Torque and life ratings — what they mean for the application
The GBX1200080703F is a straight-tooth planetary gearbox from the Schneider GBX series, 120 mm housing diameter, with an 8:1 reduction ratio. It delivers 120 N.m continuous output torque at 100 rpm and 30 °C, with a peak (maximum) output torque of 192 N.m under the same conditions — the continuous figure is the one to size against for sustained duty. Service life is rated at 30,000 hours at 100 rpm and 30 °C, and the gearbox is lubricated for life — no field regreasing interval, which simplifies MRO planning. Efficiency is listed at 94 %, typical for a straight-tooth planetary at this ratio; the noise level at 1 m, no-load is 65 dB — audible but not excessive for a 120 mm frame.
Shaft loads and backlash — integration constraints
Maximum axial force Fa is 2100 N at 100 rpm for the 30,000-hour life target, or 2800 N if the application accepts a shorter 10,000-hour life. Maximum radial force Fr, applied at mid-distance from the output shaft, is 1500 N for 30,000 hours or 2000 N for 10,000 hours. Torsional rigidity is 12 N.m/arcmin, and maximum torsional backlash is 8 arc.min — this is a precision class for positioning applications, not a high-backlash economy unit. Shaft output IP54 means the output shaft seal is protected against dust and splashing water, but the housing itself is not sealed — the black anodized aluminium housing and C45 steel shaft are standard for indoor industrial environments.
Obsolete — sourcing through independent channels
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. No pin-compatible direct replacement exists from Schneider — a functional replacement would require a different frame size or ratio, and likely a board or mounting adaptation.