Obsolete — sourcing through independent channels
The GBX1200800553F: Buyers should confirm mechanical fit (120 mm diameter, 80:1 ratio, shaft dimensions) against their existing installation before committing to a surplus unit.
Torque capacity and duty cycle — 260 N.m continuous, 416 N.m peak
Rated for 260 N.m continuous output torque at 100 rpm and 30 °C ambient — this is the sustained load the gearbox can carry through its 30,000-hour service life. The maximum output torque reaches 416 N.m under the same conditions, covering peak loads during acceleration or momentary overloads. The 80:1 reduction ratio with straight-cut teeth delivers a compact, single-stage planetary reduction. Torsional rigidity is 12 N.m/arcmin, meaning the gearbox resists wind-up under load — relevant for positioning accuracy in indexing or servo-follower applications.
Mechanical load ratings — axial and radial force limits
Maximum axial force (Fa) on the output shaft is 2100 N for the full 30,000-hour service life at 100 rpm, or 2800 N if the application accepts a reduced 10,000-hour life. Radial force (Fr) at mid-span on the output shaft is 1500 N for 30,000 hours, rising to 2000 N for 10,000 hours. These limits are specified at 100 rpm and 30 °C — overhung loads from belt drives, chain sprockets, or pinions must be calculated against these figures. Exceeding them reduces bearing and gear life below the rated 30,000-hour envelope.
Environmental sealing and lubrication
Shaft output sealing is rated IP54 — protection against dust ingress and splashing water from any direction. The housing is black anodized aluminium, the shaft is C45 carbon steel. The gearbox is lubricated for life, eliminating the need for periodic oil changes in the field. Noise level is specified at 65 dB measured at 1 m under no-load conditions — straight-tooth planetary gears are inherently noisier than helical designs, so this figure is a baseline for acoustic assessment in the application.