Planetary gearbox for precision indexing
The GBX0800801404F is a straight-tooth planetary gearbox in an 80 mm diameter black anodized aluminium housing, delivering an 80:1 reduction ratio. This is the kind of compact reducer you spec into a servo-driven indexing table or a pick-and-place axis where the motor needs to run at efficient speed while the load turns slow. Continuous output torque is 120 N.m at 100 rpm and 30 °C ambient, with a maximum intermittent torque of 192 N.m under the same conditions. That 120 N.m continuous figure is the one to design your duty cycle around — the gearbox will run indefinitely at that load without exceeding its 30000-hour service life target.
Torque, backlash, and service life constraints
Torsional rigidity is 6.3 N.m/arcmin, and maximum torsional backlash is 16 arcmin. For a positioning application, that backlash number tells you the angular deadband at the output shaft before the load starts moving — budget it into your repeatability budget if the cycle includes direction reversals. Rated service life is 30000 hours at 100 rpm and 30 °C. The gearbox is lubricated for life, so no oil-change interval to schedule — fit it and forget it until the hour counter hits the replacement threshold. Maximum radial force on the output shaft is 650 N at mid-span for the full 30000-hour life, or 950 N if you accept a 10000-hour service window. Axial force limits are 1200 N for 10000 hours and 900 N for 30000 hours. These overhung-load limits are the ones that trip up a retrofit — if your pulley or sprocket overhangs the shaft, the effective radial load at the bearing must stay under these figures.
Efficiency and thermal envelope
Efficiency is listed at 94 %, which means about 6 % of the input power dissipates as heat inside the housing. For a 120 N.m continuous load at 100 rpm (roughly 1.26 kW output), the heat loss is about 80 W — the black anodized aluminium body sinks that to ambient without a fan, but the operating range of -25 to 90 °C ambient sets the thermal ceiling. Noise level is 60 dB at 1 m, no-load — about the hum of a quiet office printer. Under load the noise will rise, but the straight-tooth design is inherently noisier than helical; if acoustic specs are tight, factor in enclosure attenuation.
Sourcing an obsolete GBX gearbox
For a line-down situation or a critical-spare cabinet, the practical path is a cross-reference to a current planetary gearbox with the same 80 mm frame size, 80:1 ratio, and 120 N.m continuous torque rating. The shaft material is C45 steel and the output seal is IP54 — any replacement must match the shaft diameter and keyway dimensions to avoid a coupling rework.