Planetary gearbox, 15:1 ratio — torque and stiffness for servo-driven axes
The GBX0800151101G is a planetary gearbox with straight teeth, 80 mm outer diameter, and a 15:1 reduction ratio. It delivers a continuous output torque of 110 N.m at 100 rpm and a maximum output torque of 176 N.m at 100 rpm, both rated at 30 °C. The 94 % efficiency means roughly 6 % of input power is lost as heat — budget this into the motor sizing and thermal profile of the enclosure. Torsional rigidity is 6.5 N.m/arcmin and maximum torsional backlash is 14 arcmin. For a servo-driven indexing axis, the backlash figure sets the repeatability floor — a 14 arcmin lost motion at the output translates to about 0.23° of position uncertainty before the controller compensates. The moment of inertia reflected to the motor side is 0.71 g.cm², which is low enough that a servo loop tuned for the load inertia ratio will not fight the gearbox inertia.
Duty-cycle envelope — service life and force limits at 100 rpm
Rated service life is 30,000 hours at 100 rpm and 30 °C. Maximum axial force (Fa) is 1200 N at 100 rpm for a 10,000-hour life, derated to 900 N for the full 30,000-hour target. Maximum radial force (Fr) applied at mid-span on the output shaft is 950 N for 10,000 hours or 650 N for 30,000 hours. These are the load boundaries for sizing the coupling and the driven shaft — exceeding them shortens the bearing or gear life below the stated service hours. The housing is black anodized aluminium; the output shaft is C45 steel. Lubricated for life, so no grease-change interval on the maintenance schedule.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX0800151101G as obsolete. The part is available through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ. For a BOM line that requires this exact ratio and torque class, the sourcing path is a per-order quote against the available inventory. No pin-compatible or dimensionally identical replacement from Schneider Electric's current GBX series has been published. If the application allows a parametric substitute — same 80 mm diameter, 15:1 ratio, and 110 N.m continuous torque — a cross-reference search against the GBX family's active order codes is the next step, but the mounting flange and shaft dimensions must be verified against the original drawing.