Planetary gearbox, 40 mm frame, 9:1 reduction — obsolete, sourced per RFQ
The GBX0400090402D is a 40 mm-diameter planetary gearbox from Schneider Electric's GBX series, with straight-cut teeth and a 9:1 reduction ratio. It delivers 16.5 N.m continuous output torque and peaks at 26 N.m maximum, with 94 % efficiency across the operating range.
The continuous torque rating of 16.5 N.m is the figure that governs steady-state operation; the 26 N.m maximum output torque covers peak loads during acceleration or momentary overloads. Torsional rigidity is 1.1 N.m/arcmin — this tells you how much the output shaft twists under load, which matters for positioning accuracy in indexing or servo applications. Maximum torsional backlash is 35 arcmin — this is the angular play between input and output when direction reverses. For precision positioning, a lower-backlash gearbox would be needed; this unit suits applications where some lost motion is acceptable, such as conveyor drives or simple rotary indexing. Service life is rated at 30,000 hours at 100 rpm and 30 °C ambient. The axial and radial force limits are 200 N at 100 rpm for 10,000 hours, derating to 160 N for the full 30,000-hour life — these are the loads the output shaft bearings can sustain when the force is applied at mid-span.
Mounting, environment, and integration notes
The gearbox can be mounted in any position, which simplifies panel or machine layout. The housing is black anodized aluminium; the output shaft is C45 steel. Shaft output sealing is IP54 — this means it is protected against dust ingress and splashing water, but not pressurized washdown. Ambient operating range is -25 to 90 °C. The unit is lubricated for life — no maintenance refill schedule. Noise level is 55 dB at 1 m under no-load conditions, which is quiet enough for most indoor machinery without additional acoustic enclosures.