Description
🔧 Model Overview
A06B-6117-C208 is a FANUC Alpha i (αi) spindle amplifier module in the 6117-C series, designed for ultra high-power CNC spindle applications.
It is used for driving large main spindle or C-axis motors in heavy-duty CNC machines that require very high torque and precise control.
⚙️ Full Technical Description
👉 A06B-6117-C208 = Alpha i Spindle Amplifier (SPM-45 type)
- Series: Alpha i (αi) Spindle System
- Type: AC Spindle Amplifier / Drive
- Model Class: SPM-45 (ultra high-power spindle amplifier)
- Function: Controls spindle rotation, torque, and orientation
⚙️ What It Does
This module:
- Drives very high-power spindle motors
- Controls speed, torque, and spindle orientation
- Supports rigid tapping and synchronous spindle + axis motion
- Interfaces with FANUC CNC via FSSB (fiber optic bus)
👉 Simple explanation:
It converts CNC spindle commands into precise high-torque rotation for heavy-duty machining.
🔩 Key Specifications (Typical)
- Model Type: SPM-45
- Power Class: Ultra high spindle capacity
- Input Voltage: ~283–339 V AC (3-phase)
- Output Voltage: ~200–240 V
- Cooling: Forced-air (fan-cooled)
- Feedback: Spindle encoder supported for precise orientation
🏭 Applications
- Large CNC machining centers
- Heavy-duty CNC lathes
- Gantry or vertical machining systems
- Industrial machines requiring very high spindle torque and precision
🔍 Key Features
- ✔ Ultra high-power spindle amplifier
- ✔ Supports rigid tapping & spindle orientation
- ✔ High precision speed and torque control
- ✔ Reliable for continuous heavy-duty machining
- ✔ Compatible with FANUC αi spindle motors
📊 Position in A06B-6117-C Spindle Series
| Model | Type |
|---|---|
| C205 | SPM-22 (high power) |
| C206 | SPM-30 |
| C207 | SPM-40 |
| C208 | SPM-45 (ultra high power) |
| C209+ | Higher capacity spindle drives |


