110 N.m continuous, 176 N.m peak — the two torque numbers that govern the motion profile
The GBX0800150702D is a 80 mm-frame planetary gearbox with a 15:1 reduction ratio. The continuous output torque is 110 N.m — this is the thermal limit for sustained duty, and the number to use for sizing the motor and drive for a constant-torque application like a conveyor or rotary indexer. The maximum output torque is 176 N.m, which covers acceleration peaks and occasional overloads, but the gearbox service life is rated at 30000 h at 100 rpm and 30 °C when staying at or below the continuous rating.
Backlash and torsional rigidity — what they mean for positioning accuracy
Maximum torsional backlash is 17 arc.min. For a single-stage planetary with straight teeth, this is a standard commercial-grade figure — adequate for general positioning and speed control, but not for precision indexing or contouring where you would need a low-backlash or preloaded gearbox. Torsional rigidity is 6.5 N.m/arcmin, which means the output shaft winds up about 0.15 arcmin per N.m of load. In a servo system, this windup adds to the total compliance and must be accounted for in the loop tuning — the inertia ratio between the motor rotor and the reflected load includes the gearbox inertia of 0.71 g.cm² at the input.
Load ratings that matter for the shaft and bearings
The output shaft is C45 steel and accepts radial and axial loads within defined limits. Maximum radial force Fr is 650 N at 100 rpm for the full 30000 h life, rising to 950 N if you accept a shorter 10000 h life. Maximum axial force Fa is 900 N at 100 rpm for 30000 h, or 1200 N for 10000 h. These forces assume the load is applied at mid-distance from the output shaft face — a belt drive or pinion mounted further out reduces the allowable load proportionally. The IP54 rating at the shaft output means the seal keeps out dust and light splash, but the gearbox housing itself is not sealed; the motor adapter flange must provide the environmental barrier on the input side.
94 % efficiency and thermal behaviour
Efficiency is 94 % — the 6 % loss heats the gearbox and limits the duty cycle at high torque and low speed. The gearbox is lubricated for life with grease, so there is no oil level to check or change, but the grease life sets the service life: 30000 h at 100 rpm and 30 °C ambient. The black anodized aluminium housing dissipates heat reasonably well, but in a confined cabinet or with a hot motor flange, the gearbox may need derating. Noise level is 60 dB at 1 m, no-load — a baseline for a spur-gear planetary; under load the noise will increase with torque and speed.