5:1 planetary — what the numbers mean for a motion axis
The GBX0800051401F is a straight-tooth planetary gearbox in an 80 mm diameter housing, giving a 5:1 reduction ratio. That ratio drops the motor speed by a factor of five and multiplies the torque by roughly the same — minus the 94 % efficiency loss, so you get about 4.7× the motor torque at the output shaft. Continuous output torque is 110 N.m at 100 rpm; the gearbox can handle 176 N.m peak at the same speed. The 9 arc-min maximum torsional backlash means this is a general-purpose positioning gearbox, not a zero-backlash stage for a precision indexer. Service life is rated 30,000 hours at 100 rpm and 30 °C — about 3.4 years of continuous run time. The gearbox is lubricated for life, so no oil-change intervals in the maintenance schedule.
Obsolete — sourcing reality for the GBX0800051401F
Schneider Electric lists this gearbox as obsolete. Available through independent surplus and broker channels. Quantities are confirmed at RFQ — no stock-holding claim here. If you need a drop-in replacement for a line-down situation, the 80 mm frame size and 5:1 ratio are common; a cross-reference to a current-series planetary gearbox from the same or another brand may be possible, but no pin-compatible direct swap is documented.
Mounting and environmental limits
Operating ambient range is -25 to 90 °C. Maximum radial force on the output shaft is 650 N at mid-span for the 30,000-hour life target; axial force limit is 900 N at the same life. Exceed those and the bearing life drops fast. Noise level is 60 dB at 1 m, no-load — quiet enough for a production floor near operators without hearing protection, but not silent.