industrial servo motor A06B-0113-B175#0008 A06B-0113-B175/0008 AO6B-O113-B175#OOO8

FANUC A06B-0113-B175#0008 | Beta 0.5/3000 AC Servo Motor — Straight Shaft / Keyway / Spring-Applied Brake / A32B Encoder

Part Number: A06B-0113-B175#0008

Base Number: A06B-0113-B175

Manufacturer: FANUC Corporation (Japan)

Product Type: AC Brushless Servo Motor — Beta Series 

A Compact Motor That Holds Position Under Gravity

The A06B-0113-B175#0008 is FANUC's β0.5/3000 — the 0.5 class (0.6 Nm, 0.2 kW) Beta servo motor in the straight-shaft, brake-equipped, keyway configuration. It is one of the smallest motors in FANUC's servo lineup, yet it carries a spring-applied electromagnetic brake that makes it suitable for vertical axes and gravity-loaded mechanisms where the load must be held securely at servo-off or E-stop.

At 1.0 kg, it fits in spaces where an Alpha-series motor of equivalent specification would not. The Beta 0.5/3000 class is typically used on small vertical slides on turning centres and machining centres, Z-axis moves on compact drilling units, and pick-and-place axes in assembly automation.

Spring-applied brake: The brake is on by default — the spring holds the brake pads against the disc whenever the 24V DC brake coil is not energised. Normal servo operation requires the coil to be energised (brake released) before the drive enables. At servo-off, E-stop, or power loss, the coil de-energises and the spring immediately locks the shaft. The 0.65 Nm brake holding torque exceeds the motor's 0.6 Nm rated torque, which is the correct relationship for a holding brake on this motor class.

A32B encoder: This is FANUC's 32K absolute encoder — 32,768 positions per revolution. The motor reports its absolute shaft angle at power-on without needing a homing cycle. Multi-turn position is stored through power cycles using battery backup in the servo amplifier.

#0008 suffix: On FANUC B-suffix motors, the suffix after # specifies the exact combination of shaft, brake, and encoder options. #0008 denotes the straight shaft with keyway on this B175 base variant.

Key Specifications

FAQ

Q1: The brake is not releasing when the axis is enabled. The 24V brake coil supply is confirmed at the connector. Is the brake faulty?

With 24V confirmed at the connector, measure resistance across the brake coil terminals at the motor (24V disconnected). A healthy β0.5/3000 brake coil reads in the range of 30–60 Ω. An open-circuit reading confirms a failed coil. If resistance is within range but the brake still doesn't release, check for mechanical binding in the brake disc — contamination or a seized spring can prevent release even when the coil is energised.

Q2: The #0008 suffix — does it mean anything different from the base A06B-0113-B175?

The base B175 configuration is straight shaft with brake. The #0008 suffix adds the keyway to the straight shaft. Without the suffix, the shaft is smooth. Confirm the hub's bore configuration before ordering — a hub designed for a keyed shaft requires the #0008 variant.

Q3: A32B is described as absolute. Does the axis still need a homing cycle?

The A32B is a single-turn absolute encoder — it knows the shaft angle within one revolution without homing. Multi-turn position (how many full revolutions from the reference) requires battery backup in the servo amplifier to be maintained. If the battery fails and the machine power cycles, the multi-turn counter resets and a homing cycle is needed before normal operation resumes.

Q4: The motor was on a vertical axis. After removal, the shaft has surface marks at the hub contact area. Should it be assessed before reinstalling?

Light contact marks on the straight shaft are cosmetic. If the marks are deep enough to create an uneven seating surface for the hub, the shaft should be evaluated by a motor repair company before refitting. Uneven hub seating on a vertical axis leads to subtle mechanical imbalance, which eventually causes encoder noise and vibration alarms.

Q5: Where are Beta series brake motors sourced?

Through the FANUC aftermarket — surplus, tested refurbished, and motor rebuild services. Confirm the full part number including the #0008 suffix is present on the nameplate. Brake function and encoder operation should both be verified in any acceptance test.