Fanuc AC Servo Motor A06B-0371-B577
The Fanuc A06B-0371-B577 is an AC servo motor from the FANUC α series, built in the α1/3000 class for precise axis control in machine tools and motion systems requiring stable speed response, repeatable positioning, and compact motor sizing. This configuration features a straight shaft and αI64 pulse coder, making it ideal for replacement applications where original mechanical interface and feedback format must remain consistent.
Key Product Specifications
| Specification |
Value |
| Product Type |
AC Servo Motor |
| Brand |
FANUC |
| Part Number |
A06B-0371-B577 |
| Series |
α series |
| Model Class |
α1/3000 |
| Shaft Type |
Straight shaft |
| Brake |
Without brake |
| Detector |
αI64 pulse coder |
| Rated Output Speed |
3000 min⁻¹ |
| Rated Torque at Stall |
1.0 Nm |
| Rotor Inertia |
0.00036 kg*m² |
| Continuous RMS Current at Stall |
2.2 A (rms) |
| Torque Constant |
0.44 Nm/A (rms) |
| Back EMF Constant |
15.5 V/1000 min⁻¹ |
| Armature Resistance |
1.73 Ω |
| Mechanical Time Constant |
0.010 s |
| Thermal Time Constant |
15 min |
| Static Friction |
0.10 Nm |
| Maximum Allowable Current |
24 A (peak) |
| Maximum Theoretical Torque |
8 Nm |
| Maximum Theoretical Acceleration |
22000 rad/s² |
| Weight |
2.8 kg |
| Protection Rating |
IP55 |
| Recommended Ambient Temperature |
40°C or less |
Product Overview
The A06B-0371-B577 is optimized for applications requiring compact servo motors with predictable dynamic behavior. With relatively low rotor inertia and 1.0 Nm rated stall torque, this motor excels in applications where acceleration, deceleration, and directional response need to remain precise without requiring a larger motor class. This makes it suitable for smaller feed mechanisms, transmission stages, and precision-driven assemblies in established FANUC systems.
Installation and Use Guidelines
FANUC's α series manual emphasizes that motor protection in actual use depends on proper installation practices, not just the IP55 protection rating. Key installation considerations include protecting the motor surface from cutting fluids and lubricants, avoiding coolant routing toward the motor through cables, and using drip loops when connectors face upward. The shaft area requires careful attention during machine integration, as sealing effectiveness depends on environmental conditions and proper lubrication layout.
Frequently Asked Questions
What type of motor is the A06B-0371-B577 according to official FANUC data?
It is a FANUC α series AC servo motor in the α1/3000 class. This variant features a straight shaft with αI64 pulse coder, placing it in the precision servo category for machine tool applications.
Is the A06B-0371-B577 a brake motor?
No. FANUC's official designation table for the α1/3000 family lists brake-equipped versions separately from this straight-shaft non-brake configuration. This distinction is critical for replacement work as it affects mechanical fit and axis holding strategy.
What are the main performance specifications?
Key specifications include 3000 min⁻¹ rated output speed, 1.0 Nm rated torque at stall, 2.2 A RMS current at stall, 24 A peak maximum allowable current, and 2.8 kg weight, as verified from FANUC's official motor data sheet.
Is IP65 confirmed by FANUC for this motor?
No. The official α series manual states the protection form as IP55 for a single motor unit. Real-world resistance to coolant or oil depends on proper cable routing, connector orientation, and installation practices.
What should users verify before ordering this motor as a replacement?
Users should confirm the full part number, shaft form, brake status, detector type, and machine-side coupling arrangement. This model features a straight shaft with αI64 pulse coder, so any machine records showing different configurations should be verified against the original motor nameplate or BOM.
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