Product Description:

The BL-MU180R-20SB-A is an AC servo motor manufactured by Okuma as part of the BL Servo Motors series. It is intended for closed-loop drive axes in machine tools and automated handling cells, where controlled torque and position are required under continuously changing load conditions. Integrated within an Okuma drive package, the motor converts electrical energy to mechanical rotation and supplies motion that can be synchronized precisely with other axes in an industrial automation line.

During continuous operation, the motor can deliver 3.7 kW of mechanical output, a value derived from its rated speed and torque under thermal steady state. To sustain that power, the stator windings draw a phase current of 16.3 A, so the paired amplifier must accommodate this continuous demand and start-up surges. Nominal excitation is obtained at 154 V, establishing the internal back-EMF profile and matching the motor to Okuma's DC bus architecture. When commanded to its rated speed of 2000 rpm, the unit produces a shaft torque of 19.4 Nm; this combination supports feed drives that require moderate inertia matching while still achieving rapid acceleration and deceleration. All ratings assume ambient shop temperatures and unrestricted airflow around the housing.

Complementing those electrical figures, the integrally mounted encoder is the ER-FC-2048D, which provides 2,048 counts per revolution of position data. Because the feedback is absolute, rotor angle is available immediately at power-on, eliminating homing cycles and maintaining machining offsets after an emergency stop. A built-in holding brake locks the shaft whenever the drive is disabled, preventing drift on vertical or overhung loads. The motor frame weighs 30.00 kg, a mass that aids vibration damping yet must be considered when sizing linear guides or handling fixtures during installation.