20:1 planetary reduction for servo duty
The GBX0800200852G is a planetary gearbox with straight teeth, 80 mm diameter, and a 20:1 reduction ratio. It delivers 120 N.m continuous output torque at 100 rpm and 30 °C, with a maximum of 192 N.m at the same speed and temperature. Rated efficiency is 94 %, which means the gearbox loses 6 % of the input power as heat at rated load. That heat stays in the black anodised aluminium housing, so the 30 000-hour service life at 100 rpm assumes the ambient stays within -25 to 90 °C.
Torque, life, and the load envelope
Continuous torque is 120 N.m at 100 rpm; the gearbox can handle 192 N.m peak at the same speed, but that reduces the service life from 30 000 hours to an unspecified shorter window. The 14 arc-min maximum torsional backlash and 6.5 N.m/arcmin torsional rigidity give a stiff response for position-loop applications. Radial and axial load limits are speed-dependent: at 100 rpm the shaft accepts 650 N radial force (mid-span) and 900 N axial force for the full 30 000-hour life. Push those to 950 N radial or 1200 N axial and the life drops to 10 000 hours. The shaft output seal is rated IP54, so it keeps out dust and splashing water but is not submersible. The gearbox is lubricated for life and can mount in any position, which simplifies integration into a machine frame.