Planetary gearbox for precision motion
The Schneider Electric GBX1200041082D is a planetary gearbox with straight teeth, 120 mm external diameter, and a 4:1 reduction ratio. It delivers 155 N.m continuous output torque and peaks at 248 N.m maximum, with a torsional rigidity of 12 N.m/arcmin. Rated efficiency hits 96 %, meaning the power loss through the gear train stays under 4 % — a meaningful number when sizing the upstream motor for a continuous-duty conveyor or indexing table.
Torque, backlash, and service life
Maximum torsional backlash is 8 arc.min — this is the angular play at the output shaft under reversing load. For positioning applications that need better than 0.5° repeatability, that figure sets the floor on achievable accuracy without a secondary encoder. Service life is rated 30,000 hours at 100 rpm and 30 °C ambient. The gearbox is lubricated for life, so no maintenance oil changes are needed over that window. Maximum axial force Fa is 2100 N at 100 rpm for the 30,000-hour life target, and 2800 N if you accept a 10,000-hour service life. Radial force Fr at mid-shaft is 1500 N for the longer life, 2000 N for the shorter. These limits govern overhung load capacity from pulleys or sprockets.
Mounting and environmental fit
The housing is black anodized aluminium; shaft material is C 45 steel. IP54 at the shaft output means it handles dust and splashing water — fine for a dry indoor machine environment but not washdown. Mounting position is any position, which simplifies layout in tight machine frames. Ambient operating range is -25 to 90 °C. Noise level is 65 dB at 1 m, no-load — roughly the hum of a quiet office printer. The straight-tooth design is inherently noisier than helical, but this figure is within spec for most industrial enclosures.
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