Planetary gearbox with 20:1 reduction and 120 N.m continuous rating
The GBX0800201004F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, 80 mm outer diameter, designed for precision speed reduction and torque multiplication in servo and motion-control applications. With a 20:1 reduction ratio, it steps down input speed by a factor of 20 while multiplying torque by roughly the same factor, minus the 94% efficiency loss — meaning about 6% of the input power is lost as heat in the gear mesh. Continuous output torque is 120 N.m at 100 rpm and 30°C ambient; the gearbox can deliver up to 192 N.m peak under the same conditions, but the duty cycle must respect the thermal limits of the black anodized aluminium housing.
Backlash, service life, and mounting constraints
Maximum torsional backlash is 14 arcmin — this is a standard-precision grade, not a zero-backlash unit. If the application requires positioning repeatability under a few arcminutes, this gearbox introduces enough lost motion to affect final position holding in reversing drives. Rated service life is 30,000 hours at 100 rpm and 30°C, lubricated for life — no oil changes or regreasing intervals. The shaft output seal is rated IP54, so the gearbox handles dust and splash but not pressurized washdown or submersion. Maximum radial force on the output shaft is 650 N at mid-span for the full 30,000-hour life, or 950 N if you accept a 10,000-hour service interval. Axial force is limited to 1200 N for 10,000 hours or 900 N for 30,000 hours — overloading the bearings shortens life faster than the gear teeth wear.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX0800201004F as obsolete — no longer in active factory production. Available through independent surplus and broker channels. Quantities are lot-specific; each unit is inspected for runtime and condition before quoting. The 30,000-hour service life rating means a low-hours pull from a decommissioned line still has substantial remaining life for a new installation. No stock-holding claim; each procurement is a fresh cross-check against the surplus market.