Sizing the gearbox against the load it actually sees
The GBX1600161383D is a planetary gearbox in the Schneider Electric GBX series, with a 16:1 reduction ratio and a 160 mm frame, designed to mount in any position on the driven shaft. Continuous output torque is rated 800 N·m, with a maximum output torque of 1280 N·m — the 800 N·m figure is the duty rating that governs sizing for steady-state loads, while 1280 N·m is the peak the unit can transmit during acceleration or shock events. Service life is 30000 h at 100 rpm and 30 °C ambient; operating ambient is rated −25…90 °C, so higher shaft speeds or warmer cabinets pull the unit off that 30000 h envelope and into the shorter 10000 h curve.
Load ratings on the output shaft
Maximum radial force Fr is 4200 N at 100 rpm over 30000 h, rising to 6000 N over the 10000 h curve when the load is applied at mid-distance from the output shaft — the duty envelope, not the headline figure, drives coupling and pinion sizing. Maximum axial force Fa is 6000 N at 100 rpm across the 30000 h life, or 8000 N over the 10000 h curve; thrust loads from chain or belt drives must be checked against these limits, not against the torque rating. Shaft material is C 45, the housing is black anodized aluminium, and the gearbox ships lubricated for life — no oil port, no scheduled relube, so the maintenance plan can drop it from the lube schedule entirely.
Precision and behaviour under reversing duty
Torsional rigidity is 41 N·m/arcmin and maximum torsional backlash is 10 arc.min — backlash is the figure that sets positioning error on start/reverse, while rigidity governs twist under steady torque. Moment of inertia at the input is 7.47 g·cm², low enough that a servo drive on the input side does not need a separate inertia-matching stage for most mid-frame applications. Efficiency is 94 % and noise level is 70 dB at 1 m no-load — the 94 % figure is what flows back into motor sizing, since the gearbox is not 100 % transparent to the drive train.
Environment and integration into the cabinet
Shaft output sealing is IP54 — adequate for general industrial environments and IP54 cabinet-side mounting, but not for washdown; if the gearbox sits in a food-and-beverage zone or outdoor unprotected area, additional guarding is required. Mounting position is unrestricted, so the unit can be dropped into horizontal, vertical, or angled installations without an oil-fill variant change — the unit is lubricated for life and the seal geometry is the same regardless of orientation. The compatibility code GBX confirms it slots into the GBX family of planetary gearboxes, sharing the 160 mm frame footprint and input interface with other reductions in the same series.