80 mm planetary gearbox — 3:1 reduction, 85 N.m continuous
The GBX0800030704F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, 80 mm housing diameter, with a 3:1 reduction ratio. It delivers 85 N.m continuous output torque at 100 rpm and 30 °C, with a maximum of 136 N.m at the same speed and temperature. Rated efficiency is 94 %, and the torsional backlash is 9 arc-min maximum — tight enough for positioning axes where lost motion matters.
Lifecycle — obsolete, sourced per RFQ
Schneider Electric lists the GBX0800030704F as obsolete. This gearbox is sourced through independent distribution channels.
Mechanical ratings and integration notes
The housing is black anodized aluminium, shaft material is C45 steel. Shaft output seal is rated IP54 — suitable for dry indoor environments where splash or dust ingress is limited. Service life is 30,000 hours at 100 rpm and 30 °C under continuous torque. The gearbox is lubricated for life — no maintenance re-greasing interval. Maximum radial force on the output shaft is 650 N at mid-span for the 30,000-hour life target; axial force is 900 N under the same duty. Ambient operating range is -25 to 90 °C.
Noise and efficiency — what the numbers mean
Noise level is 60 dB at 1 m, no-load — roughly the hum of a quiet office, not a screaming gear train. The 94 % efficiency means about 6 % of input power is lost as heat; for a 1 kW motor input that is 60 W of thermal load in the gearbox housing.