpm and 30 °C, with the gearbox lubricated for life — no maintenance interval to track, just a calendar end-of-life based on the bearing and gear wear. For a machine that runs one shift (8 hours/day, 250 days/year), 30,000 hours is roughly 15 years of operation — this gearbox will outlast most production lines if the load stays within the continuous torque envelope.
Mounting and integration — what fits inside a 40 mm envelope
The gearbox external diameter is 40 mm — it mounts via the front flange or the output shaft bore, typical for direct coupling to a NEMA 23 or 24 frame motor. Shaft output is IP54 — protected against dust ingress and splashing water, but not washdown; suitable for dry indoor environments like conveyor drives, pick-and-place axes, or indexing tables. Maximum radial force (Fr) is 200 N at mid-shaft, 100 rpm, for a 10,000-hour life — derate to 160 N for the full 30,000-hour service life. Axial force (Fa) follows the same derating curve. Torsional rigidity is 1.1 N.m/arcmin — the shaft twist under load is low enough for most positioning applications, but the 28 arcmin maximum backlash means this is not a zero-backlash gearbox for precision indexing without a servo tune.