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FANUC A20B-1001-0120


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Part NumberA20B-1001-0120
Model #A20B10010120
Warranty2 Year
CategoryPC Board
BoardSpindle drive
PCBSpindle drive
AC SP driveDigital

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed A20B-1001-0120 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this A20B-1001-0120 we also repair a wide range of other FANUC products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty A20B-1001-0120, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 1lb

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Ask about exchanging your faulty A20B-1001-0120 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

FANUC A20B-1001-0120 Overview

Fanuc A20B-1001-0120

The A20B-1001-0120 is a digital AC spindle drive board, commonly used in industrial applications for controlling the speed and operation of electric spindle motors. This specific board is manufactured by various companies and is designed to meet the precise requirements of machining processes, making it an essential component in CNC (Computer Numerical Control) machines and other automated systems. 

Key Features

  1. Digital Control: The A20B-1001-0120 is a digital spindle drive board, which means it utilizes advanced digital signal processing techniques to control the spindle motor's speed, direction, and other parameters with precision.
  2. AC Spindle Drive: This board is specifically designed for AC (alternating current) spindle motors, making it compatible with a wide range of industrial machines that use AC motors for their spindle operations.
  3. Customizable Settings: The board typically allows for the customization of various spindle parameters, such as speed, acceleration, and deceleration, to match the requirements of different machining tasks.
  4. Protection Mechanisms: To ensure the safety of the spindle motor and the machinery, these boards often come equipped with protective features such as overcurrent protection, overvoltage protection, and thermal protection.
  5. Compact Form Factor: The A20B-1001-0120 is designed to fit within the control cabinet of CNC machines, taking up minimal space while providing critical spindle control functionality.

Functions and Significance

  1. Spindle Speed Control: One of the primary functions of the A20B-1001-0120 board is to control the speed of the spindle motor accurately. This control is crucial for achieving the desired cutting or machining speeds in various materials.
  2. Direction Control: The board also facilitates the control of the spindle motor's rotational direction, allowing it to switch between forward and reverse motion as needed for specific machining operations.
  3. Acceleration and Deceleration Control: Precise acceleration and deceleration control are essential to prevent sudden speed changes that could damage the workpiece or the machine itself. This board enables smooth transitions between different speeds.
  4. Load Monitoring: In some configurations, these boards can monitor the load on the spindle motor. This information is valuable for optimizing cutting conditions and ensuring the motor operates within its safe limits.
  5. Synchronization: In multi-axis machining systems, the spindle drive board can be synchronized with other motion control components to ensure coordinated movement during complex machining tasks.
  6. Fault Detection: The board can detect and respond to various faults or abnormalities in the spindle motor's operation, such as overcurrent conditions or overheating. It will trigger protective measures to prevent damage.


The A20B-1001-0120 AC digital spindle drive board finds application in a wide range of industries and machining processes. Some common applications include:

  1. Metalworking: In CNC milling and turning machines, this board controls the spindle motor to precisely cut and shape metal parts for industries like automotive, aerospace, and manufacturing.
  2. Woodworking: In woodworking machinery, such as CNC routers and saws, the board ensures accurate and controlled cutting of wood and other materials.
  3. Plastics Processing: CNC machines used for plastic machining benefit from this board's precise spindle speed control to create intricate plastic parts.
  4. Glass and Stone Processing: In industries like glass cutting and stone machining, the board is essential for achieving fine details and smooth finishes.
  5. High-Speed Machining: The ability to control spindle speed with precision is particularly critical in high-speed machining applications, where accuracy and surface finish are paramount.


The A20B-1001-0120 AC digital spindle drive board is a fundamental component in CNC machines and industrial automation systems, enabling precise control over spindle motors for machining tasks. Its ability to regulate spindle speed, direction, and other parameters makes it a key player in achieving accuracy, efficiency, and quality in manufacturing processes across various industries.

FANUC products are manufactured in Japan and are designed for Commodity production, advanced machining, and CNC milling usage. They come with a 2-year warranty from MRO Electric. We also carry PCBs from other manufacturers such as Siemens and Control Techniques.

Contact Us Today For More Information About FANUC Products

Check out the rest of our FANUC product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like A20B-1001-0120, take a look at more from our PCBs line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our A20B-1001-0120 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

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Over 1700 Ratings from Actual Customers

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Very happy with the overall service, delivery, communication and delivery,

Conley Cooke

I needed a special drive, found it, and I was quickly assisted by Joe Kaminski. Everything was exactly as it should be....


We have an older DMU80 CNC Machine and the Handheld Control was damaged beyond repair. MRO was very helpful in confirmin...

Abbey-Purchasing Specialist