Active production planetary stage, 3:1 reduction
The GBX1600031385D: The part is a Schneider Electric planetary gearbox from the GBX series, sized at Ø 160 mm with a 3:1 single-stage reduction and straight-cut gearing, current production per the manufacturer lifecycle record. A 96 % mechanical efficiency at this ratio is a normal figure for a single-stage planetary — the loss budget is set by the planet bearings and the seal drag, not the tooth mesh. The 70 dB no-load rating at 1 m is a straight-cut signature; integrators pairing it with a quiet servo drive should still plan acoustic treatment if the cabinet sits near operators.
Torque envelope and torsional behaviour
Continuous output torque is 400 N·m, with a maximum output torque of 640 N·m — the peak is the inertial or E-stop envelope the gearbox can absorb briefly, while 400 N·m is the thermal steady-state the bearings and grease will hold over the rated service life. Torsional rigidity is 38 N·m/arcmin, so shaft wind-up at peak torque stays under roughly 17 arcmin, which matters on high-response servo loops where the gearbox compliance shows up before the motor inertia does. Maximum torsional backlash is 6 arcmin — tight for a straight-cut planetary at this diameter and well inside the budget for most packaging, conveyor, and indexing axes where this 160 mm frame typically lands. The 12.14 g·cm² moment of inertia is small relative to the 400 N·m continuous rating, so acceleration behaviour is dominated by the driven load rather than the gearbox itself.
Shaft loading and service-life brackets
Maximum radial force at mid-distance from the output shaft is 4200 N over the 30000 h / 100 rpm / 30 °C service-life bracket, or 6000 N if the design lifetime is de-rated to 10000 h. Maximum axial force follows the same dual-curve logic — 6000 N at the 30000 h point and 8000 N at the 10000 h point. These are the figures that drive pulley, sprocket, or pinion placement: hanging a heavy overhung load at the end of the shaft instead of mid-span blows the radial budget fast.
Sourcing reality for the GBX1600031385D
Lifecycle status is recorded as Active, so this is a current-production line — the BOM line is safe to commit without a last-time-buy window. As an independent distribution desk sourcing through the Schneider channel and qualified surplus partners, this code is quoted against the RFQ with current pricing and lead time confirmed at quote time; volume breaks and project-lot quantities are scoped per order.