A06B-0162-B575#0076 Fanuc Servo Motor A06B0162B575#0076 AO6B-OI62-B575#OO76

Fanuc A06B-0162-B575#0076 AC Servo Motor — αiS Series

Built for Precision. Trusted on the Floor.

The Fanuc A06B-0162-B575#0076 is a high-performance AC servo motor from Fanuc's αiS (alpha-iS) series — a line widely regarded as the backbone of modern CNC machining environments. Whether you're running multi-axis milling centers, turning machines, or robotic automation cells, this motor is engineered to deliver the torque consistency and positional accuracy that demanding production schedules require.

What Sets This Motor Apart

At the core of the αiS series design is Fanuc's focus on thermal stability and long duty-cycle reliability. The motor integrates a high-resolution serial pulse encoder, enabling extremely tight closed-loop feedback that keeps positioning errors virtually eliminated even at sustained high speeds. This makes it particularly well-suited for applications where surface finish and dimensional tolerance are non-negotiable.

The B575 configuration pairs a specific winding arrangement with a power rating optimized for mid-range CNC axes — delivering strong continuous torque without oversizing the drive system. The #0076 suffix denotes the inclusion of an integrated electromagnetic holding brake, a critical feature for vertical-axis installations where gravity loading must be held safely during power-off or emergency stop events.

Key Features at a Glance

• Series: Fanuc αiS (Alpha-iS) AC Servo Motor
• Encoder Type: High-resolution serial encoder (built-in)
• Brake: Integrated electromagnetic holding brake (#0076)
• Drive Compatibility: Fanuc αi-series and βi-series servo amplifiers
• Environmental Protection: IP65-rated housing
• Cooling Method: Natural convection (totally enclosed)
• Connector Style: MS-style military-grade plug
• Designed for: CNC lathes, machining centers, multi-axis systems

Designed to Work Seamlessly in Fanuc Ecosystems

One of the practical advantages of this motor is its native compatibility with Fanuc's full αi amplifier family. No additional interface cards, no parameter translation — just direct integration with the CNC control. Technicians familiar with Fanuc systems will find commissioning straightforward, and the motor's parameter set aligns cleanly with standard Fanuc servo tuning workflows.

The IP65-rated enclosure shunts coolant splash, metal chips, and dust away from the windings and encoder assembly, maintaining signal integrity even in demanding shop-floor conditions. The shaft seal and cable exit design reflect the kind of real-world engineering detail that separates purpose-built industrial motors from general-purpose alternatives.

Brake Option — Why It Matters

The electromagnetic holding brake in the #0076 variant is spring-engaged and electrically released — meaning it defaults to the locked position without power. This fail-safe behavior protects vertical Z-axis loads from dropping during e-stop events or power interruptions. For machine builders and retrofit engineers working on vertical machining centers, gantry systems, or robotic arms, this is not an optional extra — it's a safety requirement. Fanuc's brake integration is compact, factory-balanced, and adds minimal rotating inertia to the system.

Replacement, Retrofit & Repair Considerations

The A06B-0162-B575#0076 is a direct drop-in replacement for any installation already using this part number. For retrofit applications, confirm that your servo amplifier's axis card supports the αiS motor series encoder protocol before installation. Fanuc's FSSB (Fanuc Serial Servo Bus) architecture makes cross-checking straightforward through the CNC parameter screens.

When sourcing a replacement unit, inspect the shaft for runout, verify the brake engages and releases cleanly at rated voltage, and confirm the encoder cable connector is free of corrosion or bent pins — these are the three most common points of wear in field-returned units.

FAQ

Q1: Is the A06B-0162-B575#0076 compatible with all Fanuc CNC controls?

A: It is designed for use with Fanuc αi-series servo amplifiers. Compatibility with your specific CNC control depends on the amplifier version and software parameters — always verify the drive series before ordering.

Q2: What does the #0076 suffix mean on this motor?

A: The #0076 designation indicates the motor is equipped with an integrated electromagnetic holding brake. This is a spring-set, power-release brake commonly required for vertical-axis applications.

Q3: Can this motor be repaired, or should it be replaced outright?

A: Fanuc servo motors can often be professionally rewound or have encoders replaced. That said, for production-critical machines, a tested replacement unit typically offers faster turnaround and more predictable reliability than a field repair.

Q4: What is the encoder resolution on the αiS series motors?

A: The αiS series uses Fanuc's high-resolution serial encoder. The exact pulse count per revolution depends on the specific encoder version fitted — consult the motor nameplate or Fanuc documentation for your unit's specification.

Q5: How do I know if my current motor needs to be replaced?

A: Common indicators include abnormal vibration, overheating alarms on the CNC, encoder error codes (such as SV0300-series alarms on Fanuc systems), unusual noise from the shaft end, or a brake that no longer holds load at rest.