What this gearbox delivers for a 9:1 motion axis
The GBX0600090551F is a 60 mm-diameter planetary gearbox from Schneider Electric's GBX series, with a 9:1 reduction ratio and straight-cut teeth. It's built for servo or stepper motor output stages where you need a compact inline speed reducer — think indexing tables, pick-and-place axes, or conveyor drives that run at moderate speeds and need positioning repeatability. Continuous output torque is 44 N.m (389.4 lbf.in) at 100 rpm, with a peak of 70 N.m (619.6 lbf.in) available for short-duration loads. The 94 % efficiency means you're not losing much heat in the gear mesh — important when the gearbox is mounted directly to a motor flange in a tight enclosure.
Torque, life, and the numbers that matter for fit
The continuous torque rating of 44 N.m at 100 rpm and 30 °C ambient is the number to design to for steady-state operation. The maximum torque of 70 N.m is for occasional peak loads — don't plan to run there continuously, or you'll shorten the 30,000-hour service life that's rated at 44 N.m and 100 rpm. Backlash is rated at 20 arc.min maximum — that's the angular play between input and output when you reverse direction. For positioning axes that need better than ~0.3° repeatability at the output, you'd want a lower-backlash gearbox, but for general motion this is typical for a straight-tooth planetary. Radial and axial load limits are given at two duty points: 340 N radial / 450 N axial for the full 30,000-hour life, and 500 N radial / 600 N axial if you only need 10,000 hours. The radial force is measured at mid-span on the output shaft — if your pulley or sprocket sits further out, derate accordingly. The shaft output seal is rated IP54, so it's splash-proof but not submersible — fine for dry indoor machinery, but keep washdown or outdoor mounting away from direct spray. The housing is black anodized aluminium; the shaft is C45 steel. The gearbox is lubricated for life, so no maintenance schedule for oil changes. Noise level is 58 dB at 1 m, no-load — that's quieter than a typical servo drive fan. In a machine with multiple axes, a few of these won't add noticeable acoustic clutter.
Obsolete — sourcing reality for this GBX gearbox
Schneider Electric lists the GBX0600090551F as obsolete. That means the only supply channel is independent surplus or broker stock — the part is not in active factory production. If you're planning a new design, look at current Schneider planetary gearbox families (GBX remains the series prefix, but check the active order codes for 60 mm, 9:1, similar torque).