700 Nm continuous, 1120 Nm peak — what the torque ratings mean for your axis
The GBX1600250701F delivers 700 Nm continuous output torque at 100 rpm and 30 °C ambient, with a peak capability of 1120 Nm under the same conditions. That 60 % overhead above continuous is what handles acceleration spikes and momentary overloads without tripping the machine cycle. The 25:1 reduction ratio in a single planetary stage means the input motor sees about 1/25th of the output torque reflected back — a 2.8 Nm motor at the input can drive the full 700 Nm continuous output. Straight-cut teeth keep efficiency at 94 %, but they transmit more vibration than helical gears; the 70 dB noise level at 1 m is typical for this tooth form under no-load.
Backlash, rigidity, and bearing life — the numbers that decide positioning performance
Maximum torsional backlash is 10 arcmin — that is the lost motion at the output when reversing direction. For a pick-and-place or indexing axis, that 10 arcmin translates to about 0.29 mm of linear error at a 100 mm arm radius; if your application needs better than that, this gearbox is not the right fit. Torsional rigidity of 41 N·m/arcmin tells you how much the gear train winds up under load — at 700 Nm continuous, the elastic wind-up is about 17 arcmin on top of the backlash. Service life is rated 30,000 hours at 100 rpm and 30 °C with the full continuous torque applied. The axial and radial force limits at that life point are 6000 N and 4200 N respectively, both measured with the force applied at mid-span on the output shaft. Push those numbers to 8000 N axial or 6000 N radial and the bearing life drops to 10,000 hours — the trade-off is explicit in the ratings.
Obsolete — sourcing reality for the GBX1600250701F
Schneider Electric lists this planetary gearbox as obsolete. A direct drop-in replacement from the original manufacturer does not exist. Stock is available through independent surplus and new-old-stock channels. Quantities are lot-specific — confirmed at RFQ against your BOM line. The black anodized aluminium housing, C45 steel shaft, and lifetime lubrication mean a stored unit that has not been run is functionally identical to one pulled from a production line.
Mounting and environmental limits
The 160 mm outer diameter housing is the envelope constraint — plan for that clearance in the machine frame. Shaft output seal is rated IP54, so it handles dust and splashing water but not washdown. Operating ambient range is -25 to 90 °C; the lifetime lubrication is good across that band without regreasing intervals.