Planetary gearbox for servo and positioning axes
The GBX1600320704F is a Schneider Electric planetary gearbox with a 160 mm housing diameter, straight-tooth gearing, and a 32:1 reduction ratio. It delivers a continuous output torque of 800 N.m (7080.6 lbf.in) at 100 rpm and 30 °C, with a maximum peak torque of 1280 N.m (11328.9 lbf.in) under the same conditions. Rated service life is 30000 hours at the continuous torque rating and 100 rpm — the design target for a machine-tool or packaging-line axis running a full shift. The gearbox is lubricated for life and requires no maintenance interval for oil changes.
Torque, backlash, and overhung load limits
Maximum torsional backlash is 10 arc.min — a standard precision grade for positioning axes that do not need zero-backlash (harmonic-drive) levels. The torsional rigidity is 41 N.m/arcmin, so the wind-up under full continuous torque is about 19.5 arcmin before the gear teeth deflect. Maximum axial force on the output shaft is 6000 N for the full 30000-hour life, or 8000 N if the application accepts a 10000-hour service life. Radial force limits are 4200 N (30000 h) and 6000 N (10000 h), measured at mid-span on the output shaft. These numbers govern the belt-pulley or chain-sprocket loads the output bearing can sustain. Efficiency is 94 % at rated load — typical for a single-stage planetary with straight teeth. Noise level is 70 dB at 1 m, no-load, which is moderate for a 160 mm-frame gearbox; the straight-tooth profile generates more whine than helical gearing at higher speeds.
Obsolete — sourcing through independent channels
Schneider Electric has marked the GBX1600320704F as obsolete. The gearbox is available through independent surplus and broker channels; quantities are confirmed at RFQ and are typically new-old-stock or pulled from overstocked distributor inventories. For a replacement in a new design, look for a 160 mm-frame planetary gearbox with a 32:1 ratio, 800 N.m continuous torque, and ≤10 arc.min backlash from any major manufacturer — the mounting flange and shaft dimensions will need to be verified against the existing motor and load interface. No pin-compatible direct substitute is documented.
Environmental and mechanical construction
Shaft output seal is rated IP54 — suitable for dry indoor environments with occasional dust or splash, but not for washdown. The housing is black anodized aluminium; the output shaft is C45 carbon steel. Ambient operating range is -25 to 90 °C (-13 to 194 °F). The gearbox external diameter is 160 mm (6.3 in). Single-unit packaging.