Torque and duty cycle for a 80:1 reduction
The GBX1200801003F is a planetary gearbox with a 80:1 reduction ratio and straight-cut teeth, sized for applications needing a compact 120 mm diameter package. Continuous output torque is 260 N.m at 100 rpm and 30 °C ambient, with a maximum intermittent torque of 416 N.m under the same conditions — the margin between continuous and peak covers acceleration loads and short-duration overloads without oversizing the gearbox. Service life is rated at 30,000 hours at the continuous torque rating and 100 rpm, which is typical for a precision planetary stage in positioning or indexing duty. The gearbox is lubricated for life, so no maintenance interval for oil changes — just mount it and run it within the -25 to 90 °C operating range.
Backlash, rigidity, and load capacity
Maximum torsional backlash is 14 arc-minutes, placing this in the standard-precision class — adequate for conveyor drives, rotary tables, and general motion axes where repeatability is not sub-arcminute. Torsional rigidity is 12 N.m/arcmin, which means the gearbox wind-up under full continuous torque is about 22 arc-minutes; factor this into the servo tuning if the application is position-critical. Maximum radial force on the output shaft is 1500 N for the 30,000-hour life, applied at mid-span; axial force is 2100 N under the same duty. Both figures drop if the load cycle is continuous at full torque — the 100 rpm condition in the rating assumes the gearbox is not stalled. The shaft output seal is IP54, so the gearbox handles dust and splash but not washdown.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX1200801003F as obsolete. The gearbox is available through independent surplus and refurbishment channels; quantities are lot-specific and confirmed at RFQ. Efficiency is 94 % at rated load, and the noise level is 65 dB at 1 m under no-load conditions — both figures assume the gearbox is mounted on a rigid base and coupled with a misalignment-tolerant coupling. The housing is black anodized aluminium; the output shaft is C45 steel.