The GBX0800400701F is a straight-tooth planetary gearbox in the GBX series, 80 mm diameter, with a 40:1 reduction ratio. That ratio multiplies motor torque by 40 and divides output speed by 40 — the continuous output torque is 110 N.m at 100 rpm, with a maximum of 176 N.m for peak loads. Backlash is 14 arc.min maximum — this is a standard-precision grade, not a zero-backlash unit. For positioning axes that reverse direction under load, that lost motion at the output needs to be accounted for in the servo tuning or mechanical budget. Torsional rigidity is 6.5 N.m/arcmin — the shaft wind-up under rated load is about 17 arcmin at 110 N.m, which adds to the total compliance in the axis. For high-stiffness applications like direct-drive gantries, that wind-up matters more than the backlash figure alone.
Load capacity and service life tradeoffs
Rated service life is 30,000 hours at 100 rpm and 30 °C ambient — that's about 3.4 years of continuous operation. The axial and radial force limits drop if you push past the 30,000-hour target: maximum axial force Fa is 1200 N for 10,000 hours but only 900 N for the full 30,000-hour life at the same speed and temperature. Maximum radial force Fr at mid-span on the output shaft is 950 N for 10,000 hours, derated to 650 N for the full 30,000-hour window. If the driven load applies a belt or chain tension that exceeds 650 N at the shaft midpoint, expect the bearing life to fall short of the gearbox rating. The gearbox is lubricated for life — no oil changes or regreasing intervals. That saves maintenance labor but means the unit is sealed; if the output shaft seal (IP54 rated) gets damaged in washdown, the lubricant loss is permanent.
Sourcing an obsolete planetary gearbox
Schneider Electric lists the GBX0800400701F as obsolete.