40 mm planetary gearbox — 4:1 reduction, 15 N.m continuous
The GBX0400040402D is a 40 mm-diameter planetary gearbox from Schneider Electric's GBX series, with straight-cut teeth and a 4:1 reduction ratio. It delivers 15 N.m continuous output torque and peaks at 24 N.m maximum, making it sized for servo or stepper applications in the sub-24 N.m range. The housing is black anodized aluminium; the output shaft is C45 steel. Rated IP54 at the shaft output — the housing seals against dust and splash, but the gearbox is not submersible.
Torque, life, and the ratings that govern the application
Continuous torque is 15 N.m; maximum torque is 24 N.m. The service life is 30,000 hours at 100 rpm and 30 °C ambient — the life rating is tied to the input speed and temperature, not just runtime. At higher speeds or temperatures the service life shortens; the axial and radial force ratings also derate with speed and target life (200 N at 10,000 h vs 160 N at 30,000 h, both at 100 rpm and 30 °C). Efficiency is 96 % — typical for a single-stage planetary with straight teeth and grease lubrication. The noise level at no-load is 55 dB at 1 m, which is quiet enough for a lab or light assembly environment but not silent; the straight-cut teeth produce some gear whine under load.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX0400040402D as obsolete. No official successor part number is published in the lifecycle record. The gearbox is sourced through independent surplus and broker channels — quantities are confirmed at RFQ, and the supply is lot-specific. The gearbox is lubricated for life — no maintenance oil changes. Mounting position is any orientation, which simplifies integration into existing machine layouts.