160 mm planetary — 8:1 with 6 arc-min backlash
The GBX1600080701F is a 160 mm-diameter planetary gearbox from Schneider Electric's GBX series, with straight teeth and a reduction ratio of 8:1. Maximum torsional backlash is held to 6 arc-min, which keeps positioning repeatability tight for indexing or servo-driven axes.
Torque, life, and the limits that matter
Continuous output torque is 450 N.m at 100 rpm and 30 °C, with a maximum of 720 N.m under the same conditions. The gearbox is rated for 30,000 hours service life at those figures — lubricated for life, so no oil-change interval to schedule. Torsional rigidity is 38 N.m/arc-min, which tells you how much windup the gear train has under load. At 450 N.m continuous, the twist is roughly 12 arc-min — the 6 arc-min backlash is on top of that, so your lost motion budget is about 18 arc-min total at rated torque. Axial load capacity on the output shaft is 6000 N for the full 30,000-hour life, or 8000 N if you accept a shorter 10,000-hour window. Radial load (force applied at mid-shaft) is 4200 N for 30,000 hours, 6000 N for 10,000 hours. Overhung loads from pulleys or sprockets must stay within these envelopes — the bearing life is the constraint, not the shaft. Efficiency is listed at 94 % — the 6 % loss is mostly gear mesh friction and oil churning. For a 450 N.m output, that's about 28 N.m of input torque lost as heat, so the housing acts as the heat sink. Ambient operating range is -25 to 90 °C.
Construction and environmental sealing
Housing is black anodized aluminium, 160 mm outer diameter. Shaft material is C45 steel. The shaft output carries an IP54 rating — splash-proof from the shaft side, but the gearbox body itself is not sealed for washdown. Mount it with the breather (if any) oriented to avoid pooling water on the output seal. Noise at 1 m, no-load, is 70 dB — roughly the level of a conversation. Under load the gear mesh whine will rise, but the straight-tooth profile is inherently noisier than helical; if acoustic limits are tight, factor in enclosure damping.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX1600080701F as obsolete. The line is supported through independent surplus and broker channels — quantities are confirmed at RFQ, and the parts carry no factory warranty. For a BOM freeze or a line-down replacement, the 160 mm frame size and 8:1 ratio are the binding constraints; any substitute must match the input/output shaft dimensions and mounting pattern.