Planetary gearbox for precision motion — 40 mm frame, 4:1 reduction
The GBX0400041004F is a straight-tooth planetary gearbox in a 40 mm diameter housing, delivering a 4:1 reduction ratio. It is designed for servo or stepper motor output stages where compact axial length and low backlash matter — the maximum torsional backlash is 30 arc.min, which sets the positioning repeatability floor for index tables or pick-and-place axes. Continuous output torque is 15 N.m at 100 rpm and 30 °C; the maximum output torque reaches 24 N.m under the same conditions. The 94 % efficiency means roughly 6 % of the input power is lost as heat inside the housing — in a sealed aluminium body with no external fan, that thermal budget limits duty cycle in continuous high-load runs.
Sourcing reality — obsolete, quoted to order
Schneider Electric has marked the GBX0400041004F as obsolete. The part is available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. For a BOM freeze or a retrofit project, the key fit parameters to cross-check against a replacement candidate are the 40 mm housing diameter, the 4:1 ratio, the 15 N.m continuous torque at 100 rpm, and the 30 arc.min backlash. The shaft output seal is rated IP54 — the housing itself is not sealed, so the gearbox is suited for dry indoor environments or protected enclosures.
Mechanical and environmental limits
Rated service life is 30000 hours at 100 rpm and 30 °C — the limiting wear factors are the radial and axial loads on the output shaft. Maximum radial force Fr is 200 N at 100 rpm for 10000 hours, dropping to 160 N for the full 30000-hour life; axial force Fa follows the same profile. The gearbox is lubricated for life, so no maintenance oil changes are needed over that service window. Noise level is 55 dB at 1 m under no-load — audible but not intrusive in a typical machine hall; under load the gear mesh whine will rise, but the straight-tooth design is inherently noisier than helical at the same ratio.