3:1 planetary stage — 94 % efficiency, 40 mm envelope
This GBX0400031003F is a 40 mm-diameter planetary gearbox with a 3:1 reduction ratio, straight-tooth gearing, and 94 % efficiency — the straight teeth trade a bit of noise for lower cost vs helical, and the efficiency figure tells you the thermal loss is low enough to skip forced cooling in most index-and-hold cycles. Maximum torsional backlash is 24 arcmin — a standard-grade figure for positioning where the load doesn't reverse under torque (pick-and-place, rotary indexing tables). Service life is 30,000 hours at 100 rpm and 30 °C, lubricated for life — no oil-change interval to schedule, but the life clock ticks faster above that speed or temperature.
Sourcing and lifecycle — obsolete, quoted to order
Sourced through independent distribution channels; quantities and condition (new-old-stock / pulls) confirmed at RFQ against your BOM line. No pin-compatible or bolt-in alternative is documented by Schneider — if you need a drop-in, the 40 mm flange and the 3:1 ratio are the dimensions to match against a current-series candidate.
Shaft loads and mounting — C 45 steel, black anodized housing
Maximum axial force is 200 N at 100 rpm for 10,000 hours at 30 °C, or 160 N for the full 30,000-hour life — same derating applies to radial force (200 N / 160 N, force applied at mid-span on the output shaft). Torsional rigidity is 1 N·m/arcmin — the wind-up under rated load is predictable enough for open-loop positioning, but a servo loop with encoder feedback would correct the residual compliance.