The GBX1200801004F: The 80:1 reduction ratio steps motor speed down by a factor of 80 while multiplying torque by roughly the same factor, minus the 94 % efficiency loss. At 100 rpm input, the continuous output torque is 260 N.m — that is the torque the gearbox can deliver indefinitely without overheating or accelerated wear. The maximum output torque of 416 N.m is the peak overload limit; exceeding it risks tooth fracture or bearing failure. Torsional backlash is 14 arc.min maximum, which matters for positioning accuracy in indexing or servo-follower applications — each reversal of load direction introduces that angular play before torque transfers. Torsional rigidity of 12 N.m/arcmin tells you how much the gearbox winds up under load; stiffer is better for resonance margin and positional repeatability.
Obsolete — sourcing the GBX1200801004F now
Schneider Electric lists this gearbox as obsolete. That means new production has stopped; the only supply channel is independent surplus and last-time-buy stock already in the field. We source the GBX1200801004F through our independent distribution network — quantities are lot-specific and confirmed at RFQ.
Mechanical limits and service life
The gearbox is rated for 30000 hours service life at 100 rpm output and 30 °C ambient. That is about 3.4 years of continuous running at that speed. The lubricant is sealed for life — no oil changes, but the life clock ticks faster at higher speeds or temperatures. Axial and radial force limits are given for the output shaft: 2100 N axial (Fa) and 1500 N radial (Fr) at 100 rpm for the full 30000-hour life. If your application imposes higher thrust or overhung loads (e.g., a belt drive or helical gear mesh), the bearing life drops — the datasheet shows a higher 10000-hour rating of 2800 N axial and 2000 N radial for short-duration peaks. The shaft output seal carries IP54 protection — splash-proof but not submersible. The housing is black anodized aluminium, the shaft is C45 steel, and the ambient operating range is -25 to 90 °C.