20:1 planetary reduction, 40 mm frame
The GBX0400200552F is a 40 mm-diameter planetary gearbox with a 20:1 reduction ratio and straight-tooth gearing. It delivers a continuous output torque of 20 N·m at 100 rpm and a maximum intermittent torque of 32 N·m at the same speed — sized for servo or stepper motor axes that need a fixed speed drop without a belt or pulley stage. Efficiency is listed at 94 %, which means about 6 % of the input power is lost as heat in the gear mesh and bearings — typical for a single-stage planetary. The 55 dB noise level at 1 m, no-load, puts it in the range of a quiet office printer; suitable for operator-adjacent packaging, assembly, or pick-and-place cells where acoustic emissions are a constraint.
Load capacity and bearing limits
Maximum axial force on the output shaft is 200 N at 100 rpm for a 10,000-hour life, derating to 160 N for the full 30,000-hour service life. Radial force follows the same pattern: 200 N at mid-shaft for 10,000 hours, 160 N for 30,000 hours. These limits govern the overhung load from a belt pulley or coupling — exceed them and the output bearing life drops below the rated 30,000 h. Torsional rigidity is 1.1 N·m/arcmin, and maximum torsional backlash is 28 arcmin. For indexing or positioning applications, that backlash figure sets the repeatability floor — a 28 arcmin lost motion at the output means the load position can vary by nearly half a degree before the gear train picks up. If the application needs tighter positioning, a lower-backlash gearbox (e.g. 10 arcmin or less) would be the correct choice. The gearbox is lubricated for life — no scheduled grease changes.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX0400200552F as obsolete. The part is available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. There is no pin-compatible direct replacement in the current GBX catalog — a substitution would require checking the mounting flange, shaft diameter, and overall length against the application envelope. The housing is black anodized aluminium; the output shaft is C45 steel. Shaft output seal is rated IP54 — splash-proof but not submersible. The unit ships as a single piece; no mounting accessories or mating hardware are included in the package.