SERVO MOTOR A066-0115-B103#0100 A066-0115-B103/0100 AO66-O115-B1O3#O1OO

Fanuc A06B-0115-B103#0100 | Beta iS Series AC Servo Motor BiS0.5/6000 — 0.35kW, 0.65Nm, 6000RPM, Straight Plain Shaft, B64iA Encoder, IP65, Sealed

Part Number: A06B-0115-B103#0100

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

Model: BiS 0.5 / 6000

Configuration: Straight Plain Shaft (SLK), No Brake, B64iA Absolute Pulsecoder, Sealed (#0100)

Rated Output: 0.35 kW

Stall Torque: 0.65 Nm

Maximum Speed: 6,000 RPM

Motor Voltage: 86 VAC

Rated Current: 2.5 A

Rated Frequency: 400 Hz

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

Encoder: B64iA Absolute Pulsecoder

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

Condition: New / Refurbished / Surplus

Overview

The Fanuc A06B-0115-B103#0100 is a Beta iS series AC servo motor — model BiS 0.5/6000 — in the sealed (#0100) configuration with a straight plain shaft and the B64iA absolute pulsecoder.

At 0.35 kW, 0.65 Nm stall torque, and 6,000 RPM maximum speed, this is one of the smallest motors in the Fanuc servo portfolio, designed for the compact feed axes and auxiliary positioning applications where the full force authority of a larger Beta iS motor is not needed but the precision, absolute position retention, and control integration of the Beta iS platform are.

The #0100 suffix identifies the sealed variant — the motor carries full sealing across the body and the encoder connector, providing protection against the coolant mist, cutting fluid splash, and cleaning water that characterise the machine tool environments where Beta iS motors are most commonly installed.

This is distinct from the standard connector version, where the connector sealing is standard rather than the enhanced sealed configuration of the #0100.

At 6,000 RPM maximum speed, the BiS 0.5/6000 is the high-speed member of the BiS 0.5 torque class — the same 0.65 Nm stall torque at a higher speed ceiling compared to lower-speed variants in the Beta iS range.

The 400 Hz rated electrical frequency and 86V motor voltage reflect the amplifier output characteristics at 6,000 RPM: the Beta i servo amplifier generates variable-frequency variable-voltage three-phase output to drive the motor, with the 200–240V supply to the amplifier converted to 86V motor voltage at the 400 Hz operating frequency corresponding to maximum speed.

Key Specifications

BiS 0.5/6000 — The Beta iS Compact High-Speed Motor

The Beta iS series was designed as the cost-effective, single-axis servo platform in the Fanuc drive ecosystem — compact, self-contained, and compatible with the Beta i servo amplifier for CNC machines where multi-axis Alpha amplifier systems are not needed or where the machine design calls for a simpler drive architecture per axis.

The BiS 0.5/6000 is the smallest standard production motor in the Beta iS family, providing 0.65 Nm stall torque at speeds up to 6,000 RPM.

At 0.35 kW, the application scope is defined by the load: small rotary positioning axes, auxiliary feed mechanisms, tool change components, pallet clamp/unclamp drives, indexing tables in compact machining centres, and similar applications where the primary machine axes use larger motors but the peripheral functions are served by compact, economical drives.

The Beta iS series was widely specified on small to medium CNC machining centres and lathes from the 0i-Mate and 0i series controls onward — machines where cost efficiency at the auxiliary axis level was a design priority without compromising the precision and integration characteristics of the servo system.

The 6,000 RPM ceiling gives the BiS 0.5/6000 a speed advantage over lower-maximum-speed members of the BiS 0.5 family.

For applications where the driven mechanism's natural speed requires higher motor RPM — a high-ratio ball screw on a rapid traverse axis, or a directly coupled rotary stage — the 6,000 RPM ceiling provides the operating range without requiring a gearbox to reach the required table speed.

Straight Plain Shaft (SLK) — Design and Coupling

The SLK (slick/plain) straight shaft configuration means no keyway is machined into the shaft. Torque transmission to the driven component relies entirely on friction between the shaft surface and the coupling hub bore.

At 0.65 Nm stall torque, this is a modest requirement — correctly specified coupling hardware on a clean, properly fitted 0.65 Nm shaft interface will carry the motor's full peak torque without slip under normal operating conditions.

The plain shaft's advantage for small motors is simplicity of assembly. On auxiliary axes and peripheral drives where the motor is often coupled to light mechanisms — toothed belt pulleys, small coupling discs, or encoder drive shafts — the plain shaft can be fitted at any rotational orientation without a keyway alignment step. Hub removal is equally straightforward: loosen the clamping element and the hub slides free, with no key to remove or risk losing.

For applications where the torque loading is cyclic and the direction reverses frequently — a clamp/unclamp axis that sees alternating loading with each cycle — confirming that the coupling's clamping torque specification is adequate for the peak current output of the Beta i amplifier is the prudent design step.

The amplifier's peak current can produce several times the rated stall torque for brief acceleration transients, and the coupling must be sized against this peak rather than the 0.65 Nm rated value alone.

B64iA Absolute Pulsecoder — No Homing, Battery-Free Absolute

The B64iA pulsecoder fitted to the A06B-0115-B103#0100 is the absolute encoder for the Beta iS series. Unlike the biA128 absolute encoder found on the larger Beta iS motors, the B64iA is the encoder platform designed for the compact BiS 0.5 and BiS 1 motor frames.

It provides absolute position retention without a battery — the encoder's position data survives power loss and is available immediately at power-up.

The practical value of battery-free absolute position retention is most apparent on machines with frequent power cycles or machines where power interruptions are realistic: the axis is ready for commanded operation the moment the CNC completes its startup sequence, without traversing to a reference switch.

For a peripheral or auxiliary axis on a production CNC — a tool change axis, a pallet clamp, a sub-spindle — the elimination of the homing traverse after every E-stop or power cycle removes a small but recurring startup overhead.

The absolute encoder also removes the failure mode of lost position after power interruption. An incremental encoder axis that loses power mid-motion requires the operator to manually verify the axis position before resuming — a procedure that adds delay and introduces human error risk.

The B64iA retains position regardless of what happened during power loss, and the CNC resumes with verified position data.

#0100 Sealed Configuration

The #0100 suffix on the A06B-0115-B103 identifies the sealed variant. In Fanuc's Beta iS series, the #0100 sealing configuration provides enhanced protection at the encoder connector junction — the interface between the motor's encoder body and the feedback cable that connects to the servo amplifier.

This connector junction is the most vulnerable point for fluid ingress in any IP65-rated motor because the connector engagement surfaces must be accessible for connection and disconnection, creating a sealing challenge that the motor body itself does not face.

On machine tool installations where the motor body may be exposed to coolant mist or cleaning fluid, the #0100 sealed connector provides the additional assurance that the encoder electronics remain protected even if the connector area is directly exposed to fluid.

The standard (non-sealed) connector relies on correct engagement of the connector locking mechanism for its fluid exclusion; the #0100 adds structural sealing that does not depend on connector locking alone.

When sourcing a replacement A06B-0115-B103, confirming the #0100 suffix matches the original installation is important — the sealed and standard connector variants are not interchangeable with the machine's existing encoder cable connector without also changing the cable connector.

Beta iS Amplifier and CNC Compatibility

The A06B-0115-B103#0100 is driven by the Fanuc Beta i servo amplifier — the βiSVSP or equivalent single-axis amplifier module designed for the Beta iS motor series.

The amplifier receives position and velocity commands from the CNC via the servo interface, drives the motor with three-phase variable-frequency variable-voltage output, and returns encoder feedback to the CNC position control loop.

The Beta iS series and amplifier combination is compatible with Fanuc CNC controls including the 0i-Mate, 0i, 16i, 18i, and 21i series — the control generation that was produced alongside the Beta iS motor family.

On these controls, the motor type parameter must be set to the BiS 0.5/6000 motor ID, and the absolute encoder initialisation must be configured for the B64iA. After parameter setup, the axis operates without homing from every power cycle.

FAQ

Q1: What is the difference between the A06B-0115-B103 and A06B-0115-B103#0100?

Both are the same BiS 0.5/6000 motor with identical electrical and mechanical specifications — rated output, torque, speed, voltage, encoder. The #0100 suffix identifies the sealed connector variant, which provides enhanced fluid protection at the encoder cable connector junction.

The standard version (A06B-0115-B103 without suffix or #7008) has the standard connector engagement. When replacing a motor that has the #0100 configuration in the original machine, the replacement must also carry the #0100 suffix, as the sealed and standard connectors require different cable connectors at the amplifier end.

Q2: Does the B64iA encoder require a battery for absolute position retention?

No. The B64iA pulsecoder on the Beta iS compact motor series retains absolute position without a battery. Position data survives power interruption without any backup power source.

This distinguishes the B64iA from the larger biA128 absolute encoder fitted to the higher-torque Beta iS motors, which uses a battery-backed absolute position system. With the B64iA, there is no battery to monitor, replace, or check for charge condition — the absolute position capability is inherent to the encoder without an external power source.

Q3: What Beta i amplifier is compatible with the A06B-0115-B103#0100?

The BiS 0.5/6000 at 2.5A rated current is compatible with the Fanuc Beta i servo amplifier in the appropriate current class for this motor — the βiSVSP or equivalent single-axis Beta amplifier module. The amplifier must be parameter-configured for the BiS 0.5/6000 motor type and the B64iA absolute encoder.

The Beta i amplifier accepts the 200–240V AC supply and generates the 86V, 400 Hz motor output at maximum speed. 

Confirm that the machine's CNC is compatible with the Beta i amplifier series before ordering — the Beta iS motor system is designed for the 0i-Mate, 0i, 16i, 18i, and 21i CNC generations.

Q4: Can the A06B-0115-B103#0100 replace the A06B-0115-B103 without the #0100 suffix?

Electrically and mechanically, yes — the motor performance is identical. The replacement incompatibility is at the encoder cable connector. The #0100 sealed connector on the motor uses a different mating connector on the encoder cable than the standard (non-#0100) version.

If the existing machine has a standard encoder cable, the cable's motor-end connector will not engage correctly with the #0100 sealed motor connector, and vice versa. Either replace both motor and encoder cable together, or source the exact suffix variant that matches the existing cable.

Q5: What are the most important checks when evaluating a used A06B-0115-B103#0100?

Rotate the shaft by hand to confirm smooth bearing operation — at 6,000 RPM, bearing condition is the primary service life variable in a motor this size, and roughness is detectable by feel well before it becomes mechanically significant.

Inspect the encoder cable connector mating surfaces for corrosion or bent pins, and verify that the #0100 sealed connector body shows no cracking or deformation that would compromise the seal engagement. Measure phase-to-phase winding resistance for balance. 

At 0.35 kW and 2.5A, a bench run-up to 6,000 RPM on a compatible Beta i amplifier with absolute encoder position verified over a full shaft rotation is the correct final check — an encoder that shows incorrect or erratic position feedback during this test indicates encoder degradation rather than a winding issue.