Planetary gearbox, 5:1 reduction — obsolete, sourced to order
The GBX1600051004F is a Schneider Electric planetary gearbox with a 5:1 reduction ratio, straight teeth, and a 160 mm outer diameter. It delivers 450 N.m continuous output torque at 100 rpm and 30 °C, with a maximum of 720 N.m under the same conditions.
The 450 N.m continuous rating at 100 rpm sets the thermal limit for sustained duty — stay under this for a 30,000-hour service life at 30 °C ambient. The 720 N.m maximum output torque covers peak loads like acceleration or momentary overloads, but don't run it there continuously. Maximum torsional backlash is 6 arcmin — that's the angular play between input and output when direction reverses. For indexing or positioning applications, that slop might matter; for constant-rotation conveyor drives, it won't. Torsional rigidity is 38 N.m/arcmin, meaning each 38 N.m of torque twists the output shaft by one arcminute. That stiffness figure tells you how much windup you get under load — useful if you're sizing for servo-like precision.
Shaft loads and environmental limits
Maximum axial force (Fa) is 6000 N for the full 30,000-hour life at 100 rpm, or 8000 N if you accept a shorter 10,000-hour life. Radial force (Fr) follows the same pattern: 4200 N for 30,000 hours, 6000 N for 10,000 hours — both measured at mid-distance on the output shaft. The shaft output seal carries an IP54 rating — splash-proof but not washdown-rated. Ambient operating range is -25 to 90 °C, and the gearbox ships lubricated for life, so no field greasing is needed. Noise level is 70 dB at 1 m, no-load — that's about the hum of a quiet office printer, not a screaming industrial gearbox. The 94 % efficiency means 6 % of input power turns into heat inside the housing; at 450 N.m output, that's manageable in the anodized aluminium body.