Planetary gearbox, 80 mm frame, 9:1 reduction — now obsolete
The GBX0800090551F is a straight-tooth planetary gearbox in the 80 mm diameter frame, delivering a 9:1 reduction ratio. Continuous output torque is 130 N.m at 100 rpm, with a maximum intermittent rating of 208 N.m at the same speed — the torque ceiling for short-duration overloads or acceleration peaks. Efficiency is listed at 94 %, which is typical for a single-stage planetary of this ratio. Noise measures 60 dB at 1 m under no-load — quiet enough for indoor conveyor or packaging lines where operator exposure is a concern.
Load ratings and service life — what the numbers mean for fit
Rated service life is 30,000 hours at 100 rpm and 30 °C ambient — this is the L10 bearing life under continuous rated torque. The gearbox is lubricated for life, so no maintenance interval for oil changes; the sealed charge covers the full service window. Maximum axial force (Fa) on the output shaft is 1200 N for a 10,000-hour target, dropping to 900 N if you need the full 30,000-hour life. Radial force (Fr) applied at mid-span on the output shaft is 950 N for 10,000 hours, 650 N for 30,000 hours — these are the limits that govern overhung load from a pulley or sprocket. Torsional rigidity is 6.5 N.m/arcmin, and maximum torsional backlash is 14 arcmin — the angular play under reversing load. For positioning applications that need better than 14 arcmin repeatability, this gearbox will need a preloaded or low-backlash variant.
Sourcing reality — obsolete, quoted to order
Available through independent surplus and broker channels.