60:1 reduction, 260 N.m continuous — what the torque ratings actually mean
The GBX1200601003F is a 120 mm-diameter planetary gearbox with a 60:1 reduction ratio and straight-cut teeth. The continuous output torque is 260 N.m at 100 rpm and 30 °C — that is the figure to size against, not the 416 N.m maximum, which is a short-duration peak for acceleration or emergency stop events. Rated service life is 30,000 hours at 100 rpm and 30 °C. The gearbox is lubricated for life, so no maintenance oil changes — fit it and forget it until the service hour counter hits the limit.
Load limits — axial, radial, and torsional rigidity
Maximum axial force on the output shaft is 2100 N for the full 30,000-hour service life, or 2800 N if you accept a 10,000-hour life. Maximum radial force, applied at mid-length on the output shaft, is 1500 N for 30,000 hours or 2000 N for 10,000 hours. These are the hard limits for overhung loads like belt drives or pinions. Torsional rigidity is 12 N.m/arcmin — the shaft wind-up under load. With a maximum backlash of 14 arcmin, this gearbox suits indexing or positioning where absolute accuracy is not the primary spec, but repeatability is adequate for conveyor drives, rotary tables, or general motion axes.
Construction and environment
Housing is black anodized aluminium, 120 mm outer diameter. The output shaft is C45 steel. The shaft output seal is rated IP54 — splash-proof from the shaft side, but the gearbox body itself is not sealed for washdown; mount it in a cabinet or under a cover if the environment is wet. Noise level at 1 m, no-load, is 65 dB — roughly conversational speech volume; no special enclosure needed for acoustic compliance in most industrial settings. Efficiency is 94 % at rated load. The 6 % loss is heat dissipated through the aluminium housing — at 260 N.m and 100 rpm that is about 160 W of thermal load to manage in the enclosure.
Obsolete — sourcing through independent channels
Schneider Electric lists this gearbox as obsolete. The GBX1200601003F is available through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ. There is no direct form-fit-function replacement from Schneider; a substitution would require re-engineering the mounting and coupling interface. For a line-down situation, the 60:1 ratio, 120 mm flange diameter, and 260 N.m continuous torque are the critical fit parameters to match against any proposed alternative. Confirm the input shaft size and keyway dimensions against your motor before committing to a swap.