Product Description:

The BL-80E-20T is a servo motor manufactured by Okuma and supplied within the BL Servo Motors series. Designed for closed-loop axis control in machine-tool and general automation equipment, this unit converts drive current into precisely coordinated mechanical rotation for feed, spindle, or auxiliary positioning tasks on production lines. Its brushless construction reduces maintenance demands and permits higher dynamic response than brushed designs. The motor integrates with Okuma drives through standard feedback and power connectors, which helps it fit multi-axis assemblies used for synchronized motion and repeatable positioning. This type of motor is commonly used where the control system must correct position error quickly after load changes. In machine tools, that behavior supports accurate feed motion and repeatable axis reversal.

The duty rating is Continuous, so the motor can deliver its output without scheduled cool-down intervals during normal operation. Classified as a Brushless Servo Motor, it uses electronic commutation and permanent-magnet excitation for smooth torque production and consistent response to drive commands. The rotor uses 4 magnetic poles, and this pole count sets the electrical input frequency needed to reach synchronous speed. Under nominal load, the drive must provide 7.5 A of phase current, and the motor can produce up to 1.5 kW of mechanical power. Shaft speed stabilizes at 2000 rpm, which suits common feed-axis service in CNC lathes and machining centers.

Rated steady-state torque reaches 73 kg-cm, which supports controlled acceleration and stable motion with moderate-inertia loads. The electrical interface is specified for 164 V, so the servo amplifier must maintain that level for stable speed regulation and reduced ripple during operation. When motion is held by the control loop, the motor can withstand a stall torque of 80 kg-cm before thermal limits are exceeded. This helps the axis resist external cutting or clamping forces while remaining in position between programmed moves. The available torque is useful in positioning tasks that involve frequent starts, stops, and dwell periods.