9:1 planetary gearbox — 16.5 N.m and 94 % efficiency
The GBX0400091002F is a 40 mm-diameter planetary gearbox with a 9:1 reduction ratio, delivering 16.5 N.m continuous output torque at 100 rpm. The 94 % efficiency means about 6 % of the input power goes to heat — budget that into the motor sizing and thermal profile of the assembly. Straight-tooth gearing keeps the backlash at 28 arc.min maximum — fine for positioning axes where the load holds position under brake, but not for reversing servo applications that need the lower backlash of a helical or dual-planet stage.
Lifecycle and sourcing — obsolete, sourced per lot
Schneider Electric lists this gearbox as obsolete. The part is available through independent surplus and liquidation channels — quantities are lot-specific and confirmed at RFQ. For a BOM freeze or last-time-buy, the value is in the sort: a liquidation pallet may carry these alongside other GBX-series units. The 40 mm diameter and 9:1 ratio are the hard fit constraints — everything else (shaft keyway, mounting flange pattern) needs to be verified against the mating motor and load.
Load ratings and service life — what the numbers mean for fit
Rated for 30,000 hours at 100 rpm and 30 °C ambient. The axial and radial force limits drop from 200 N to 160 N if you push the service window to 30,000 hours — the bearing life is the constraint, not the gear teeth. At 100 rpm and 200 N radial force applied mid-shaft, the expected life is 10,000 hours. Shaft output is IP54 — fine for dry indoor environments but not washdown. The black anodized aluminium housing resists corrosion in normal industrial atmospheres. Lubricated for life means no oil-change interval to track. Noise level is 55 dB at 1 m, no-load — quiet enough for a lab or assembly cell but check the actual load spectrum; gear whine increases under torque. The C45 shaft material is standard for this class — hard enough for keyway loads but not case-hardened for abrasive environments.