Planetary gearbox for precision motion — 15:1 reduction, 700 N.m continuous
The GBX1600150704F is a 160 mm diameter planetary gearbox from Schneider Electric's GBX series, delivering a 15:1 reduction ratio with straight-cut teeth. It's rated for 700 N.m continuous output torque at 100 rpm and 30 °C, with a maximum intermittent torque of 1120 N.m under the same conditions. The 94 % efficiency figure means you lose only 6 % of input power to gear mesh friction — straight teeth typically trade a bit of smoothness for higher efficiency versus helical, and this unit's 70 dB noise level at 1 m under no-load confirms it's a workhorse, not a whisper-quiet servo gearhead.
Torque, backlash, and stiffness — the numbers that govern fit
Continuous torque is 700 N.m (6195.5 lbf.in) at 100 rpm, 30 °C ambient. The maximum output torque of 1120 N.m (9912.8 lbf.in) is available for intermittent peaks — useful for acceleration or momentary overloads, but sustained operation should stay below the continuous rating to avoid exceeding the 30000-hour service life target. Maximum torsional backlash is 10 arc.min — this is the lost motion at the output when reversing direction. For positioning applications that need tighter repeatability, a lower-backlash variant would be needed; for simple speed reduction or indexing where a few arc-minutes of play is acceptable, this fits. Torsional rigidity is 41 N.m/arcmin — this tells you how much the gearbox twists under load. At the continuous torque of 700 N.m, expect about 17 arc-minutes of windup (700 ÷ 41). That's elastic deflection, not backlash, and it's recoverable when the load is removed.
Shaft loads and environmental limits
Maximum axial force (Fa) on the output shaft is 6000 N for the full 30000-hour life at 100 rpm, or 8000 N if you accept a shorter 10000-hour life. Radial force (Fr) at mid-shaft is 4200 N for 30000 hours, 6000 N for 10000 hours. These are the limits for overhung loads like sprockets or pulleys — exceed them and bearing life drops fast. The output shaft is C45 steel, housing is black anodized aluminium. IP54 at the shaft output means it's protected against dust ingress and splashing water — fine for most industrial floors but not for washdown environments.
Lifecycle status — obsolete, sourced through independent channels
Schneider Electric lists the GBX1600150704F as obsolete. This means new units are no longer manufactured, and the only supply channel is independent surplus and broker inventory.