Planetary gearbox, 5:1, 110 N.m continuous — now obsolete
The GBX0800051004F is a straight-tooth planetary gearbox from the Schneider GBX family, with an 80 mm housing diameter and a 5:1 reduction ratio. Continuous output torque is 110 N.m at 100 rpm and 30 °C, with a maximum intermittent torque of 176 N.m at the same speed and temperature. This gearbox is now listed as Obsolete by Schneider Electric, so new builds looking for a drop-in replacement will need to source through surplus or broker channels. The specs here are what you need to confirm fit for a line-down replacement or a BOM freeze.
Torque, backlash, and service life at rated speed
Rated continuous torque is 110 N.m (973.6 lbf.in) at 100 rpm and 30 °C; the maximum output torque hits 176 N.m (1557.7 lbf.in) under the same conditions — that 60 % headroom covers short-duration overloads. Torsional rigidity is 6 N.m/arcmin, meaning the shaft twists 1 arcmin for every 6 N.m of applied torque, which matters for positioning accuracy in pick-and-place or indexing applications. Maximum torsional backlash is 9 arc.min — this is the lost motion when reversing direction, a key spec for servo-driven axes where repeatability matters. Service life is 30 000 hours at 100 rpm and 30 °C, and the unit is lubricated for life, so no maintenance oil changes in that window.
Efficiency, noise, and mechanical ratings
Efficiency is 94 %, which is typical for a single-stage planetary with straight teeth — the rest is heat loss, so the black anodized aluminium housing (80 mm OD) acts as the heat sink. Noise level is 60 dB at 1 m, no-load, quiet enough for a small shop floor without enclosures. Maximum axial force (Fa) is 1200 N at 100 rpm for 10 000 hours, derating to 900 N for the full 30 000-hour life. Maximum radial force (Fr) applied mid-shaft is 950 N at 100 rpm for 10 000 hours, or 650 N for 30 000 hours. Shaft output has IP54 protection — splash-resistant but not washdown-rated. Shaft material is C45 carbon steel, housing is black anodized aluminium.
Sourcing an obsolete GBX gearbox
That means the only channel is independent surplus and broker stock. We source these per RFQ — confirm the quantity and we'll check our network for traceable units. No pin-compatible drop-in from the current Schneider catalog has been published. If you're holding a BOM with this code, the decision is either to buy available surplus now or re-engineer the mount and ratio for a current planetary gearbox.