The GBX0800030842D is a straight-tooth planetary gearbox from the Schneider GBX series, 80 mm housing diameter, with a 3:1 reduction ratio. The continuous output torque is 85 N.m, with a maximum intermittent rating of 136 N.m — the continuous figure governs the duty cycle in a servo or stepper application; the peak number covers acceleration and emergency stops. Efficiency is listed at 96 %, which means about 4 % of the input power is lost as heat in the gear mesh and bearings. For a 1 kW motor, that's 40 W of thermal load the housing must dissipate — the black anodised aluminium body handles that in free air up to 90 °C ambient, but a confined panel or high-duty cycle may need forced ventilation. Noise level is 60 dB at 1 m, no-load — that's roughly the sound of a quiet office printer. Under load the straight-tooth mesh will be louder than helical; if acoustic constraints are tight, a helical or spiral-bevel box would be quieter, but this part's straight teeth give lower backlash and higher stiffness for positioning.
Mechanical limits — shaft loads, backlash, and service life
Maximum torsional backlash is 12 arc.min — that's the lost motion at the output shaft when reversing direction. For a pick-and-place or indexing axis, this sets the repeatability floor; a 12 arc.min gap at the output translates to about 0.14 mm of linear error on a 100 mm lever arm. If the application needs tighter positioning, a low-backlash or zero-backlash gearbox would be needed. Radial and axial force limits are given at two service-life points. At 100 rpm and 30 °C, the maximum radial force Fr is 650 N for a 30,000-hour life, or 950 N for a 10,000-hour life. Axial force Fa is 900 N at 30,000 hours, 1200 N at 10,000 hours. These are forces applied at mid-distance from the output shaft — a belt drive or overhung load that shifts the force closer to the bearing will reduce the allowable load. Service life is rated at 30,000 hours at 100 rpm and 30 °C. The gearbox is lubricated for life — no oil changes or regreasing intervals. The IP54 rating at the shaft output means it's protected against dust ingress and splashing water, but not against hose-down or immersion; the seal at the output shaft is the wet-end barrier.
Obsolete — sourcing through independent channels
Schneider Electric lists this gearbox as obsolete. The part is available through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ. No pin-compatible direct replacement exists from Schneider; a functional replacement would require checking the mounting flange, shaft diameter, and ratio against a current GBX or BSH series box. For volume or scheduled requirements, we can source against a blanket order.