AC Servo Motor A06B-0116-B403#0100 A06B-0116-B403#0100 A06B-0116-B403#0100

Fanuc A06B-0116-B403#0100 | Beta iS Series AC Servo Motor BiS1/6000 — 0.5kW, 1.2Nm, 6000RPM, 24V Brake, b64ia Encoder, Sealed

Part Number: A06B-0116-B403#0100

Series: Fanuc Beta iS (βiS) Series AC Servo Motor

Model: BiS 1 / 6000

Configuration: Straight Plain Shaft (SLK), 24V DC Spring-Applied Brake, b64ia Absolute Pulsecoder, Sealed (#0100)

Rated Output: 0.5 kW

Stall Torque: 1.2 Nm

Maximum Speed: 6,000 RPM

Motor Voltage: 172 VAC

Rated Current: 1.8 A

Maximum Current: 2.6 A

Rated Frequency: 0–400 Hz

Amplifier Input: 200–240 VAC, 50/60 Hz

Phase: 3-Phase

Compatible CNC: 0i, 0i-Mate, 16i, 18i, 21i and compatible

Condition: New / Refurbished / Surplus

Overview

The Fanuc A06B-0116-B403#0100 is a Beta iS series AC servo motor — model BiS 1/6000 — in the sealed (#0100), brake-equipped configuration.

At 0.5 kW, 1.2 Nm stall torque, and 6,000 RPM maximum speed with a 24V DC spring-applied brake, it combines the high-speed compact positioning capability of the BiS 1/6000 motor class with the mechanical holding and enhanced environmental protection that specific installation requirements demand.

The #0100 sealed configuration and the 24V DC brake together define the application context this motor is built for.

The sealing — enhanced protection at the encoder connector junction — suits installations where the motor is exposed to coolant mist, cleaning fluid, or the general wet environment of a machine tool working zone.

The 24V brake addresses the application class where the motor drives an axis that must not move when the servo is de-energised: a vertical feed axis without a mechanical counterbalance, an inclined conveyor axis, or any positioning axis where drift under gravity or residual load would cause position loss or safety hazard when servo power is removed.

The step up from the BiS 0.5/6000 (A06B-0115 series) to the BiS 1/6000 (A06B-0116 series) doubles the torque output from 0.65 Nm to 1.2 Nm while maintaining the same 6,000 RPM speed ceiling and the same compact Beta iS physical format.

At 1.8A rated and 172V motor voltage, the BiS 1/6000 operates on a three-phase power supply through the Beta i servo amplifier in the 200–240V AC input class — a straightforward electrical interface that integrates directly with the standard industrial supply without additional transformers or conversion equipment.

Key Specifications

BiS 1/6000 — Position in the Beta iS Family

The Beta iS series covers the compact, single-axis servo motor class in Fanuc's product range. The BiS 1/6000 sits above the BiS 0.5/6000 (A06B-0115 series, 0.65 Nm) and below the heavier Beta iS motors with larger torque ratings.

At 1.2 Nm stall torque and 6,000 RPM maximum speed, it occupies the small-axis positioning segment: light rotary tables, auxiliary conveyor positioning drives, tool change sub-axes, pallet clamp mechanisms, and similar functions where the primary machine axes are served by larger Alpha or Alpha i motors but peripheral axes require precise, integrated servo control without the complexity of a full multi-axis amplifier cabinet.

The 0.5 kW output at 6,000 RPM reflects the electrical power input at maximum speed. At lower speeds — the 0 to 3,000 RPM range where most positioning applications operate — the motor delivers the full 1.2 Nm stall torque continuously, with the 6,000 RPM ceiling available for rapid traverse moves where short-duration maximum velocity is required.

Torque doubles from the BiS 0.5/6000 to the BiS 1/6000 for the same physical format and amplifier class.

For applications where load analysis confirms that 0.65 Nm rated torque is insufficient but 1.2 Nm is adequate — a slightly heavier mechanism, a longer moment arm, a higher friction environment — the BiS 1/6000 provides the step up without changing the motor mounting interface, the amplifier type, or the encoder feedback system.

24V DC Brake — Beta iS Standard, CNC Safety Architecture

The 24V DC spring-applied brake is the standard brake voltage across the Fanuc Beta iS series.

This matches the 24V DC control circuit voltage that CNC machine tool panels universally provide: the same supply that powers indicator lamps, relay coils, and PLC digital outputs also provides the brake release voltage.

No separate brake power supply, no special circuit, no additional cabinet wiring — the 24V brake release connects directly to the machine's existing 24V DC bus through the appropriate switching element in the servo enable/disable sequence.

Spring-applied means the default state is engaged. When 24V DC is applied to the brake coil, it overcomes the spring force and releases the shaft to rotate freely.

When 24V DC is removed — at servo disable, E-stop, power loss, or servo alarm — the spring immediately re-engages the brake and holds the shaft. 

This fail-safe architecture means the brake protects against the consequences of every power removal event, not just programmed stops.

For the BiS 1/6000 in a vertical axis application, this matters on every machine cycle. During machining, the servo is enabled, the brake is released, and the motor controls the axis. At programmed axis stop, the CNC sequences: decelerate to zero velocity, enable brake, disable servo.

The brake holds the axis at the commanded position during the dwell. On restart, the sequence reverses: enable servo, release brake, proceed.

The brake engagement before servo disable ensures the axis does not drift during the handover from servo torque to brake torque — the motor holds position, the brake engages on the held position, the servo releases.

The critical voltage note: the 24V DC specification is the Beta iS standard, not interchangeable with the 90V DC brake used on Alpha series and some Beta iSR robot motors. Connecting a 24V brake to a 90V supply burns the coil.

Connecting a 90V brake to a 24V supply produces insufficient force to release the brake — the motor runs against continuous brake drag. Always verify the brake supply voltage at the connector before commissioning or replacing a braked servo motor.

Plain Straight Shaft (SLK) — Application at 1.2 Nm

The SLK plain shaft without keyway transmits all torque through friction between the shaft surface and the coupling hub bore. At 1.2 Nm stall torque, this is a modest mechanical requirement — well within the capability of correctly installed coupling hardware at the 14mm shaft diameter typical of the BiS 1/6000 format.

The plain shaft's value is in assembly flexibility.

On peripheral and auxiliary axes, where the motor often drives light mechanisms through timing belt pulleys or small coupling discs, the hub can be positioned at any axial location and any rotational orientation before clamping.

There is no keyway alignment requirement, no angular reference between motor shaft and coupling, and no key to source, fit, and risk losing during maintenance access.

For applications where torque loading is cyclic with frequent direction reversals — a clamp/unclamp axis cycling many times per hour — the clamping torque must be specified against the amplifier's peak current output, not the rated 1.2 Nm stall torque alone.

The Beta i amplifier can deliver current corresponding to several times the rated torque during acceleration transients.

The coupling's friction torque capacity must accommodate this peak without slip.

When this condition cannot be guaranteed with a plain shaft, the keyed shaft variant (B403#0100 does not carry a key; the B403K or B203 equivalent with keyway designation does) provides the positive rotational interlock that eliminates slip regardless of clamping torque condition.

#0100 Sealed Variant and b64ia Absolute Encoder

The #0100 suffix identifies the sealed configuration — enhanced sealing at the encoder cable connector junction specifically.

The standard encoder connector relies on correct engagement of the connector locking ring for its fluid exclusion. 

The #0100 adds structural sealing at the connector interface that provides protection independent of the connector locking mechanism, making the sealed variant appropriate for machine tool environments where the connector area may be directly exposed to coolant mist or cleaning fluid.

The b64ia pulsecoder provides absolute position retention without a battery. Position data survives power interruption and is available immediately at power-up — no homing traverse, no reference return, no startup delay on the braked axis.

For a brake-equipped motor, this combination is operationally significant: the axis position is known accurately at startup, the brake can be released with confidence that the commanded position matches the physical axis position, and any discrepancy between commanded and actual position detected at startup indicates a problem rather than normal homing uncertainty.

The b64ia is the compact absolute encoder designed for the BiS 0.5 and BiS 1 motor frame.

It provides the same operational benefit — battery-free absolute position — as the biA128 encoder fitted to larger Beta iS motors, but scaled for the physical constraints of the smaller motor body.

FAQ

Q1: What is the difference between A06B-0116-B403 and A06B-0116-B103?

Both are BiS 1/6000 sealed motors with b64ia absolute encoders and plain straight shafts. The B403 carries a 24V DC spring-applied brake; the B103 does not. Electrically and mechanically, they are otherwise identical — same rated output, speed, voltage, current, amplifier compatibility, and encoder interface.

The B403 is specified for axes requiring mechanical holding when the servo is off; the B103 for axes where holding is not required. Installing the brake-free B103 on an axis originally equipped with the B403 removes the holding function and may create a safety or quality issue on vertical or inclined axes.

Q2: The motor has a 24V DC brake — where does the 24V supply come from?

The 24V DC brake supply comes from the machine's control panel 24V DC bus, switched through the servo amplifier's brake release output or a dedicated brake interlock relay in the machine's safety circuit.

The Beta i servo amplifier controls the brake release signal as part of the servo enable/disable sequence: brake releases when the servo is enabled and ready, brake engages before the servo is disabled.

The 24V supply wiring connects to the motor's brake terminals through the power connector — confirm the pinout against the machine's wiring diagram before installation.

Q3: Does the b64ia encoder require a battery for absolute position?

No. The b64ia pulsecoder retains absolute shaft position without any backup battery. This distinguishes it from encoder systems where a battery must be maintained, monitored, and periodically replaced to preserve absolute position through power loss.

With the b64ia, position data is inherent to the encoder without an external power source — there is no battery circuit to check, no battery alarm to respond to, and no risk of position loss on battery discharge.

Q4: What Beta i servo amplifier is required for the A06B-0116-B403#0100?

The BiS 1/6000 at 1.8A rated (2.6A maximum) is driven by the Fanuc Beta i servo amplifier in the appropriate current class — the βiSVSP or equivalent single-axis module for the Beta iS motor series.

The amplifier receives 200–240V AC input and generates the variable-frequency 172V output to drive the motor.

The amplifier must be parameter-configured for the BiS 1/6000 motor type, the b64ia absolute encoder interface, and the 24V brake interlock sequence.

Confirm the machine's CNC generation — 0i, 0i-Mate, 16i, 18i, or 21i — supports the Beta i amplifier series before procurement.

Q5: What are the key pre-installation checks for the A06B-0116-B403#0100?

Verify the brake supply voltage at the motor's brake terminals before connecting — confirm 24V DC is available and switched by the correct interlock.

Test brake function before mechanical installation: apply 24V DC and confirm the shaft rotates freely with no drag, remove 24V and confirm the shaft is held firmly. Inspect the #0100 sealed connector body for any cracking or deformation that would compromise the seal.

Rotate the shaft by hand for smooth bearing operation. Confirm the coupling hub bore and clamping specification are appropriate for the BiS 1/6000's 1.2 Nm rated and peak torque, then install with a calibrated torque wrench to the coupling manufacturer's specification.