The GBX1200801002F is a planetary gearbox with straight teeth, 80:1 reduction ratio, and 120 mm external diameter — sized for servo or stepper motor output stages where compact axial length and high torque density are the constraints. Continuous output torque is 260 N.m at 100 rpm and 30 °C; maximum intermittent torque reaches 416 N.m under the same conditions — the spread between continuous and peak defines the duty cycle margin for acceleration and emergency stops. Efficiency is 94 % at rated load — the 6 % loss is mostly gear mesh friction and bearing drag, not heat buildup in the housing, because the black anodized aluminium body dissipates well in free air.
Sourcing reality — obsolete, quoted to order
Available through independent surplus and broker channels; quantities are lot-specific and confirmed at RFQ. Service life is 30,000 hours at 100 rpm and 30 °C — the gearbox is lubricated for life, so no field maintenance interval for oil changes.
Mechanical limits — axial and radial load capacity
Maximum axial force (Fa) on the output shaft is 2100 N for the full 30,000-hour life at 100 rpm, or 2800 N if the application accepts a shorter 10,000-hour service window. Maximum radial force (Fr) is 1500 N at mid-span of the output shaft for 30,000 hours, or 2000 N for 10,000 hours — the radial limit is the overhung load on the output bearing, not the gear teeth. Torsional rigidity is 12 N.m/arcmin — the stiffness matters for positioning accuracy in indexing or contouring applications where elastic windup under load must stay below the system's error budget.
Environmental and integration notes
Shaft output seal is rated IP54 — splash protection at the shaft exit, but the motor-side interface relies on the mating flange gasket; the gearbox itself is not submersible. Ambient operating range is -25 to 90 °C; the lubricant is factory-filled and sealed for life, so no viscosity derating is needed within that window. Noise level is 65 dB at 1 m, no-load — straight-tooth planetary gears are inherently noisier than helical, so this is a consideration for sound-sensitive environments like food processing or packaging lines.