Get now the A06B-0166-B675 — Atlantechdrives provides this FANUC AC Servo Motor model αM 30/3000, a 3.8 kW high-torque brushless servo motor from the FANUC Alpha M series, designed for precision axis drives in large CNC machine tools and high-inertia load applications. Tapered shaft with integrated electromagnetic brake and A64 encoder. Express worldwide delivery with 12-month warranty.
What Is the A06B-0166-B675?
The A06B-0166-B675 is a FANUC AC Servo Motor belonging to the Alpha M (αM) series — FANUC’s high-inertia servo motor family specifically engineered for machine tool axes with heavy moving masses, such as large saddles, cross slides, and rotary tables in horizontal boring machines, large machining centres, and heavy-duty CNC lathes. The αM designation distinguishes this motor from the standard αS (speed-optimised) and αiF (force-optimised) families: αM motors have a higher rotor inertia designed to match large load inertias, reducing the inertia ratio between motor and load and ensuring stable servo response without oscillation on axes with inherently high mechanical inertia. The model αM 30/3000 encodes the key performance parameters: 30 Nm stall torque and 3000 RPM rated speed. The -B675 suffix in FANUC’s A06B part numbering convention indicates a tapered shaft (SLK) configuration, an integrated electromagnetic brake, and A64 series pulse coder encoder. The motor produces 3.8 kW continuous output at rated conditions, operating at 3-phase 134V nominal, 200–230 VAC amplifier input, 133 Hz electrical frequency at rated speed, with IP65 ingress protection and Insulation Class F. This motor is now discontinued by FANUC as part of the legacy Alpha (non-i) series product family, making quality surplus units the primary source for maintenance of machines where this motor was originally installed.
Key Technical Specifications
- Part Number: A06B-0166-B675
- Motor Series: FANUC Alpha M (αM) — 200V
- Motor Model: αM 30/3000
- Continuous Output Power: 3.8 kW
- Stall Torque: 30 Nm
- Rated Speed: 3000 RPM (2000 RPM peak per some variants)
- Rated Current (continuous): 17 A
- Motor Voltage: 134 V (at 3-phase)
- Voltage at 1000 RPM: 59.24 / 72.5 V
- Amplifier Input: 200–230 VAC
- Electrical Frequency at Rated Speed: 133 Hz
- Shaft Type: Tapered (SLK)
- Brake: Integrated electromagnetic brake
- Encoder: A64 pulse coder (64,000 PPR absolute)
- Ingress Protection: IP65
- Insulation Class: F
- Cooling: Natural convection
- Mounting: Flange mount
- Operating Temperature: 0–40°C
- Storage Temperature: -20–60°C
- Compliance: CE certified
- Weight: approx. 38.56 kg
- Status: Discontinued — available as surplus/replacement
- Manufacturer: FANUC Ltd., Japan
Alpha M Series Design Philosophy and Applications
The FANUC Alpha M series was developed to address a specific problem in large CNC machine tools: when the load inertia significantly exceeds the motor inertia, the servo system becomes prone to resonance, oscillation, and instability during acceleration and deceleration. By using a motor with inherently higher rotor inertia, the αM series reduces the effective inertia ratio (load inertia / motor inertia), allowing standard servo tuning parameters to achieve stable, accurate motion even on axes with heavy workholding fixtures, large rotary tables, or massive saddle assemblies. The αM 30/3000 is particularly suited for the following axis types: rotary table B-axes on horizontal machining centres (where workpiece and fixture mass is variable and potentially high), Z-axis (vertical) or W-axis (quill) on horizontal boring mills, the X or Z axis of large CNC turning centres with heavy bar feeders or steady rests, and pallet changer carrier systems on flexible manufacturing cells. The motor is paired with a FANUC SVM1-130 (A06B-6096-H106) servo module in the Alpha i amplifier family, or the equivalent Alpha series SVU/SVM unit, with the axis parameter set for the αM 30 motor type in the CNC controller.
Maintenance Tips
The A06B-0166-B675 incorporates an electromagnetic brake that is released by applying 24 VDC to the brake connector and engaged (braking) when power is removed — this is a fail-safe design. A common maintenance error is testing the brake by attempting to rotate the shaft with the brake engaged, which risks damage to the brake friction disc. Always apply 24 VDC to the brake release circuit before rotating the shaft during installation or alignment. The A64 pulse coder on this motor is the older absolute encoder variant (Red Cap style) using a battery-backed absolute position memory — if the motor has been stored without the encoder battery connected for more than 6 months, the absolute position data will be lost and a zero-return (reference point re-establishment) will be required after installation. Check the encoder battery condition as the first step when commissioning a replacement motor. When replacing the A06B-0166-B675 on a tapered shaft coupling, the key dimension to verify is the taper fit — FANUC Alpha M motors use the standard JIS B 1012 tapered shaft, and the coupling bore must match precisely to avoid fretting corrosion or slippage under the high torque loads this motor generates.
Frequently Asked Questions
Q: What is the difference between the A06B-0166-B675 and other A06B-0166 variants such as B000 or B100?
A: The A06B-0166 series is the αM 30/3000 motor family. The -B675 variant has a tapered shaft (SLK), electromagnetic brake, and A64 encoder. The -B000 variant has a straight shaft, no brake, and standard encoder. The -B100 variant has a straight shaft, no brake, and A1000 encoder. Select the variant that matches your machine’s shaft coupling type, brake requirement, and encoder compatibility — do not substitute a B000 for a B675 if the machine requires the brake for axis clamping during M-code operations or power-off holding.
Q: What FANUC alarms indicate failure of the A64 encoder (pulse coder) on the A06B-0166-B675?
A: Encoder failure on this motor generates alarms in the SV3xx range on FANUC i-Series controllers: SV-364 (APC: battery voltage zero), SV-365 (APC: battery low — replace encoder backup battery immediately), SV-366 (APC: pulse coder communication error indicating a hardware encoder fault), and SV-369 (APC: pulse count error). SV-364 and SV-365 are battery alarms requiring only battery replacement; SV-366 and SV-369 typically indicate that the encoder or its cable must be replaced.
Q: Which servo amplifier module is compatible with the A06B-0166-B675?
A: The αM 30/3000 motor (17 A rated current) is compatible with the FANUC SVM1-130 servo amplifier module (A06B-6096-H106 for Alpha i series). For older Alpha series systems, the equivalent SVU1-130 (A06B-6089-H106) or the appropriate Alpha servo amplifier unit is used. Consult the FANUC Alpha Series Descriptions manual (GFZ-65142E) and your machine tool builder’s electrical drawings to confirm the correct amplifier specification.
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