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A06B-0142-B077

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A06B-0142-B077
May 13, 2026

A06B-0142-B077

FANUC AC Servo Motor Model: A06B-0142-B077 αi A12/2000 Series, Medium-Inertia, 2.1kW, Straight Shaft, Incremental Encoder 1. Product Overview 1.1 General Description The A06B-0142-B077 is a high-performance, medium-inertia AC servo motor from the FANUC αi A12/2000 series. Engineered for high torque, exceptional precision, and consistent stability, it is designed for demanding industrial motion control applications. This model features a straight keyed shaft, an aI64 incremental encoder, and standard IP54 protection, making it suitable for heavy-duty machine tools and automation environments. 1.2 Part Number Definition A06B: FANUC servo motor series prefix 0142: αi A12 frame size, medium inertia, 2000 rpm base motor B077: Straight keyed shaft, aI64 incremental encoder, no holding brake, standard flange No suffix #7008: Standard specification (IP54); IP65 available as an option with code #7008 1.3 Key Applications CNC machining centers, heavy-duty lathes, and grinding machines Industrial robots, gantry systems, and heavy automated assembly lines High-torque, medium-speed applications requiring a 2000 rpm rated speed Metalworking, packaging, and textile machinery General automation and material handling equipment

Description

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2. Technical Specifications

2.1 Electrical & Performance

  • Rated Output Power: 2.1 kW

  • Rated Speed: 2000 rpm

  • Rated Voltage: 186 VAC (3-phase)

  • Rated Current: 7.4 A

  • Rated Frequency: 133 Hz

  • Continuous Torque: 12 Nm

  • Stall Torque: Approximately 30 Nm

  • Stall Current: Approximately 22 A

  • Rotor Inertia: Medium

  • Encoder: aI64 incremental encoder (65,536 ppr)

  • Shaft: Straight keyed shaft, 35 mm diameter

  • Brake: Without holding brake

  • Insulation Class: F (155°C)

  • Cooling: Natural air cooling

  • Protection Grade: Standard IP54; IP65 optional (#7008)

  • Operating Ambient Temperature: 0°C to +55°C

  • Storage Ambient Temperature: -20°C to +70°C

  • Relative Humidity: 10% to 90%, non-condensing

  • Vibration Resistance: Up to 5G

  • Weight: Approximately 20.3 kg (44.8 lbs)

3. Mechanical Dimensions & Mounting

3.1 Shaft & Flange

  • Flange: Standard A12 flange (110 mm × 110 mm)

  • Shaft Diameter: 35 mm

  • Keyway: 10 mm × 8 mm × 45 mm (standard)

  • Mounting: Flange-mounted using 4 × M8 bolts on an 85 mm pitch circle

3.2 Cable Connections

  • Power Connector: 4-pin (U, V, W, PE)

  • Encoder Connector: 20-pin (aI64 encoder interface)

  • Cable Entry: Standard sealed glands (IP65 rating achieved with #7008 option)

4. Product Features

4.1 High-Torque Density

Delivers 12 Nm of continuous torque and 30 Nm of peak torque, providing exceptional power for heavy loads and high-force applications.

4.2 Incremental aI64 Encoder

The 65,536 ppr incremental encoder ensures precise position and speed feedback for closed-loop control systems. It is fully compatible with FANUC αi-B series servo amplifiers.

4.3 Medium-Inertia Rotor

Strikes an optimal balance between dynamic response and load stability. Ideal for applications with variable inertia or frequent speed changes.

4.4 Rigid & Durable Construction

Constructed with a cast aluminum housing, reinforced bearings, and a sealed design to ensure longevity and reliability under heavy loads and high-vibration conditions.

4.5 Standard Compatibility

Offers direct compatibility with FANUC αi-B series servo amplifiers, enabling plug-and-play replacement for existing A12/2000 motors.

5. Installation Instructions

5.1 Safety Precautions

  • Disconnect all power sources before performing any installation, wiring, or maintenance work.

  • Ensure the motor and amplifier are properly grounded to prevent electric shock hazards.

  • Never operate the motor beyond its published rated specifications.

5.2 Mechanical Installation

  1. Inspection: Examine the motor housing, flange, shaft, and keyway for any signs of damage, deformation, or corrosion.

  2. Mounting: Align the motor flange with the machine mounting surface. Tighten the four M8 mounting bolts evenly to a torque of 20–22 Nm to ensure flatness and concentricity.

  3. Shaft Connection: Install a suitable coupling (e.g., bellows, rigid, or jaw type) onto the shaft. Maintain strict coaxiality (≤0.1 mm runout) to avoid vibration, noise, or premature bearing failure.

  4. Shaft Protection: Avoid applying heavy impact, excessive radial loads, or axial pressure to the shaft.

5.3 Electrical Wiring

  1. Cable Selection: Use FANUC-specified power and encoder cables (or their equivalents) with adequate current ratings and shielding.

  2. Power Wiring: Connect the U, V, W, and PE wires to the motor power connector. Torque terminals to 1.5–1.8 Nm.

  3. Encoder Wiring: Connect the encoder cable to the 20-pin encoder connector. Verify correct pin assignment against the FANUC wiring diagram.

  4. Cable Routing: Avoid sharp bends (maintain a minimum bend radius of 10 × cable diameter), heavy compression, or crossing with high-voltage cables. Secure cables with ties to prevent strain.

  5. Grounding: Connect the motor frame PE terminal to the system ground bus.

5.4 Pre-Operation Check

  • Confirm all mounting bolts and cable connections are secure.

  • Verify correct encoder and power wiring.

  • Perform servo amplifier initialization, homing, and a no-load test run at low speed to confirm smooth operation and absence of abnormal noise or vibration.

6. Operation Precautions

6.1 Do Not Exceed Ratings

Avoid operation above the rated voltage, speed, or torque. Continuous overload will cause overheating, demagnetization, or permanent motor damage.

6.2 Avoid Frequent Reversals

Minimize prolonged, rapid forward/reverse jogging, which increases the risk of overcurrent and thermal stress.

6.3 Environmental Limits

Do not use in explosive, corrosive, or conductive dust environments. Maintain ambient temperature between 0°C and +55°C.

6.4 No Unauthorized Disassembly

Do not open the motor housing or tamper with the encoder/rotor. Doing so will void the warranty and may cause severe internal damage.

6.5 Abnormal Conditions

Immediately stop operation and cut power if abnormal noise, vibration, overheating (case temperature >80°C), or servo alarms occur.

7. Maintenance & Storage

7.1 Regular Maintenance

  • Cleaning: Wipe dust, oil, and debris from the motor surface. Keep cooling fins and ventilation areas unobstructed.

  • Monthly Inspection: Check mounting bolts, couplings, and cable terminals for looseness. Tighten as required.

  • Bearing Lubrication: Bearings are factory-lubricated for life under normal operating conditions. Replace bearings if noise or vibration increases.

  • Encoder Check: Verify encoder cable connections and seal integrity.

7.2 Storage

  • Store in a dry, cool, clean indoor space with a temperature of 5°C–35°C and relative humidity ≤85% (non-condensing).

  • Keep in original packaging whenever possible. Avoid direct sunlight, moisture, and dust.

  • Do not stack heavy objects on the motor.

  • Shelf Life: 12 months in original sealed packaging under recommended storage conditions.

8. Quality & Warranty

8.1 Compliance

Manufactured to FANUC’s stringent industrial quality and safety standards.

8.2 Testing

100% factory-tested for dynamic balance, electrical performance, and insulation resistance prior to shipment.

8.3 Warranty

12 months from the date of delivery under normal use and proper installation. Warranty is void if the motor is disassembled, modified, or damaged by misuse.

9. Ordering Information

  • Model Number: A06B-0142-B077

  • Description: AC Servo Motor, αi A12/2000, 2.1kW, 2000rpm, Medium Inertia, Straight Keyed Shaft, aI64 Incremental Encoder, No Brake


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