The FANUC A06B-0371-B575 is an Alpha 1/3000 AC servo motor used for precision motion control in compatible FANUC CNC and industrial machine systems. This configuration combines a straight motor shaft, no holding brake, and an A64 absolute pulse coder for position and speed feedback.

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• Testing video provided upon request

Product Details

Brand: FANUC
Part Number: A06B-0371-B575
Alternative Format: A06B0371B575
Product Type: AC Servo Motor
Motor Model: Alpha 1/3000
Motor Output: 0.3 kW / 0.4 hp
Output Speed: 3,000 min⁻¹
Rated Torque at Stall: 1.0 Nm
Shaft Type: Straight Shaft
Holding Brake: Not Included
Feedback Detector: A64 Absolute Pulse Coder
Product Family: A06B-0371
Application: Compatible FANUC Alpha Servo Systems
Availability: Contact us for current stock and lead time

Servo Motor Function

The A06B-0371-B575 receives controlled power from a compatible FANUC servo amplifier and produces accurate rotary movement for a machine axis. Its integrated A64 absolute pulse coder returns position and speed information to the servo-control system.

The straight-shaft design must match the original machine coupling and mechanical installation. Shaft diameter alone is not sufficient to confirm compatibility.

B575 Configuration Clarification

FANUC motor-designation information identifies the main A06B-0371 configurations as follows:

• A06B-0371-B075: Taper shaft, no brake, A64 pulse coder
• A06B-0371-B575: Straight shaft, no brake, A64 pulse coder
• A06B-0371-B577: Straight shaft, no brake, I64 pulse coder
• A06B-0371-B675: Straight shaft with brake, A64 pulse coder

These motors may share the same Alpha 1/3000 frame and basic performance rating, but differences in the shaft, brake and feedback detector can prevent direct interchangeability.

Modification-Suffix Notice

Some units carry an additional suffix, including #7000, #7008, #0008, #0075, #C000 or #U008. Depending on the suffix, the motor may have different nameplate markings, approvals, sealing or shaft-keyway details.

Before ordering, compare the complete FANUC number printed on the motor nameplate. A suffix specifying a keyway or IP-rated modification should not be assumed to apply to every A06B-0371-B575 motor.

Compatibility Check

Please confirm the following information:

• Complete motor number and modification suffix
• Straight-shaft dimensions and keyway arrangement
• A64 absolute pulse-coder requirement
• No-brake motor configuration
• Power and feedback connectors
• Mounting flange and coupling dimensions
• FANUC servo-amplifier model
• CNC parameters and machine manufacturer’s specification

Replacement and Support

The A06B-0371-B575 may be used to replace a confirmed faulty motor associated with pulse-coder alarms, inaccurate positioning, abnormal bearing noise, overheating, winding or insulation faults, damaged connectors, or shaft damage.

The feedback cable, motor power cable, servo amplifier, mechanical coupling and machine load should also be inspected before replacement.

REACO CNC supplies tested FANUC servo motors with warranty support, testing-video service and worldwide express delivery. Please provide a clear nameplate photo when requesting a quotation so the complete motor configuration can be verified.