60:1 reduction, 260 N.m continuous — what the ratings mean
The GBX1200601403F is a planetary gearbox with a 60:1 reduction ratio — that means the output shaft turns once for every sixty input revolutions, multiplying input torque by roughly the same factor minus efficiency losses. Continuous output torque is rated 260 N.m at 100 rpm and 30 °C, with a maximum intermittent torque of 416 N.m under the same conditions. The 94 % efficiency figure is the ratio of output power to input power at rated load; the 6 % loss shows up as heat in the gear mesh and bearings.
Lifecycle reality — obsolete, sourced through independent channels
Schneider Electric lists this gearbox as obsolete. The part is available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ.
Mechanical limits that govern the application
Torsional rigidity is 12 N.m/arcmin — this tells you how much the output shaft twists under load. At the continuous torque of 260 N.m, the wind-up is about 22 arcminutes (260 ÷ 12). Maximum torsional backlash is 14 arcminutes, which is the lost motion when reversing direction; for positioning applications this sets the repeatability floor. The gearbox is rated for 30,000 hours service life at 100 rpm and 30 °C — at higher speeds or temperatures the life derates. Maximum axial force on the output shaft is 2100 N at 100 rpm for the 30,000-hour target; radial force is 1500 N applied at mid-span. Exceed these and the bearing life drops sharply.
Environmental and integration details
The shaft output seal is rated IP54 — splash-proof but not submersible. Ambient operating range is -25 to 90 °C. The housing is black anodised aluminium, 120 mm external diameter. Shaft material is C45 carbon steel. The gearbox is lubricated for life, so no maintenance oil changes are needed. Noise level is 65 dB at 1 m, no-load — add the load-dependent gear mesh noise in a real installation.