20:1 planetary reduction in a 40 mm package
The GBX0400201402F is a 40 mm-diameter planetary gearbox with a 20:1 reduction ratio, delivering 20 N.m continuous output torque at 100 rpm and 30 °C ambient. Rated efficiency is 94 %, meaning about 6 % of input power is lost as heat through the straight-tooth mesh — typical for this class of planetary stage.
Torque, life, and load limits
Maximum output torque reaches 32 N.m at 100 rpm and 30 °C, but the continuous rating is 20 N.m — the margin covers transient overloads without exceeding the 30,000-hour service life target. Axial and radial force limits are 200 N each for a 10,000-hour life at 100 rpm and 30 °C, dropping to 160 N for the full 30,000-hour rating — derate the applied load if the duty cycle extends beyond 10,000 hours. Torsional rigidity is 1.1 N.m/arcmin, and maximum torsional backlash is 28 arcmin — the gearbox is suited for positioning applications where moderate backlash is acceptable, not for precision indexing.
Lifecycle and sourcing — obsolete, quoted to order
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. No pin-compatible direct replacement exists from the original manufacturer — a different frame size or ratio may be required for new designs.
Integration notes for a 40 mm planetary stage
Shaft material is C45 carbon steel; the gearbox is lubricated for life, so no maintenance oil changes are needed over the 30,000-hour service interval. Noise level is 55 dB at 1 m, no-load — quiet enough for operator-adjacent machinery without acoustic enclosures.