Planetary gearbox, 80 mm frame, 100:1 reduction
The GBX0801000704F is a straight-tooth planetary gearbox in the 80 mm diameter frame, delivering a 100:1 reduction ratio. Continuous output torque is 120 N.m at 100 rpm, with a maximum intermittent torque of 192 N.m under the same conditions. Rated efficiency sits at 94 %, which means about 6 % of input power is lost as heat through the gear mesh — typical for a single-stage planetary with straight-cut teeth at this ratio.
Torque ratings and service life at 100 rpm
Continuous duty is 120 N.m at 100 rpm and 30 °C ambient, with a design service life of 30,000 hours under those conditions. The maximum intermittent torque of 192 N.m is available for short-duration peak loads, not sustained running. Torsional rigidity is 6.3 N.m/arcmin — this figure tells you how much the output shaft twists under load. For positioning applications, the 16 arcmin maximum backlash is the cumulative play through the gear train, measured at no load. Maximum axial force on the output shaft is 1200 N for a 10,000-hour life, dropping to 900 N for the full 30,000-hour rating. Radial force limits are 950 N (10,000 h) and 650 N (30,000 h), with the force applied at the midpoint of the output shaft.
Sourcing an obsolete planetary gearbox
This part is sourced through independent distribution channels. The gearbox is lubricated for life and sealed to IP54 at the shaft output, so it can be installed as a direct replacement on a decommissioned line or as a service spare.