GE A06B-0238-B605

Product Name: Fanuc A06B-0238-B605 — AC Servo Motor (Alpha Series)

Product Introduction:
The A06B-0238-B605 is a Fanuc AC servo motor from the Alpha series (A06B-0238 series). It is a high-performance, brushless DC servo motor designed for CNC machine tool spindle and axis drive applications. This model is a standalone motor unit without built-in encoder (requires separate encoder).

Category: GE

Description

Model Series: Fanuc Alpha Series — A06B-0238

Technical Specifications:

Parameter	Value
Motor Type	AC Servo Motor (Brushless)
Rated Output Power	3.0 kW
Rated Speed	2,000 rpm
Rated Torque	14.3 Nm
Max Speed	3,000 rpm
Peak Torque	42.9 Nm (3× rated, 0.5s)
Encoder	Separate (αi series encoder required — not built-in)
Resolver	Built-in (for motor commutation)
Insulation Class	Class F (155°C)
Protection Rating	IP65 (with connector cap)
Cooling Method	Forced air cooling (fan-cooled)
Shaft Diameter	55 mm
Shaft Length	80 mm (with keyway)
Weight	38 kg
Dimensions (W×H×L)	218 × 218 × 340 mm (approx.)
Connector	Military-style connector (A06B-6047 series)

Functional Features:

High torque-to-inertia ratio for fast acceleration
Built-in resolver for commutation
Designed for continuous operation in CNC environments
Compatible with Fanuc αi series amplifiers (A06B-6000 series)
High rigidity construction for precision machining
Low vibration, low noise operation

Performance Parameters:

Acceleration Torque: 42.9 Nm (peak, 0.5 seconds)
Thermal Time Constant: 45 minutes
Moment of Inertia: 0.11 kg·m² (rotor)
Ambient Operating Temp: 0°C to +40°C (with derating above 40°C)
Ambient Storage Temp: -20°C to +60°C
Humidity: 20% to 80% RH (no condensation)

Structural Features:

Cast aluminum housing with precision-machined mounting flange
55mm diameter shaft with standard keyway (14 × 9 × 50mm)
6-pin resolver connector + power connector
IP65 sealing with gland connector caps
Mounting: Foot-mounted (4×M10 holes) or flange-mounted

Working Principle:
Three-phase brushless DC motor. The αi series servo amplifier sends 3-phase AC current to the motor windings. The built-in resolver provides rotor position feedback to the amplifier for commutation timing. A separate αi series encoder (e.g., A02B-0236 series) mounts on the rear shaft for position feedback to the CNC controller. The amplifier performs current, speed, and position control loops at 8 kHz sampling rate.

Advantages:

High power density (3kW in compact package)
Excellent thermal characteristics
Proven reliability in CNC applications worldwide
Wide compatibility with Fanuc CNC controls (0i, 30i, 31i, 32i series)
IP65 protection for coolant/dust resistance

Applicable Industries:

CNC milling machines
CNC lathes
CNC grinding machines
CNC boring machines
Robot axes (Fanuc robots)
Injection molding machines

Installation Requirements:

Mount on rigid base with 4×M10 bolts, torque 25 Nm
Align shaft coupling within 0.05mm TIR
Use shielded motor cable (Fanuc specified) — max 50m
Connect resolver cable and encoder cable separately
Ensure amplifier parameter settings match motor specifications (Pr. 7, Pr. 8, Pr. 20)

Usage Precautions:

Do not operate without encoder — motor will run open-loop (dangerous)
Verify resolver cable phasing before first power-on
Set correct motor model number in CNC parameters
Do not exceed 3,000 rpm continuous speed
Replace brush seals every 8,000 hours (maintenance interval)

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