Lifecycle reality — obsolete, sourced through independent channels
The GBX0800120704F: Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ.
Planetary gearbox — 80 mm frame, 12:1 reduction
This is a planetary gearbox with straight teeth, 80 mm external diameter, and a 12:1 reduction ratio — the core speed reduction and torque multiplication step for servo or stepper motor applications in indexing, positioning, and conveyor drives. Rated for 120 N.m continuous output torque at 100 rpm, with a maximum intermittent torque of 192 N.m at the same speed — the peak figure handles acceleration and emergency stops, but the continuous rating governs sustained duty. Efficiency is 94 % at rated load — about 6 % of input power is lost as heat in the gear mesh and bearings, which matters for thermal management in a confined enclosure.
Backlash, stiffness, and service life — the precision specs
Maximum torsional backlash is 14 arc.min — this is the lost motion at the output shaft when reversing direction, a key parameter for positioning accuracy in pick-and-place or rotary indexing applications. For comparison, precision-grade planetary gearboxes typically run 5–10 arc.min; this sits at the standard commercial level. Torsional rigidity is 6.5 N.m/arcmin — the shaft twist under load. Stiffer gearboxes (higher N.m/arcmin) maintain better position holding under varying torque. Service life is rated at 30000 hours at 100 rpm and 30 °C ambient — roughly 3.4 years of continuous operation. The gearbox is lubricated for life, so no maintenance interval for oil changes.
Load limits — axial and radial force ratings
Maximum axial force (Fa) on the output shaft is 1200 N for a 10000-hour life at 30 °C, dropping to 900 N for the full 30000-hour rating — overhung pulley or sprocket loads must stay within these limits to avoid bearing fatigue. Maximum radial force (Fr) applied at mid-distance on the output shaft is 950 N for 10000-hour life, or 650 N for 30000-hour life — radial loads from belt drives or direct-coupled loads need to be checked against the lower figure for the rated service life.
Environmental and mechanical construction
Shaft output sealing is IP54 — protected against dust ingress and splashing water, suitable for indoor industrial environments but not washdown or outdoor exposure. Housing is black anodized aluminium; shaft material is C45 medium-carbon steel. Ambient operating range is -25 to 90 °C. Noise level is 60 dB at 1 m, no-load — comparable to a quiet office environment; actual noise under load will be higher depending on the motor and coupling.