The GBX0400160554F is a 40 mm-diameter planetary gearbox with a 16:1 reduction ratio, delivering a maximum output torque of 32 Nm at 100 rpm and 30 °C ambient. Planetary construction means the input and output shafts are coaxial — the gearbox fits into the same envelope as the motor it couples to, provided the mounting interface matches the 40 mm register. The 94 % efficiency figure is the mechanical loss through the gear train at rated load; the remaining 6 % dissipates as heat, which the black anodised aluminium housing sheds through natural convection. For a continuous-duty application, the 30000-hour service life at 100 rpm sets the replacement interval — at higher speeds or loads, the life shortens non-linearly. The 28 arcmin maximum torsional backlash is the angular slop between input and output when the load reverses direction. For indexing or positioning axes, 28 arcmin is a loose tolerance — the gearbox is suited to conveyor drives, rotary tables, or speed-matching applications where absolute positioning accuracy is not the primary constraint. For servo-grade positioning, a backlash figure under 10 arcmin is typical; this unit is a motion-transmission gearbox, not a precision-indexing one.
Load capacity and derating at the shaft
The maximum radial force Fr is 200 N applied at mid-distance from the output shaft for a 10000-hour life at 30 °C, derating to 160 N for the full 30000-hour service life. Maximum axial force Fa follows the same pattern: 200 N for 10000 hours, 160 N for 30000 hours. These are the bearing loads — a belt-drive or chain-sprocket overhung load must stay within the Fr envelope, or the output bearing life drops below the stated service life. The C45 shaft material is a medium-carbon steel with good fatigue strength for these load levels. The lubricated-for-life specification eliminates periodic oil changes, provided the gearbox stays within the -25 to 90 °C operating range.
Lifecycle reality — obsolete, sourced through surplus
If the application can tolerate a different frame size or backlash class, a parametric search on 40 mm planetary gearboxes with 16:1 ratio and 32 Nm torque will yield functionally equivalent units from other manufacturers — but the mounting interface (pilot diameter, bolt pattern, keyway) must be verified against the existing motor and load coupling. The 1.1 N.m/arcmin torsional rigidity is the stiffness figure used to calculate windup under load; a replacement gearbox must match or exceed this to avoid changing the system's natural frequency.