Fanuc AC Servo Motor A06B-0235-B101
FANUC A06B-0235-B101 AC Servo Motor — AiS8/4000 Straight Shaft CNC Drive Motor
Performance-Optimized Design
The FANUC A06B-0235-B101 delivers reliable performance for CNC feed axes where torque transmission occurs through friction or mechanical interlock, eliminating the need for power-off holding brakes. This straight smooth shaft (SLK) configuration with FANUC i1000 pulse coder provides precise position feedback in industrial applications.
- 2.5 kW rated output with 8 Nm stall torque
- 4,000 RPM maximum speed for high-performance applications
- 3-phase 184V at 267Hz motor voltage specification
- IP65 protection rating for coolant-resistant operation
- i1000 incremental encoder with 1,000 pulses per revolution
The smooth shaft without keyway (SLK) simplifies coupling installation where friction clamping is the primary connection method, eliminating key alignment issues and reducing stress concentration points.
Technical Specifications
| Parameter |
Value |
| Part Number |
A06B-0235-B101 |
| Series |
A06B-0235 |
| Model |
AiS 8/4000 |
| Rated Output |
2.5 kW |
| Stall Torque |
8 Nm |
| Maximum Speed |
4,000 RPM |
| Motor Voltage |
184V, 3-phase / 267Hz |
| Amplifier Input |
200-240V AC, 50/60Hz |
| Shaft Type |
Straight, smooth (no keyway) — SLK |
| Encoder |
i1000 incremental pulse coder |
| Electromagnetic Brake |
Not included |
| Protection Rating |
IP65 |
| Insulation Class |
F |
| Repair Eligible |
Yes |
SLK Shaft Configuration Benefits
The SLK designation indicates a smooth cylindrical output shaft without keyway cuts, optimized for driven couplings relying on radial clamping force. This configuration works ideally with zero-backlash clamp hubs, shrink disc couplings, and similar friction-locking designs. The absence of keyways eliminates stress risers at the shaft surface, providing enhanced durability for high-cycle bidirectional torque applications.
Configuration Note: The B101 (smooth shaft), B201 (keyed straight shaft), and B001 (taper shaft) share identical AiS8/4000 motor core specifications. Selection depends on your machine's coupling design requirements.
i1000 Encoder System Compatibility
The i1000 incremental pulse coder delivers 1,000 pulses per revolution, representing the standard feedback resolution for earlier FANUC servo control generations. This encoder communicates effectively with current FANUC αi series amplifiers and CNC systems when properly configured.
Installation Note: Verify amplifier configuration for i1000 encoder compatibility before installation. Parameter mismatches between encoder type and amplifier settings may generate axis alarms that resemble hardware failures.
Application Specifications
The A06B-0235-B101 serves as an ideal feed axis motor for CNC machine tools in these applications:
- Friction-type clamp or shrink disc couplings (smooth shaft configuration)
- Applications without power-off holding brake requirements
- Machine control systems configured for i1000 encoder compatibility
- Horizontal or counterbalanced axis loads without gravity-induced position holding needs
This motor suits X and Y axis installations on vertical machining centers, rotary table drives on smaller machines, and feed axis drives on CNC lathes with pre-αiA encoder generation architectures.
Frequently Asked Questions
Q1: What is the difference between the A06B-0235-B101 and the B201 or B001?
All three variants are AiS8/4000 motors with identical electrical performance (2.5kW, 8Nm, 4000RPM). The distinction lies in shaft geometry: B101 features a smooth straight shaft, B201 includes a keyed straight shaft, and B001 utilizes a taper shaft. Select based on your machine's specific coupling design requirements.
Q2: Does the i1000 encoder work with current FANUC αi amplifiers?
Yes — FANUC αi amplifiers support i1000 encoder types when amplifier parameters are correctly configured. Replacing motors with different encoder types requires updating amplifier parameters to prevent axis alarms during startup.
Q3: Why would someone choose the smooth shaft (SLK) over a keyed shaft?
Smooth shafts optimize performance with zero-backlash clamp-style couplings that grip the shaft circumferentially. This configuration simplifies installation by eliminating key alignment requirements and removes stress concentration points at keyway slots. Use SLK variants when original machine couplings were designed for smooth shaft operation.
Q4: Is this motor eligible for repair if it fails?
Yes — the A06B-0235-B101 is repair-eligible. Common service procedures include bearing replacement, encoder replacement, and winding testing. Repair typically offers cost-effective alternatives to full replacement for most failure modes excluding severe physical damage or winding burnout.
Q5: What αi servo amplifier module is required for this motor?
The AiS8/4000 motor pairs with a FANUC αi SVM rated for the motor's 11A stall current operating on 200-240V AC input. Specific SVM models depend on single-axis or multi-axis module requirements and total drive system configuration. Verify existing amplifier current ratings and motor parameter settings before motor replacement.
The FANUC A06B-0235-B101 serves as an OEM replacement servo motor. Confirm shaft type, encoder compatibility, and amplifier parameter settings against your machine documentation before installation.
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