Obsolete — sourcing through independent channels
Schneider Electric has classified the GBX1200040552F as obsolete per the product lifecycle record. No official successor or direct replacement is listed from the manufacturer. This gearbox is available through independent surplus and broker channels.
Planetary gearbox — 4:1 reduction in a 120 mm package
Rated for 248 N.m maximum output torque and 155 N.m continuous at 100 rpm and 30 °C ambient. The 94 % efficiency is respectable for a single-stage straight-tooth planetary — expect some thermal loss at sustained full load but the lubricated-for-life design eliminates maintenance intervals. Service life is 30,000 hours at the rated 100 rpm and 30 °C. The 8 arcmin maximum torsional backlash places it in a moderate-precision class — adequate for positioning applications that don't need zero-backlash performance.
Load ratings and mechanical limits
Maximum radial force Fr is 1500 N for the 30,000-hour life target, applied at mid-distance from the output shaft. The axial force Fa limit is 2100 N under the same duty cycle. Both figures can be increased for shorter service — 2000 N radial and 2800 N axial for a 10,000-hour life at 100 rpm. Torsional rigidity is 12 N.m/arcmin — the gearbox resists windup under load, which matters for positioning accuracy in indexing or servo-follower applications. The IP54 rating on the shaft output means it handles dust and splash but isn't rated for washdown. Operating ambient range spans -25 to 90 °C, so it works in unheated enclosures or near motor heat. Noise level at 65 dB at 1 m, no-load, is typical for a straight-tooth planetary — helical or spiral-bevel designs would run quieter, but this is a cost-optimized stage.