Planetary gearbox, 40 mm frame, 9:1 reduction
The GBX0400091003F is a straight-tooth planetary gearbox in a 40 mm diameter housing, delivering a 9:1 reduction ratio. It is designed for servo or stepper motor output stages where compact axial length and coaxial input-output matter. Continuous output torque is 16.5 N.m at 100 rpm and 30°C ambient; maximum intermittent torque reaches 26 N.m under the same conditions. The service life is rated 30000 hours at that continuous duty point, with the gearbox lubricated for life and requiring no maintenance interval. Efficiency is listed at 94 %, meaning about 6 % of input power is lost as heat in the gear mesh and bearings. For a 200 W servo motor, that is roughly 12 W of heat to manage inside the housing — negligible for most enclosed installations but worth noting if the gearbox is in a sealed, uncooled cavity.
Backlash, rigidity, and load limits for positioning
Maximum torsional backlash is 28 arcmin — this is standard-precision for a straight-tooth planetary stage, not a zero-backlash unit. If the application indexes bidirectionally under load, the lost motion at reversal will be at least 28 arcmin before the output shaft picks up the load. Torsional rigidity is 1.1 N·m/arcmin, meaning each arcminute of windup consumes 1.1 N·m of torque before the output moves. At the continuous torque of 16.5 N·m, the elastic windup is about 15 arcmin — combine that with the backlash and the total positioning uncertainty at the output flange approaches 43 arcmin under full continuous load. Maximum axial force on the output shaft is 200 N at 100 rpm for a 10000-hour target life, dropping to 160 N for the full 30000-hour rating. Radial force limits are identical — 200 N at mid-span for 10000 hours, 160 N for 30000 hours. These are the bearing life limits, not the shaft yield limits; overhung loads from pulleys or pinions must be calculated against these figures.
Environmental sealing and housing
The shaft output seal is rated IP54, meaning the gearbox is protected against dust ingress and splashing water at the output shaft — not submersible, but suitable for washdown-adjacent areas in food or packaging lines if the motor side is similarly sealed. Housing is black anodized aluminium (40 mm external diameter) with C 45 steel shaft material. Ambient operating range is -25°C to +90°C, covering most indoor industrial environments including unheated warehouses. Noise level is 55 dB at 1 m under no-load conditions — roughly the sound of a quiet office HVAC diffuser. Under load the gear mesh noise will rise, but the straight-tooth design is inherently noisier than helical; expect an increase of 5-10 dB under full torque depending on mounting stiffness.
Obsolete — sourcing through independent channels
Schneider Electric has marked the GBX0400091003F as obsolete. The part is available through independent surplus and broker distribution. Quantities are lot-specific, and availability is confirmed at the time of RFQ — there is no standing stock. Pricing is quoted per the BOM quantity and current market conditions. For a design-in or BOM freeze, a parametric replacement will need to match the 40 mm housing diameter, 9:1 ratio, 16.5 N·m continuous torque, and the C 45 shaft with IP54 output seal. No pin-compatible drop-in from Schneider's current GBX family is confirmed.