A06B-0115-B503
May 13, 2026

A06B-0115-B503

Product Instruction Manual Part Number: A06B-0115-B503 English Version (No Images) 1. Product Overview 1.1 Product Type FANUC AC Servo Motor with Power-off Holding Brake 1.2 Code Explanation A06B: FANUC servo motor and spindle motor series code 0115: Base motor model, defines frame size, power grade and low-inertia rotor structure B503: Integrated built-in power-off brake, keyed shaft, flange mounting and dedicated encoder specification 1.3 Product Description A06B-0115-B503 is a low-inertia high-performance AC servo motor with integrated power-off brake, developed for FANUC CNC machine tools and industrial automation systems. It adopts high-efficiency magnetic circuit and low-inertia rotor design, featuring fast acceleration/deceleration, high torque output and smooth low-speed operation. The built-in power-off holding brake locks the motor shaft immediately when power fails, effectively preventing vertical axis sliding and mechanical dropping, ensuring position retention and equipment safety. 1.4 Application Scope Widely used in CNC machining centers, vertical CNC machines, CNC lathes, grinding machines, drilling-tapping machines, robot joint axes and automated production lines; especially suitable for vertical and inclined feed axes requiring anti-drop brake function.

Description

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2. Technical Specifications

  • Rated voltage: AC 200V class

  • Insulation class: Class F

  • Cooling method: Natural air cooling

  • Operating ambient temperature: 0℃ ~ +55℃

  • Storage temperature range: -20℃ ~ +70℃

  • Relative humidity: 10% ~ 90%, non-condensing

  • Protection grade: Industrial dust-proof & oil-proof

  • Brake type: DC power-off holding brake

  • Installation method: Flange mounting

  • EMC: Industrial high anti-interference level

3. Product Features

  1. Integrated power-off brake design, reliable shaft locking after power cut, excellent anti-drop and position holding performance.

  2. Low-inertia rotor structure, fast response, outstanding acceleration and deceleration capability.

  3. High power density and strong overload capacity, stable torque output under variable load.

  4. Built-in high-resolution encoder, supports high-precision closed-loop positioning and repeated accuracy.

  5. Optimized low cogging torque, smooth micro-feed and low-speed operation without jitter.

  6. Fully sealed industrial structure, good dustproof, oil resistance and long service life; compatible with original FANUC drive for direct replacement.

4. Installation Instructions

  1. Cut off all power of machine tool and servo system before installation.

  2. Inspect motor appearance, flange, shaft and keyway for no damage, deformation or rust.

  3. Fix motor on the mechanical mounting surface with standard bolts, fasten evenly to ensure flatness.

  4. Install coupling with strict coaxiality control to reduce vibration, noise and abnormal wear.

  5. Connect power cable, encoder cable and brake control cable strictly per wiring diagram.

  6. Arrange cables properly, avoid sharp bending, heavy extrusion and crossing with high-voltage lines.

  7. Recheck all mechanical fastenings and wiring connections.

  8. Power on, perform servo initialization, origin calibration and no-load test run.

5. Operation Precautions

  1. Do not exceed rated voltage, speed and load range to avoid motor overheating and burnout.

  2. Avoid frequent rapid forward/reverse jogging to prevent overcurrent impact and thermal overload.

  3. Do not apply in environments with heavy dust, oil mist, corrosive gas or water splash.

  4. Ensure reliable equipment grounding to prevent electric leakage and electromagnetic interference.

  5. Do not disassemble motor, brake assembly and encoder without professional authorization.

  6. Stop operation and cut off power immediately if abnormal noise, vibration, overheating or shaft slipping occurs.

6. Maintenance and Storage

Regularly clean motor surface dust and oil dirt, keep heat dissipation area unobstructed.
Periodically check mounting bolts, coupling tightness and cable connector looseness.
Regularly verify brake holding performance to ensure no slipping after power off.
Store in dry, ventilated, dust-free space without corrosive gas.
Storage temperature: 5℃ ~ 35℃, relative humidity ≤ 85%, non-condensing.
Avoid collision, extrusion and motor shaft deformation.
Shelf life: 12 months under original sealed packaging and standard storage conditions.

7. Quality Statement

  1. A06B-0115-B503 complies with FANUC industrial manufacturing standards and electrical safety specifications.

  2. All units pass dynamic balance test, performance test, brake holding test and aging test before delivery.

  3. This manual is applicable to original and compatible replacement parts of A06B-0115-B503 servo motor.


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