Fanuc A06B-0141-B075 AC Servo Motor
Part Number: A06B-0141-B075
Series: ALPHA AC Servo Motor
Model: AC12 / 2000
Condition: New / Refurbished / Exchange Available
Product Overview
The Fanuc A06B-0141-B075 is a high-performance AC servo motor from Fanuc's ALPHA series, specifically the AC12/2000 model. Recognizable by its distinctive red end cap, this motor delivers precision motion control for small to medium-sized CNC machine tools. It provides an optimal balance between compact design and continuous torque output, making it ideal for milling machines, lathes, and machining centers requiring consistent, repeatable axis performance.
Technical Specifications
| Parameter |
Value |
| Rated Output Power |
2.1 kW |
| Continuous Torque |
12 Nm |
| Rated Current |
8.8 A |
| Phases |
3-Phase |
| Rated Voltage |
155 V |
| Rated Frequency |
133 Hz |
| Maximum Speed |
2,000 RPM |
| Shaft Configuration |
Straight (no keyway) |
| Brake |
None |
| Ingress Protection |
IP67 |
| End Cap Color |
Red (ALPHA Generation) |
Design & Construction Features
Engineered for production-floor reliability, the AC12/2000 motor operates at 2,000 RPM maximum speed, making it well-suited for direct-coupled ballscrew drives and feedrate-critical contouring axes. The 12 Nm continuous torque rating ensures high axis stiffness under load without requiring oversized drive hardware.
Factory-fitted IP67 sealing provides superior protection against temporary immersion, with shaft seals, connector entry points, and motor housing all rated to withstand harsh environments. This extends service intervals in coolant-heavy applications where standard motors would show premature bearing contamination or winding degradation.
The brake-free design simplifies wiring and reduces overall motor weight, making it appropriate for horizontal axes or applications where the servo drive maintains position through active torque control.
Compatibility & Applications
The A06B-0141-B075 pairs with Fanuc ALPHA series servo drives (SVM/SVU modules) and is compatible with Fanuc 0, 0i, 16, 18, 21, and related CNC control platforms depending on drive configuration.
Commonly used for axis feeds (X, Y, or Z) on small vertical machining centers, turning centers, and wire EDM machines, this motor was standard on Fanuc's RoboDrill platform and third-party builders using Fanuc drive trains.
Important: When sourcing replacements, verify the feedback device type (Pulsecoder model) and connector pinout against your existing motor, as variants within the 0141 family may use different encoder specifications affecting drive parameter settings.
Industry Significance
Legacy CNC machines with Fanuc ALPHA drives remain productive assets in manufacturing facilities worldwide. The A06B-0141-B075 features extensive documentation and service history, with refurbished and surplus units actively circulating in industrial MRO markets.
Its straightforward construction—brake-free, IP67 sealed, standard straight shaft—facilitates easy servicing, rewinding, and replacement without major mechanical modifications. Maintaining a spare A06B-0141-B075 is a practical strategy for minimizing unplanned downtime in shops operating older Fanuc-equipped machines.
Frequently Asked Questions
What servo drive is compatible with the Fanuc A06B-0141-B075?
This motor is designed for use with Fanuc ALPHA series servo amplifiers (SVM or SVU modules). Compatibility depends on the specific CNC control generation—typically Fanuc Series 0, 0i, 16, 18, or 21 systems. Always confirm the drive's motor parameter settings match the AC12/2000 ratings before commissioning.
Does the A06B-0141-B075 include an encoder, and what type is it?
Yes. ALPHA series motors ship with an integrated Pulsecoder (encoder) mounted at the rear. The specific Pulsecoder variant determines resolution and serial/parallel feedback protocol. Verify the Pulsecoder part number on the motor nameplate before ordering a replacement to ensure drive compatibility.
Can this motor be used on a vertical axis without a brake?
It can, but this requires the servo drive to maintain active holding torque when the axis is stationary. For vertical or gravity-loaded axes, a brake variant (such as the B076 or B176 suffix models) is generally recommended for safety and to prevent axis drop during E-stop or power loss events.
What does the IP67 rating mean for this motor in a machine tool environment?
IP67 indicates the motor is dust-tight and can withstand temporary immersion in water up to 1 meter for 30 minutes. In practical CNC terms, this means the motor is well-protected against coolant splashing, mist, and incidental fluid contact—but it should not be continuously submerged or exposed to high-pressure direct spray without additional protection.
How do I identify if a used A06B-0141-B075 is still serviceable?
Check the motor nameplate for the correct part number and inspect the shaft seal for wear or hardening. Measure winding resistance across all three phases—values should be balanced and within specification. Spin the shaft by hand to feel for bearing roughness. If the Pulsecoder has logged errors or the motor has been overloaded, a full bench test or rewind evaluation by a qualified servo repair facility is advisable before reinstallation.
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