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Product Overview
The FANUC A06B-0205-B100 is an AC servo motor from the FANUC alpha iF series, identified as model αiF2/5000 with an a1000 encoder and straight shaft configuration. It is rated at approximately 0.75 kW, with a rated speed of 4,000 rpm and maximum speed of 5,000 rpm. The motor is intended for closed-loop motion control in FANUC CNC machine tools and related automated equipment, where accurate positioning, controlled acceleration, and repeatable torque response are required. FANUC technical data lists a 2.0 Nm stall torque and a maximum torque of 8.3 Nm under the specified test conditions.
Technical Specifications — A06B-0205-B100
| Parameter | Value |
|---|---|
| Product Model | A06B-0205-B100 |
| Manufacturer | FANUC |
| Product Type | AC Servo Motor |
| Motor Series | αiF2/5000 |
| Rated Output | 0.75 kW |
| Rated Speed | 4,000 rpm |
| Maximum Speed | 5,000 rpm |
| Stall Torque | 2.0 Nm |
| Maximum Torque | 8.3 Nm |
| Encoder | A1000 |
| Shaft Configuration | Straight shaft |
| Stall Current | 3.5 A rms |
| Armature Resistance | 1.1 Ω |
| Rotor Inertia | 0.000526 kg·m² |
| Maximum Servo Amp Current | 20 A peak |
| Cooling | Application dependent |
| Mounting | FANUC machine-tool motor mounting |
| Weight | Approx. 4.3 kg |
| Typical Interfaces | Motor power and encoder connections |
| Manual Reference | FANUC B-65262EN |
FANUC technical specifications list the 0.75 kW output, 4,000 rpm rated speed, 5,000 rpm maximum speed, 2.0 Nm stall torque, and approximately 4.3 kg motor weight.
FANUC A06B-0205-B100
Key Features and Benefits — A06B-0205-B100
- αiF2/5000 servo motor architecture for FANUC CNC systems.
- 0.75 kW rated output for compact machine-axis applications.
- 4,000 rpm rated operating speed with 5,000 rpm maximum speed.
- A1000 encoder supports closed-loop servo positioning.
- Straight-shaft construction for compatible mechanical couplings.
- Suitable for CNC feed-axis and automated motion applications.
- Designed to operate with compatible FANUC servo amplifier and control parameters.
Related Models
A06B-0205-B110: Related αiF2/5000 motor configuration with a different ordering suffix and application configuration.
A06B-0205-B100#0100: Sealed/IP67-related configuration of the same basic motor family, with environmental protection differences.
A06B-0205 series: FANUC αiF2/5000 servo motors with variations in encoder, brake, shaft, and environmental configuration.
αiF series: FANUC AC servo motor family used across CNC and factory-automation motion systems.
Installation and Maintenance — A06B-0205-B100
Before installation, verify the servo amplifier model, encoder compatibility, motor cable, shaft dimensions, coupling arrangement, and CNC parameter set. Confirm that the motor is mechanically aligned before applying power.
Inspect bearings, connectors, shaft condition, and insulation during maintenance. After replacement, verify encoder feedback, rotation direction, servo alarms, and axis reference position. Do not interchange motors solely because they share the same basic frame or power rating; FANUC suffix codes can identify meaningful electrical and mechanical differences. Personally, I would compare the complete nameplate and machine parameter set before commissioning a replacement.
Product Warranty — A06B-0205-B100
Warranty conditions depend on supplier and product condition. For new, unused surplus, refurbished, or repaired units, confirm the motor revision, encoder configuration, test status, serial-number traceability, and warranty period before purchase.
The FANUC A06B-0205-B100 is a compact αiF2/5000 AC servo motor intended for precise CNC motion control, with specifications suited to established FANUC machine-tool platforms.
