FANUC A20B-8100-0171 Automation

( Brand: Fanuc ), ( Manufacturer Part Number: A20B-8100-0171 )

Review FANUC A20b81000171 Used

The **FANUC A20B-8100-0171 (A20B81000171)** is a precision-engineered servo motor amplifier module designed exclusively for integration with FANUC s advanced CNC systems, specifically tailored for high-performance industrial automation applications. This compact yet robust unit serves as the power and control interface between a CNC controller and its associated servo motors, enabling seamless motion control with exceptional accuracy, responsiveness, and reliability. Built to FANUC s stringent engineering standards, the A20B-8100-0171 operates within a current rating of 8 amps per axis, making it ideal for driving medium to high-power servo motors in applications such as CNC machining centers, robotics, packaging machinery, and automated assembly lines. Its modular design allows for easy installation within FANUC s AlphaSeries, AlphaMotion, or other compatible CNC platforms, ensuring seamless compatibility with existing control systems.

The amplifier module incorporates FANUC s proprietary **AlphaServo** technology, which delivers superior motion control performance through advanced digital signal processing, high-resolution feedback handling, and adaptive torque control. This enables smoother acceleration, deceleration, and velocity regulation, reducing mechanical stress on the motor and enhancing overall system efficiency. The A20B-8100-0171 supports a wide range of communication protocols, including FANUC s proprietary **iDNC (Intelligent Distributed Numerical Control)** and **FOC (Field-Oriented Control)**, which optimize motor performance across varying load conditions. Additionally, it features built-in diagnostics and fault detection capabilities, providing real-time monitoring of motor health, temperature, and electrical parameters to minimize downtime and extend equipment lifespan.

Constructed with high-grade materials and subjected to rigorous testing, this amplifier module operates reliably in industrial environments with temperature ranges from **0 C to 55 C (32 F to 131 F)** and humidity levels up to **90% non-condensing**, ensuring durability in demanding settings. Its compact form factor and standardized mounting interface simplify integration into control cabinets, while its **PLC-compatible I/O** options allow for flexible system expansion and customization. Whether deployed in high-speed milling operations, precise positioning tasks, or dynamic robotic applications, the A20B-8100-0171 delivers the power, precision, and reliability required to meet the most exacting industrial automation demands. As a critical component in FANUC s motion control ecosystem, it exemplifies the brand s commitment to innovation, performance, and long-term operational excellence.

### **Analysis of Buying a FANUC A20B-8100-0171 (A20B81000171) Servo Motor**

The **FANUC A20B-8100-0171** is a high-performance servo motor commonly used in industrial automation, CNC machines, and robotic applications. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of buying a FANUC A20B-8100-0171**

1. **High Performance and Precision**

- The A20B series is known for its **high torque density, smooth motion control, and low inertia**, making it ideal for applications requiring **high-speed, high-accuracy positioning** (e.g., CNC milling, pick-and-place robots, packaging machines).

- FANUC s **closed-loop feedback system** (encoder-based) ensures **minimal backlash and repeatability**, critical for precision manufacturing.

2. **Reliability and Durability**

- FANUC is a **leading brand in industrial automation**, with a reputation for **long-term reliability** and **low failure rates** in harsh environments.

- The motor is built with **high-quality materials**, including **high-temperature-resistant bearings and sealed enclosures**, making it suitable for **continuous operation** in factories.

3. **Compatibility with FANUC CNC and PLC Systems**

- The **A20B-8100-0171** is designed to integrate seamlessly with **FANUC CNC controllers (e.g., Series 0i, 0i-F, 16i, 18i)** and **PLCs**, reducing compatibility issues.

- FANUC s **proprietary communication protocols (e.g., SERCOS, EtherCAT)** ensure **fast, stable data exchange**, improving overall system performance.

4. **Energy Efficiency**

- FANUC servo motors are optimized for **efficient power consumption**, especially in **variable-speed applications** where the motor doesn t run at full load constantly.

- Features like **regenerative braking** help reduce energy waste, lowering operational costs.

5. **After-Sales Support and Availability of Spare Parts**

- FANUC has a **global network of authorized distributors and service centers**, ensuring **easy access to spare parts, maintenance, and technical support**.

- The motor s **long production history** means **second-hand or refurbished units are widely available**, reducing costs if purchasing used.

6. **Modular and Upgradable**

- FANUC servo systems allow for **easy upgrades** newer firmware or controllers can often be retrofitted to older motors.

- The **A20B series can be paired with different gearboxes, encoders, and amplifiers**, offering flexibility in system design.

7. **Industry Standard in Automation**

- Many **OEMs and machine builders** prefer FANUC components due to their **proven track record**, making this motor a **safe choice for new installations or replacements**.

---

### **Cons of buying a FANUC A20B-8100-0171**

1. **High Upfront Cost**

- FANUC servo motors are **more expensive** than some competitors (e.g., Siemens, Yaskawa, or Chinese brands like **Kollmorgen or Beckhoff**).

- The **A20B-8100-0171 specifically** may be **pricier than newer models** (e.g., FANUC s **A20B-8100-0172 or A20B-8100-0173**), which offer slight improvements.

2. **Proprietary Dependence**

- FANUC s **closed ecosystem** means **limited third-party support** repairs or modifications may require **official FANUC technicians**.

- **Non-FANUC controllers or PLCs** may require **additional interfaces or converters**, increasing complexity.

3. **Potential Obsolescence**

- While still widely used, the **A20B series is older** compared to FANUC s **latest models (e.g., A20B-8100-0175, A20B-8100-0176)**, which may offer **better efficiency, digital communication, and smart features**.

- Some **newer FANUC CNC systems** may not fully support older servo models without **firmware updates or adapters**.

4. **Maintenance and Training Costs**

- FANUC systems require **specialized training** for technicians, which can be a **barrier for smaller shops or non-FANUC users**.

- **Spare parts for older models** (though available) may become **harder to source over time** compared to newer, more standardized components.

5. **Size and Weight Considerations**

- The **A20B-8100-0171 is a larger motor** (8100 series), which may **limit installation options** in space-constrained applications.

- **Higher inertia** compared to smaller servo motors (e.g., A4 or A6 series) may require **additional tuning for dynamic applications**.

6. **Potential for Counterfeit or Used Units**

- If purchasing **second-hand**, there is a risk of **counterfeit or refurbished units** that may not meet original specifications.

- **No-warranty used motors** could lead to **unexpected downtime** if not properly inspected.

7. **Limited Smart Features Compared to Newer Models**

- Older FANUC servos lack **advanced diagnostics, IoT connectivity, or predictive maintenance features** found in **latest-generation FANUC servos (e.g., A20B-8100-0175 with FANUC iHMI integration)**.

---

### **Conclusion**

The **FANUC A20B-8100-0171** is a **highly reliable, precision-driven servo motor** that remains a **strong choice for industrial applications** where **FANUC compatibility, durability, and performance** are critical. It excels in **CNC machining, robotics, and automated manufacturing** where **consistency and longevity** are prioritized over the latest smart features.

- **Budget-conscious buyers** (where newer or alternative brands may offer similar performance at a lower cost).

- **Applications requiring advanced smart features** (e.g., real-time diagnostics, cloud connectivity).

- **Users who prefer open-standard systems** (e.g., EtherCAT, Modbus) over FANUC s proprietary protocols.

If **cost is not a major concern** and **FANUC s ecosystem is already in use**, this motor remains a **solid, long-term investment**. For **new installations or cost-sensitive projects**, evaluating **newer FANUC models (e.g., A20B-8100-0175) or competitive alternatives** may be more advantageous.

---

### **Recommendation**

- You are **replacing an existing FANUC system** and need **full compatibility**.

- Your application **requires the proven reliability** of FANUC in a **high-precision, high-duty-cycle environment**.

- You have **budget flexibility** and want a **long-term solution** with **minimal future upgrade risks**.

- You are **replacing a failed FANUC servo** and need a **cost-effective alternative**.

- You **verify the unit s history** (e.g., from a **trusted distributor** with warranty).

- You **accept some risk** in exchange for **significant cost savings**.

- **FANUC A20B-8100-0175/0176** (newer, more efficient).

- **Siemens S120/S130** (similar performance, open standards).

- **Yaskawa Sigma-7/Sigma-9** (good balance of cost and performance).

- **Kollmorgen AKD/AKM** (high performance, open architecture).

- You need **smart features** look into **FANUC s latest servos with iHMI integration** or **Beckhoff s TwinCAT systems**.

- **Test the motor thoroughly** before full installation (check for **mechanical wear, encoder accuracy, and communication stability**).

- **Document all specifications** (voltage, current, torque curve) to ensure **proper matching with your amplifier and controller**.

- **Train operators/maintenance staff** on **FANUC-specific diagnostics and troubleshooting**.

### **Final Verdict**

The **FANUC A20B-8100-0171 is a high-quality, battle-tested servo motor** that remains a **top-tier choice for FANUC-based systems**. However, **careful consideration of alternatives and long-term needs** is essential to ensure the best **cost-performance balance** for your specific application. If **compatibility and reliability** are non-negotiable, it is a

Details:

FANUC A20B-8100-0171 / A20B81000171 USED DISCONTINUED BY MANUFACTURER, INTEGRATED CIRCUIT BOARD. Sells new and surplus product develops channels to purchase such. Call to use a shipping service other than the ones listed. All products are guaranteed to be working but may show signs of use if purchasing a used product.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: a20b81000171 prices

• $500.00-$1193.99

specifications automationjack:

• brand: Fanuc
• mpn: A20b-8100-0171

seller automationjack:

• rating: 99.6%
• # reviews: 193988
• city: 1 Millennium Dr, Willingboro, NJ 08046

returns automationjack:

• policy: Returns Accepted
• paid by: Buyer
• method: Money back
• time: 30 Days

shipping automationjack:

• cost: $12.90
• class: Standard
• type: Fixed
• service: Standard
• transit: 29-34 Days

payments automationjack:

• credit card: Mastercard
• other
• wallet: Paypal

offer automationjack:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: March 10, 2026
• sold: 0

general automationjack:

• condition: Used
• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment

Fanuc A20B-8100-0171 Is Similar To:

• Fanuc A20b-8100-0790 A20b-8101-0790 Used 30 Day Guarantee (66.7% similar) Shipped with USPS priority mail. 30 day guarantee. I have 4 for sale. This is a refurbished Fanuc A02B-0101-0790 / control board...(January 19th, 2024)
• Fanuc A16b-2202-0421 Used Ge (52.9% similar) Part #: Fanuc A16B-2202-0421 for sale...(August 6th, 2024)
• Fanuc A05b-2518-c302 egn Used And Tested Teach Pendant (38.3% similar) Product specifications: brand name. Used tested Fanuc A05B-2518-C302#EGN teach pendant. Product feature: Fanuc A05B-2518-C302#EGN...(August 12th, 2024)
• Fanuc A20b-2101-0391 1pcs Used (65.7% similar) Return police: shipping detail. It will just take you 1 minute. Please leave a telephone number for on-time delivery. Serious buyers only, please. You should receive the item within 2-4 weeks. The product at fixed price, please pay as soon possible after the purchase...(August 14th, 2024)
• Fanuc A20b-3300-0381 1pcs Used (65.7% similar) Serious buyers only, please. Shipping detail. It will just take you 1 minute. Return police: you should receive the item within 2-4 weeks. The product at fixed price, please pay as soon possible after the purchase. Please leave a telephone number for on-time delivery...(August 14th, 2024)
• Fanuc A06b-6290-h106 One Used Servo Amplifier (44.7% similar) Please leave a telephone number for on-time delivery. The product at fixed price, please pay as soon possible after the purchase. Return police: it will just take you 1 minute. Serious buyers only, please. Shipping detail. You should receive the item within 2-4 weeks...(August 14th, 2024)
• Fanuc A06b-1444-b103 1pc Servo Motor Used (46.9% similar) The product at fixed price, please pay as soon possible after the purchase. Shipping detail. It will just take you 1 minute. Serious buyers only, please. You should receive the item within 2-4 weeks. Return police: please leave a telephone number for on-time delivery...(August 15th, 2024)
• Fanuc A06b-6290-h124 1pc Servo Drive Used (49.4% similar) Return police: the product at fixed price, please pay as soon possible after the purchase. Shipping detail. You should receive the item within 2-4 weeks. Please leave a telephone number for on-time delivery. It will just take you 1 minute. Serious buyers only, please...(August 15th, 2024)
• Fanuc A06b-0238-b101 1pc Servo Motor Used (51.9% similar) Return police: serious buyers only, please. You should receive the item within 2-4 weeks. Please leave a telephone number for on-time delivery. Shipping detail. The product at fixed price, please pay as soon possible after the purchase. It will just take you 1 minute...(August 15th, 2024)
• Fanuc A06b-0371-b575 1pc Servo Motor Used (51.9% similar) The product at fixed price, please pay as soon possible after the purchase. Shipping detail. You should receive the item within 2-4 weeks. Return police: please leave a telephone number for on-time delivery. It will just take you 1 minute. Serious buyers only, please...(August 15th, 2024)
• Fanuc A06b-0373-b077 One Used Servo Motor Tested Good (43% similar) Serious buyers only, please. It will just take you 1 minute. Return police: please leave a telephone number for on-time delivery. You should receive the item within 2-4 weeks. The product at fixed price, please pay as soon possible after the purchase. Shipping detail...(August 15th, 2024)