Planetary gearbox with 20:1 reduction and 20 N.m continuous torque
The Schneider Electric GBX0400200553F is a 40 mm diameter planetary gearbox with straight teeth, offering a 20:1 reduction ratio. It delivers 20 N.m continuous output torque at 100 rpm (32 N.m maximum) with 94% efficiency — a solid match for servo or stepper motor applications needing compact speed reduction in a panel or machine frame.
Torque, backlash, and service life — what the numbers mean for fit
The 20 N.m continuous torque rating at 100 rpm and 30 °C ambient is the figure to design to for sustained duty; the 32 N.m maximum output torque covers peak loads during acceleration or momentary overloads. Maximum torsional backlash is 28 arc.min — this is a standard-precision gearbox, not a zero-backlash unit, so it suits positioning applications where a few arc-minutes of lost motion is acceptable. Service life is 30,000 hours at 100 rpm and 30 °C, with the gearbox lubricated for life — no maintenance re-greasing interval. Torsional rigidity is 1.1 N.m/arcmin, giving a stiffness figure to check against the system's resonance frequency. Maximum axial force (Fa) is 200 N and maximum radial force (Fr) is 200 N, both at 100 rpm for 10,000 hours at 30 °C; derate to 160 N for the full 30,000-hour service life. The shaft output carries an IP54 degree of protection — suitable for dry indoor environments but not washdown. Noise level is 55 dB at 1 m, no-load — quiet enough for laboratory or light industrial settings without acoustic enclosures. The housing is black anodized aluminium, the shaft is C45 steel, and the operating ambient range spans -25 to 90 °C.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX0400200553F as obsolete. The gearbox is available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ.