Planetary gearbox, 80 mm frame, 20:1 reduction
The GBX0800200551F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, with an 80 mm outer diameter housing and a 20:1 reduction ratio. Continuous output torque is 120 N.m at 100 rpm and 30 °C ambient; maximum intermittent torque reaches 192 N.m under the same conditions. Rated efficiency is 94 %, and the no-load noise level measures 60 dB at 1 m — quiet enough for most production-floor environments without an enclosure.
Torque, backlash, and service life at rated load
Torsional rigidity is 6.5 N.m/arcmin, and maximum torsional backlash is 14 arc.min — a standard-precision gearbox suited for positioning tasks where sub-arcmin repeatability is not required. Service life is 30,000 hours at 100 rpm and 30 °C when delivering continuous rated torque; the gearbox is lubricated for life and requires no maintenance interval. Maximum axial force on the output shaft is 1200 N for a 10,000-hour life, derated to 900 N for the full 30,000-hour target. Maximum radial force is 950 N at 10,000 hours or 650 N at 30,000 hours, both measured at mid-span on the output shaft.
Obsolete — sourced through independent channels
Schneider Electric lists the GBX0800200551F as obsolete. Available through independent surplus and broker channels.
Mounting and environmental fit
The housing is black anodized aluminium; the output shaft is C45 steel. Shaft output seal is rated IP54, meaning the gearbox resists dust ingress and splashing water at the shaft exit — suitable for dry indoor machine builds but not washdown environments. Ambient temperature range for operation is -25 to 90 °C, covering most industrial cabinet and machine-mounted conditions without derating at the low end.