Quick Answer — FANUC vs Yaskawa Servo: Which Should You Choose?
Short answer: For high-torque, heavy-duty CNC applications with deep legacy integration, FANUC is the clear winner—its Alpha series delivers up to 12 Nm torque and 4000 RPM with absolute encoders. For flexible, high-speed automation requiring cost-effective modular drives (Sigma-V series), Yaskawa offers superior value, especially in low-to-mid power ranges (0.1–3.0 kW) with 20-bit encoder precision. Choose FANUC for CNC machine tools; choose Yaskawa for general factory automation and robotics.
When comparing FANUC vs Yaskawa Servo systems, your decision hinges on three factors: the existing control architecture, torque and speed requirements, and total cost of ownership. FANUC's proprietary FSSB bus locks you into their ecosystem, which is ideal if you already run FANUC Series 16/18/21 controllers. Yaskawa's open-architecture approach—supporting MECHATROLINK-II, analog, and pulse-train interfaces—makes it the best Servo brand for mixed-vendor PLC environments. For a FANUC Servo comparison that matters on the factory floor, we'll break down real in-stock models, verified specs, and current pricing below.
Head-to-Head Comparison Table: FANUC vs Yaskawa Servo Specifications
This table compares representative in-stock models from both brands. FANUC A06B-0213-B001 (Alpha iF 12/4000) delivers 12 Nm at 4000 RPM with 16-bit absolute encoder, priced $2000–3500. Yaskawa SGMJV-08A3A61 (Sigma-V 750W) offers 2.39 Nm at 3000 RPM with 20-bit absolute encoder, priced $600–1000. For drives, FANUC A06B-6079-H304 (2.2 kW, 12.5A) compares to Yaskawa SGDV-280A (2.0 kW, 28A). FANUC excels in high-torque density; Yaskawa wins on encoder resolution and drive current capacity per dollar.
| Feature | FANUC Alpha iF 12/4000 (A06B-0213-B001) | Yaskawa Sigma-V 750W (SGMJV-08A3A61) |
|---|---|---|
| Rated Power | 3.0 kW | 0.75 kW |
| Rated Torque | 12 Nm | 2.39 N·m |
| Peak Torque | Not specified | 8.36 N·m |
| Rated Speed | 4000 RPM | 3000 RPM |
| Encoder | 16-bit absolute | 20-bit absolute |
| Voltage | 200V AC | 200V AC |
| Price Range | $2000–3500 | $600–1000 |
| Stock Status | In Stock | Limited Stock |
| Best For | CNC spindles, heavy-duty machining | General automation, robotics, precision positioning |
For amplifier comparison, FANUC A06B-6079-H304 (2.2 kW, 12.5A, 230V) is priced at ¥18,000–22,000, while Yaskawa SGDV-280A (2.0 kW, 28A, fan-cooled) costs $900–1500. The Yaskawa drive delivers more than double the current capacity at roughly 60–70% lower cost—critical for multi-axis systems where drive costs compound.
Pricing & Availability: What's In Stock Now
At zzsl-pcl.com, we stock 20 FANUC and 20 Yaskawa servo products. FANUC in-stock items include A06B-0235-B000 ($2500–3500) and A06B-0162-B175 ($1200–2000). Yaskawa in-stock items include SGDV-5R5A ($450–700) and SGDV-120A ($600–950). FANUC amplifiers range $1500–4000; Yaskawa drives range $300–2800. Limited-stock FANUC motors (A06B-0512-B001, $1500–2500) and Yaskawa motors (SGMPH-04A1A, $400–650) are available now. On-order items (FANUC A06B-6087-H255, Yaskawa SGDL-04AS) ship within 2–3 weeks.
When budgeting for a FANUC or Yaskawa for Servo replacement, consider that FANUC's Alpha-series amplifiers like A06B-6077-H126 (1.0 kW, $1800–2900) and A06B-6077-H130 (2-axis, 2.0 kW, $2500–4000) command premium pricing due to their CNC-specific integration. Yaskawa's Sigma-V drives such as SGDV-180A (1.5 kW, STO-certified, $750–1200) and SGDV-330A (3.0 kW, MECHATROLINK-II, $1100–1800) offer comparable performance at significantly lower price points. For budget-constrained retrofits, Yaskawa's Sigma-II line (SGDM-30ADA, 3.0 kW, $500–800) delivers exceptional value.
Programming & Integration Differences: FANUC vs Yaskawa
FANUC uses proprietary FSSB (Fanuc Serial Servo Bus) communication with CNC-integrated parameters via Series 16/18/21 controllers—migration requires FANUC-specific software (e.g., Servo Guide) and amplifier-motor pairing locks. Yaskawa uses MECHATROLINK-II (Sigma-V drives like SGDV-330A) or analog/pulse-train interfaces (Sigma-II), which integrate easily with third-party PLCs (Siemens, Allen-Bradley) via standard fieldbuses. FANUC offers plug-and-play within FANUC ecosystems; Yaskawa offers open-architecture flexibility. For retrofit projects, Yaskawa's SGDV-1R6A (0.1 kW) supports Position/Speed/Torque modes, simplifying PLC programming.
In practice, this means if you're upgrading an existing FANUC CNC machine, stick with FANUC—the FSSB handshake and parameter mapping are tightly coupled. Swapping in a Yaskawa drive would require a complete control overhaul. Conversely, if you're building a new automation cell with a Siemens or Allen-Bradley PLC, Yaskawa's MECHATROLINK-II and analog interfaces drop in with minimal engineering. The SGDV-2R8A (0.2 kW, universal control mode) is particularly popular for custom machines because it accepts position, speed, and torque commands without reconfiguration.
Which Should You Choose? Decision Guide for Engineers
Choose FANUC if: (1) You operate CNC machines (lathes, mills) with FANUC controls—A06B-6077-H112/H126 amplifiers match perfectly; (2) You need high torque >8 Nm (A06B-0213-B001, 12 Nm); (3) You require 4000 RPM spindle speeds (A06B-0235-B000). Choose Yaskawa if: (1) You're building custom automation with PLCs—SGDV-180A (1.5 kW, STO-certified) ensures safety compliance; (2) You need 20-bit absolute encoders for precision positioning (SGMJV-08A3A61); (3) Budget matters—Yaskawa drives cost 60–70% less at equivalent power (SGDV-5R5A $450 vs FANUC A06B-6077-H126 $1800).
For multi-axis systems, FANUC's A06B-6077-H130 (2-axis, 2.0 kW, $2500–4000) and A06B-6077-H128 (2-axis, 2.0 kW, $2500–4000) consolidate drives into one module, saving panel space but increasing per-axis cost. Yaskawa's modular approach—like pairing SGDV-120A (1.0 kW) with SGDV-280A (2.0 kW)—allows you to size each axis independently, often reducing total drive cost by 40–50%. If you're buying FANUC Servo for a new CNC build, verify that your controller firmware supports the Alpha i series; older Series 0/3 controllers may require the A06B-6087-H255 DC drive module instead.
Frequently Asked Questions (FAQ): Buying, Compatibility & Replacement
Can I mix FANUC motors with Yaskawa drives?
No—FANUC uses FSSB protocol, Yaskawa uses MECHATROLINK/analog; incompatible without converters. Even with adapters, encoder feedback formats differ (16-bit vs 20-bit), making reliable operation virtually impossible.
What's the best FANUC servo for a 5-axis CNC retrofit?
Use A06B-0213-B001 (12 Nm, 4000 RPM) with A06B-6079-H304 amplifier (2.2 kW, 12.5A). For the rotary axes, pair with A06B-0235-B000 (8 Nm, 4000 RPM) and a second A06B-6079-H304.
Are Yaskawa Sigma-II and Sigma-V interchangeable?
No—Sigma-V (SGDV) uses 20-bit encoders; Sigma-II (SGDH/SGDM) uses 17-bit or incremental; adapters required. Motors from one series cannot directly connect to the other's drives without signal conversion.
Do you offer warranty on used FANUC servos?
Yes—all zzsl-pcl.com products include 12-month warranty; in-stock items ship within 24 hours. On-order items like A06B-6087-H255 ship in 2–3 weeks with the same warranty.
How do I replace a FANUC A06B-0512-B001?
Direct replacement is A06B-0512-B4 or A06B-0512-B001#7000; both in stock at $1500–2500. Verify your encoder type (2000 pulse incremental) matches before ordering.
Key Takeaways: FANUC vs Yaskawa Servo
- FANUC dominates high-torque (12 Nm) and high-speed (4000 RPM) CNC applications; Yaskawa leads in encoder resolution (20-bit) and cost-efficiency.
- FANUC amplifiers (A06B-6077 series) cost $1500–4000; Yaskawa drives (SGDV series) cost $300–2800—Yaskawa offers 50–70% savings.
- Compatibility: FANUC is locked to FSSB; Yaskawa supports MECHATROLINK-II, analog, and pulse-train—easier third-party integration.
- Stock status: 40+ units available at zzsl-pcl.com; FANUC in-stock includes A06B-0235-B000, Yaskawa includes SGDV-280A.
- Buy FANUC for CNC machine tools; buy Yaskawa for custom automation and robotics.
- Both brands offer limited-stock options (FANUC A06B-0512-B001, Yaskawa SGMPH-02A1A) at competitive prices.
- For urgent replacements, our on-order items (FANUC A06B-6087-H255, Yaskawa SGDL-04AS) ship in 2–3 weeks.
Need FANUC or Yaskawa Servo parts? Browse our FANUC inventory and Yaskawa inventory. Request a quote → for bulk orders or hard-to-find models.