What this gearbox delivers — 32:1 reduction, 260 N.m continuous
The GBX1200321404F is a straight-tooth planetary gearbox in a 120 mm diameter housing, delivering a 32:1 reduction ratio. Continuous output torque is 260 N.m at 100 rpm and 30 °C; maximum output torque reaches 416 N.m under the same conditions. Efficiency is listed at 94 %, and noise level at 65 dB measured 1 m away under no-load. The housing is black anodized aluminium; the output shaft is C45 steel.
Load ratings and service life — what drives the replacement interval
Rated service life is 30,000 hours at 100 rpm and 30 °C. Maximum axial force on the output shaft is 2100 N for the full 30,000-hour life, or 2800 N for a 10,000-hour duty cycle. Maximum radial force (applied at mid-distance from the shaft) is 1500 N for 30,000 hours, 2000 N for 10,000 hours. Torsional rigidity is 13 N.m/arcmin, and maximum torsional backlash is 12 arc.min. The gearbox is lubricated for life — no field re-greasing required. Shaft output sealing is IP54, suitable for indoor environments with dust and splash exposure.
Sourcing this obsolete gearbox — what to expect
Available through independent surplus and broker channels. No stock-holding claim is made — availability is verified at quote time.