What this 100 W servo motor with brake delivers for a motion axis
The BEH18MB0133CA5C is a 100 W servo motor from the Lexium 18 family, fitted with a holding brake — the 'B' in the order code signals the brake variant. It delivers 0.32 Nm continuous stall torque at 220 V single-phase and spins to 3000 rpm nominal, which covers light indexing, pick-and-place, and conveyor positioning where the load must hold position when power drops. The 23-bit optic multi-turn encoder gives 8,388,608 counts per revolution absolute position — no homing sequence needed after a power cycle, which matters for multi-axis machines where lost position means a re-teach cycle.
Mechanical interface — flange, shaft, and sealing
Mounts on an Asian standard 40 mm flange with two 4.3 mm mounting holes — the bolt pattern matches common 40-frame servo mounts used across Asian-sourced machinery. The 8 mm shaft runs 25 mm long with a 3 mm parallel key, so the coupling or pulley bore must match that keyway. Maximum radial force Fr is 78 N and axial force Fa is 54 N — stay under these when sizing the belt tension or direct coupling to avoid bearing overload.
Electrical ratings that govern the drive match
Continuous stall current is 1.1 A and peak stall torque hits 1.12 Nm at 3.9 A Irms maximum — the drive must supply that peak current for acceleration without tripping. Torque constant is 0.29 Nm/A and back EMF constant is 20.1 V/krpm, both at 40 °C; these let you calculate the drive voltage needed to reach 3000 rpm under load. The 10 motor poles give a higher torque density than 8-pole designs at the same frame size, but the electrical frequency at 3000 rpm is 250 Hz — confirm the drive's current-loop bandwidth supports that.
The electrical connection uses two male/female connectors — the mating cable set is a separate order line; confirm the connector pinout matches the drive's feedback and power connectors before committing the BOM.