New FANUC A06B-0257-B400 AC Servo Motor with Brake for CNC and Industrial Automation

The FANUC A06B-0257-B400 AC Servo Motor is designed for CNC equipment and industrial automation systems that demand dependable torque output, accurate motion control, and stable long-term performance. In real production environments, servo motors must do more than simply rotate. They need to accelerate smoothly, hold steady under changing loads, and work with the control system to maintain repeatable positioning. This model is well suited to that role, making it a practical choice for machine tools, automated manufacturing systems, and professional replacement projects where motion quality matters every day.

Key Technical Data

The technical profile of this motor makes it a strong match for applications that need both servo precision and substantial drive capability. With 6.0 kW rated output, 38 Nm stall torque, and 130 Nm peak torque, it offers the kind of controlled strength required in demanding axis systems. The 24V brake adds extra value in equipment where holding performance after stop is important, while the A1000 feedback configuration supports accurate speed and position monitoring during continuous operation.

Built for Controlled Power and Reliable Axis Response

Some servo motors are selected purely for output. Others are chosen because they help the entire machine behave better. The A06B-0257-B400 belongs in the second category. It is designed for installations where torque delivery needs to remain stable, response needs to stay predictable, and the motor must support accurate axis movement without introducing unnecessary instability.

Its performance characteristics give it a practical balance between force and controllability. The motor’s 38 Nm stall torque supports dependable low-speed control and solid acceleration, while the 3000 min⁻¹ maximum speed allows it to keep pace with systems that require dynamic but well-managed motion. In CNC equipment, that means smoother axis transitions, more reliable positioning behavior, and better consistency through repeated production cycles.

Brake-Equipped Design for Better Holding Performance

A built-in brake is often one of the most valuable features in a servo motor replacement, especially in machines where the axis must maintain position after stopping. This model is commonly listed with a 24V brake, making it particularly relevant for systems where controlled stopping and holding performance are essential.

In practical industrial use, that added braking function can support safer shutdown behavior and help reduce unwanted movement when the machine is not actively driving the axis. For maintenance teams and rebuilders, this is more than a convenience feature. It is often a key part of preserving the machine’s original operating behavior.

A Practical Choice for Replacement and Integration

A successful servo replacement is rarely about part number matching alone. Shaft style, encoder type, brake configuration, and electrical characteristics all influence how well the motor will perform after installation. The A06B-0257-B400 is commonly described with a straight shaft, A1000 pulsecoder, and brake-equipped design, which gives buyers a solid compatibility profile when comparing it to existing machine hardware.

That combination makes this motor especially useful in established FANUC-based systems where uptime, repeatability, and smooth commissioning are priorities. For industrial buyers, service teams, and machine rebuilders, it represents a dependable option when the goal is to restore stable servo performance without compromising control accuracy.

Typical Applications

The FANUC A06B-0257-B400 AC Servo Motor is commonly used for:

• CNC machine tools

• Industrial automation equipment

• Precision axis control systems

• Servo replacement in compatible FANUC installations

• Motion control applications requiring brake-equipped servo performance

FAQ

Q1: What is the rated output of the FANUC A06B-0257-B400?
A1: The FANUC A06B-0257-B400 is commonly associated with a rated output of 6.0 kW. This gives it the capacity needed for CNC and industrial automation systems that require stronger servo performance than compact motor classes can provide. In practical applications, that output level supports solid axis drive capability while still allowing the control system to maintain precise and stable motion behavior.

Q2: Does the A06B-0257-B400 include a brake?
A2: Yes. Available product listings commonly describe this motor with a 24V brake. That brake configuration is especially useful in applications where the axis must hold position after stopping or where controlled shutdown behavior is important. In many CNC and industrial machines, a brake-equipped servo motor helps reduce unintended movement and supports better positional stability when power is removed.

Q3: What shaft and feedback configuration is commonly listed for this motor?
A3: This model is commonly described with a straight shaft and an A1000 or αiA1000 pulsecoder. These are important details because they affect both mechanical installation and control-side compatibility. For replacement work, confirming shaft structure and feedback type early helps reduce installation problems and improves the chances of restoring the machine’s original motion characteristics.

Q4: What speed and torque performance is associated with the A06B-0257-B400?
A4: The motor is commonly associated with a rated speed of 2000 min⁻¹, maximum speed of 3000 min⁻¹, 38 Nm stall torque, and 130 Nm maximum torque. These values indicate a motor designed for demanding servo applications where both controlled acceleration and reserve torque are important. For many buyers, this balance is one of the key reasons the model is suitable for serious CNC and automation service.

Q5: What kinds of applications is the FANUC A06B-0257-B400 suitable for?
A5: This servo motor is suitable for CNC machinery, industrial automation systems, precision axis assemblies, and compatible FANUC replacement projects. Its combination of 6.0 kW output, brake-equipped design, straight shaft, and A1000 feedback makes it especially relevant in systems where accurate motion, stable holding performance, and dependable long-term operation are essential.