Fanuc A06B‑0075‑B403: High‑Torque CNC Servo Motor for Precision Automation

Key Specifications & Features

Continuous Torque: 3.0 Nm; Peak Torque: 9.0 Nm
Rated Speed: 3000 rpm nominal for consistent throughput
Encoder: 20‑bit optical absolute encoder enabling sub‑micron positioning accuracy
Housing & Protection: Die‑cast aluminum body with IP65 rating for resistance against coolant and debris
Drive Compatibility: Works with Fanuc αi/αiA series drives supporting sinusoidal commutation and PWM control
Insulation & Thermal Class: Class F insulation for high‑temperature endurance
Shaft & Bearings: Hardened stainless steel shaft paired with dual angular contact bearings for smooth, low‑vibration operation

SKU A06B‑0075‑B403 Categories All Products, FANUC

Additional Information

Part Number: A06B‑0075‑B403
Description: AC Servo Motor – High-Torque, Absolute Encoder
Product Series: A06B‑0075

Availability: In Stock – Contact for Lead Time
Core Exchange: Required
Repair: Yes – Full Repair Services Available

The Fanuc A06B‑0075‑B403 is a high-performance AC servo motor built for precision CNC machining and robotic automation. As part of Fanuc’s renowned A06B‑0075 series, this motor delivers a powerful mix of torque stability, rotational accuracy, and environmental protection—making it a top-tier solution for modern industrial applications like multi-axis turning, high-load milling, and pick-and-place robotics.

This unit is available for purchase, but due to fluctuating demand, we recommend calling to confirm lead time prior to placing your order.

A core exchange is required with this product. When you order the A06B‑0075‑B403, you’ll need to return your existing motor core—ensuring market sustainability and reducing total lifecycle costs.

For customers managing long-term assets, repair services are available for this model. This allows you to restore performance without purchasing a full replacement—ideal for preventive maintenance cycles and cost control.

Technical Highlights

Specification	Details
Continuous Torque	3 Nm – optimized for consistent cutting forces
Peak Torque	9 Nm – built for rapid acceleration and deceleration
Speed Rating	3000 rpm – supports stable cycle times
Feedback System	20-bit absolute optical encoder – zero-homing, precision recall
Housing Protection	IP65 – sealed die-cast aluminum body for shop-floor resilience
Bearings	Dual angular-contact – vibration-resistant at high speeds
Insulation Class	Class F – reliable under thermal stress

Performance & Design Excellence

From its low-inertia rotor for quick response, to its precision-wound copper coils that reduce cogging and heat buildup, the A06B‑0075‑B403 is purpose-built for demanding production lines. The robust stainless steel shaft withstands mechanical shock, while the motor’s streamlined winding and frame layout optimize airflow for passive cooling efficiency.

Why Choose the A06B‑0075‑B403?

✅ Superior Position Control for complex contours and automated motion paths
✅ Plug-and-Play Integration with Fanuc 30i/31i controls and αi series drives
✅ Reduced Downtime thanks to IP65 protection in dusty or wet environments
✅ Torque Stability under continuous load, ideal for spindle and Z-axis control
✅ Repairable & Exchangeable, offering lifecycle cost savings

Internal Resource

📘 Need help selecting the right servo motor? Check out our Servo Motor Sizing Guide for expert recommendations based on your machine load and duty cycle.

FAQ – A06B‑0075‑B403

Q: How does this compare to the B103 variant?
A: The B403 offers ~20% more continuous torque, making it better suited for heavy tooling setups or robotic joints under load.

Q: Is active cooling required?
A: Standard ambient conditions are sufficient for most operations. Forced-air or liquid cooling kits can be installed for extended duty cycles or high-heat zones.

Q: What safety standards are met?
A: When paired with Fanuc-certified drives, this motor supports ISO 13849 compliance for machine safety protocols.

Final Thoughts

The Fanuc A06B‑0075‑B403 AC Servo Motor is a reliable, high-performance solution for manufacturers who demand speed, stability, and long-term reliability. With core exchange options and repair support, it’s a future-proof choice for CNC and robotic automation environments.