The GBX0800800703F is a planetary gearbox with straight teeth, 80 mm housing diameter, and an 80:1 reduction ratio. That 80:1 ratio means the output shaft turns once for every eighty input revolutions — the speed step-down that lets a high-rpm servo or stepper motor drive a slow, high-torque axis. Continuous output torque is 120 N.m at 100 rpm, with a peak of 192 N.m for short-duration loads. Push past it and the service-life clock runs faster. Efficiency is listed at 94 %, which is typical for a single-stage planetary of this size. The 6 % loss shows up as heat in the housing — the black anodized aluminium body (80 mm diameter) acts as the heat sink, so mounting clearance around the gearbox matters for thermal management in a confined panel or enclosure.
Backlash, service life, and the limits that matter
Torsional backlash is 16 arc.min maximum — that is the lost motion between input and output when the direction reverses. For positioning axes that index back and forth, this figure sets the repeatability floor; a 16 arc.min window is acceptable for general indexing but too loose for precision contouring without compensation. Service life is rated 30000 hours at 100 rpm and 30 °C ambient, with the gearbox lubricated for life — no oil changes, no regreasing intervals. The axial and radial force limits scale with the target life: at 30000 hours the maximum axial force (Fa) is 900 N, dropping to 1200 N if you accept a 10000-hour service window. Same derating curve applies to radial force (Fr): 650 N at 30000 hours, 950 N at 10000 hours. Noise level is 60 dB at 1 m, no-load — about the hum of a quiet office. Under load the gear mesh whine rises, but straight-tooth planetary is inherently noisier than helical; if the application sits near an operator station, factor in the acoustic profile.
Obsolete — sourcing reality for the GBX0800800703F
Schneider Electric lists the GBX0800800703F as obsolete. Available through independent surplus and broker channels. Quantities are lot-specific and confirmed at RFQ; no stock-holding claim is made here. IP54 at the shaft output means the gearbox is splash-proof from the output side but not submersible. The ambient operating range is -25 to 90 °C — wide enough for unheated plant floors but not for washdown zones or outdoor service without additional enclosure protection.