Planetary gearbox for precision motion — 60:1 reduction, 260 N.m continuous
The GBX1200600551F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, with a 120 mm outer diameter and a 60:1 reduction ratio. It delivers 260 N.m continuous output torque at 100 rpm and 30 °C, with a maximum of 416 N.m under the same conditions. Rated efficiency is 94 %, and noise at 1 m under no-load is 65 dB — figures that matter when the gearbox is integrated into a servo-driven indexing table or conveyor section where thermal and acoustic budgets are tight.
Lifecycle status — obsolete, sourced to order
Schneider Electric lists this gearbox as obsolete.
Mechanical ratings that govern fit
Service life is 30,000 hours at 100 rpm and 30 °C — the design target for continuous-duty indexing or positioning axes. Maximum axial force (Fa) is 2100 N for that 30,000-hour life, or 2800 N if you accept a 10,000-hour service window. Radial force (Fr) applied mid-shaft is 1500 N for 30,000 hours, 2000 N for 10,000 hours. Maximum torsional backlash is 14 arc.min, and torsional rigidity is 12 N.m/arcmin — these numbers define the positioning repeatability in a servo loop. The shaft output seal is rated IP54, adequate for dry indoor environments but not washdown. The housing is black anodized aluminium, shaft material is C45 steel, and the unit is lubricated for life — no maintenance schedule for oil changes.