12.SM.20X-62XX KEB
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The KEB 12.SM.20X-62XX is a synchronous servo motor in the SM Synchronous Servo Motors series, with a rated power of 0.18 kW and rated speed of 6000 rpm. It has a rated torque of 0.18 Nm, operates at 230 V, and weighs 0.8 kg without the brake. The line cross section is 1.5 mm² and rotor inertia is 0.12 kgcm².
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Product Description:
The 12.SM.20X-62XX is a brushless synchronous servo motor built by KEB as part of the SM Synchronous Servo Motors series. It serves as a compact drive element that provides closed-loop speed and position control for packaging stations, pick-and-place modules, and other automated axes. By pairing with a matched servo inverter, the unit delivers fast response and repeatable motion that is essential for cycle-time-critical machinery. Its brushless design supports smooth commutation and avoids brush wear during repetitive duty. This makes it well suited for compact machinery that depends on frequent starts, stops, and precise indexing.
Under continuous duty, the motor reaches a rated speed of 6000 rpm, produced from a shaft output of 0.18 kW while the windings are supplied with a phase-to-phase voltage of 230 V. At that operating point, it draws a rated current of 0.89 A, a value that fits drive amplifiers with low continuous current ratings. The copper coils present a winding resistance of 21.99 Ω and a winding inductance of 4.7 mH, so current rise is moderated while still allowing rapid torque commands. A rotor inertia of 0.12 kg·cm² supports quick acceleration, and power is fed through conductors with a 1.5 mm² line cross section. The motor housing, without an integral brake, weighs 0.8 kg and minimizes load on small-frame gearboxes. The low moving mass also helps axes reverse direction quickly in light handling applications.
Transient loading is accommodated by a stall torque of 0.20 Nm, and during such zero-speed hold, the drive may supply a stall current of 0.93 A to keep the shaft locked. For positioning moves that do not exceed the rated torque of 0.18 Nm, heat generation remains within the motor’s thermal budget. The voltage constant of 13.0 V/1000 rpm links back EMF directly to shaft velocity, offering predictable behavior for sensorless monitoring schemes. Because torque is available at standstill, the motor can hold position during short dwell periods when the drive remains energized. These operating relationships provide clear margins when setting overload protection and servo gain values.
