Sizing the 5 kW Lexium 18 against the load
The BEH18LM5033CF6D sits in the Lexium 18 line as a 5000 W three-phase servo sized for machinery that needs serious continuous torque rather than a peak-only rating. Nominal torque is 15.8 N.m at 380 V three-phase, with a continuous stall torque also at 15.8 N.m and a peak stall ceiling of 47.4 N.m, so the working envelope stays close to nominal across the speed range — there is no marketing-only peak figure to discount back to a real duty number. Nominal speed is 3000 rpm at 380 V three-phase and maximum mechanical speed is also 3000 rpm, meaning the rating is not field-weakened: the drive runs the motor straight up to base speed without needing a flux-weakening region. Continuous stall current is 16.77 A against a maximum Irms of 50.31 A at 5 kW, 380 V, so the drive can deliver roughly three times nominal current for acceleration before tripping. The torque constant of 0.942 N.m/A at 40 °C lets you read the current command on the drive nameplate directly against the torque demand — 16.77 A stalls into 15.8 N.m, which checks out against the nominal figure.
23-bit feedback, holding brake, and the shaft end
Feedback is a 23-bit optic multi-turn encoder, absolute over the full power cycle — no home run on power-up, no battery-backed Hiperface dance. The brake is a holding brake, sized to hold the rotor at standstill rather than to stop a spinning load on its own; the spec to trust for an E-stop mechanical stop is the peak torque (47.4 N.m,) and the drive's braking resistor stack, not the holding torque of 16 N.m. The shaft is a parallel-key design, 28 mm diameter with an 8 mm key and 63 mm of usable shaft length, so coupling selection follows the standard 28 mm keyed envelope with no second shaft end to worry about for retrofit or belt-drive geometry.
IP67, axial/radial loads, and the Asian standard flange
IP67 means the motor body and seal path survive a hose-down and temporary immersion, not just a splash — on a washdown skid or a food-line guarding enclosure, the cable gland and mating connector seal become the deciding pair, and the motor body itself is no longer the weak link. On the wet-well end of the plant, IP67 is not full-submersion service, so spec the cable entry and the conduit drop separately if the motor sits below the flood line. Cooling is air-cooled, so a sealed cover that blocks the fins forfeits the continuous rating. The motor flange is 130 mm on an Asian standard flange with 9 mm mounting holes, so a North-American NEMA-pattern gearbox does not bolt up directly without an adapter. Maximum radial load is 686 N and maximum axial load is 196 N — those are the bearing-life limits a side-mounted belt or pinion must respect, not just the shaft torque.