What the key ratings mean for fit
The BEH18MM1023MA6C: This is a 1 kW servo motor from the Lexium 18 family, delivering 4.77 Nm continuous stall torque at 220 V and 2000 rpm nominal speed. The 4.77 Nm figure is the torque the motor can hold at standstill indefinitely without overheating — critical for positioning axes that hold a load at zero speed. The IP67 rating means the motor body is dust-tight and protected against temporary immersion — suitable for washdown environments in food-and-beverage or machine-tool coolant splash zones. The sealing relies on the connector mating and shaft seal, so the IP rating applies only when the two connectors are properly engaged. Feedback is a 17-bit magnetic multi-turn encoder, giving 131,072 points per turn. Magnetic encoders are more robust against shock and vibration than optical types — a practical advantage on axes with high acceleration or in machines that see regular starts and stops.
Mechanical integration — flange, shaft, and mounting
The motor uses an Asian standard flange with a 130 mm flange size and four mounting holes. The shaft is 22 mm diameter with a parallel key (8 mm key width) and 58 mm shaft length — no second shaft end, so it is a single-ended configuration for direct coupling to a load.
Electrical and thermal parameters
Continuous stall current is 5.31 A; peak current is 15.93 A at 220 V, delivering 14.31 Nm peak stall torque for short-duration acceleration. The torque constant is 0.898 N·m/A at 40 °C, and the back-EMF constant is 62.73 V/krpm — both measured at 40 °C, so expect slight derating at higher ambient temperatures. The motor has 10 poles and is air-cooled. Maximum mechanical speed is 3000 rpm, with a maximum axial force of 196 N and radial force of 686 N on the shaft — these force limits govern bearing life in belt-drive or overhung-load applications.