Load torque and speed — sizing the BEH18LM4033MA6D
The BEH18LM4033MA6D delivers 12.6 Nm nominal torque at 3000 rpm on a three-phase 380 V supply, with a continuous power rating of 4000 W. That torque constant of 0.9722 Nm/A at 40 °C means the drive must supply about 13 A continuous to hold rated torque — the continuous stall current is 12.96 A. Peak stall torque reaches 37.8 Nm, so the motor can handle short overloads for acceleration or cutting cycles, but the drive's peak current capability (38.88 A maximum Irms) must match that demand.
Feedback and environmental sealing
The 17-bit magnetic multi-turn encoder provides absolute position feedback over multiple shaft revolutions — no homing sequence needed after a power cycle. The IP67 rating on the motor body and connectors means it withstands washdown and dusty environments; the two male/female connectors carry power and feedback, and the sealing relies on the connector O-rings being properly mated. The motor flange is the Asian standard 130 mm pattern with four 9 mm mounting holes. The shaft is 28 mm diameter with a parallel key (8 mm key width, 63 mm shaft length) and no second shaft end. Maximum radial force on the shaft is 686 N, maximum axial force 196 N — stay within these limits for bearing life.