The GBX0800800704F is a straight-tooth planetary gearbox with an 80:1 reduction ratio, meaning the output shaft turns once for every 80 input revolutions — a ratio suited to indexing tables, conveyor drives, or positioning axes where the motor runs at higher speed and the load needs torque multiplication. Continuous output torque is 120 N.m at 100 rpm, with a maximum intermittent rating of 192 N.m — the 120 N.m figure is the one to size against for duty cycles above 60% utilization; the 192 N.m ceiling covers acceleration peaks and occasional overloads within the 30000-hour service life at 30°C. Efficiency is 94%, which means about 6% of the input power is lost as heat inside the housing — for a 1 kW motor that is 60 W of thermal load the black anodized aluminium housing must dissipate; the housing material and colour are not cosmetic — anodized aluminium radiates better than painted steel in the same envelope.
Backlash, stiffness, and bearing loads — positioning accuracy constraints
Maximum torsional backlash is 16 arc.min — for a single-direction positioning axis this is the lost motion at reversal; for a bidirectional indexing application the 16 arc.min appears as a dead band the controller must compensate for or the mechanical system must preload against. Torsional rigidity is 6.3 N.m/arcmin — under the 120 N.m continuous load the output shaft twists about 19 arc.min from the no-load position, which adds to the backlash figure and must be budgeted in the total positioning error calculation. Maximum axial force on the output shaft is 1200 N at 100 rpm for a 10000-hour life, derating to 900 N for the full 30000-hour service life — if the application applies thrust (from a leadscrew or helical gear), the 900 N limit governs the bearing life; radial force is 650 N at mid-span for 30000 hours, rising to 950 N for a 10000-hour duty.
Obsolete — sourcing the GBX0800800704F through independent channels
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. No pin-compatible or dimensionally identical replacement is documented by Schneider — a substitution would require verifying the mounting flange, shaft diameter, and input interface against the existing installation. The gearbox is lubricated for life — no oil-change interval to plan for, which simplifies MRO spares storage but means the unit is sealed and cannot be re-greased if the service life is exceeded.