Sizing this 80:1 planetary reducer for a motion axis
The GBX0800801002F is a planetary gearbox with an 80:1 reduction ratio and straight teeth, delivering 120 N.m continuous output torque at 100 rpm and 30 °C ambient. Peak torque hits 192 N.m at the same speed and temperature — that 60% headroom above continuous covers acceleration and occasional overloads without tripping the drive. The 16 arc-min maximum torsional backlash means this is not a zero-backlash stage; budget it into the positioning budget if the downstream encoder or ballscrew does not compensate.
Torque, life, and the thermal envelope
Rated service life is 30,000 hours at 100 rpm and 30 °C — if the duty cycle keeps the output speed lower or the ambient cooler, the L10 life extends proportionally. The 94% efficiency means about 7.7 W heat loss at continuous rated torque and speed; the black anodised aluminium housing sinks that without forced cooling in a ventilated cabinet. Operating ambient spans -25 °C to 90 °C, but the torque ratings are quoted at 30 °C — derate above that per the gearbox manufacturer's curve.
Sourcing an obsolete GBX — what that means for the BOM
No direct pin-compatible replacement exists in the current Schneider GBX catalog — a new gearbox selection will require re-verifying the mounting flange, shaft dimensions, and backlash class.