Planetary gearbox, 120 mm frame, 100:1 reduction
The Schneider Electric GBX1201001004F is a straight-tooth planetary gearbox in the GBX series, 120 mm external diameter, delivering a 100:1 reduction ratio. The 260 N.m continuous output torque at 100 rpm and 416 N.m maximum output torque at the same speed define the load envelope for servo or stepper motor indexing applications. Rated 94% mechanical efficiency means about 6% of input power is lost as heat in the gear mesh — typical for a single-stage planetary with straight teeth. The 30000-hour service life at 100 rpm and 30°C is the L10 bearing life under rated load; running at higher speed or ambient derates that figure.
Load ratings and application limits
Maximum axial force Fa is 2100 N at 100 rpm for the 30000-hour life target, or 2800 N if you accept a 10000-hour service life. Maximum radial force Fr at mid-span on the output shaft is 1500 N for the longer life, 2000 N for the shorter. These are the overhung load limits — a belt drive or pinion pushing past these numbers shortens bearing life fast. Torsional rigidity is 12 N.m/arcmin, meaning 12 N.m of torque twists the output shaft one arc-minute relative to the input. For positioning applications, the 14 arc-min maximum torsional backlash is the lost motion when reversing direction — a standard-precision planetary, not a zero-backlash unit. Noise level is 65 dB at 1 m, no-load — quiet enough for a machine-tool environment but expect a few dB more under full load as gear mesh noise increases with torque. Shaft output IP54 means the output seal resists splashing water and dust ingress — fine for a dry industrial enclosure, but not rated for washdown or outdoor exposure. Operating ambient range is -25 to 90°C, covering most heated or unheated plant-floor conditions.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX1201001004F as obsolete. This gearbox is available through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ time.