FANUC A06B Series Modules: A06B-2115-B805 2007-T299A660-4005-T080 A97L-0218-088610ia Robot Two-Axis Speed Reducer —

Technical Dossier

Product Details And Specifications

FANUC A06B Series: Comprehensive Module Range and Technical Overview

The FANUC A06B series represents one of the most widely deployed servo motor and robot drive component families in global heavy industry. Installed across petrochemical refineries, nuclear power plant maintenance robots, automotive body welding lines, and precision machining centers, the A06B designation covers FANUC's αi-series and βi-series AC servo motors along with their associated mechanical drive assemblies. The specific unit A06B-2115-B805 / 2007-T299A660-4005-T080 / A97L-0218-0886/10ia is a two-axis speed reducer assembly engineered for FANUC robot arms (R-2000iB, M-710iC, and related platforms), providing the gear reduction interface between the servo motor shaft and the robot joint axis. These assemblies are found in continuous-duty environments where mean time between failure (MTBF) requirements exceed 40,000 hours.

The Evolution of A06B Architecture

The A06B numbering convention was established by FANUC in the early 1980s as part of the FANUC AC Servo System architecture. The series has passed through four distinct generations. The first generation (A06B-0xxx) used analog velocity command interfaces and resolver feedback, compatible with FANUC Series 0 and Series 6 CNC controllers. The second generation introduced digital serial communication (FSSB — FANUC Serial Servo Bus) and transitioned to optical fiber links between the CNC and servo amplifier, covering the A06B-2xxx motor range paired with αSV and βSV amplifiers. The third generation (αi and βi series, mid-2000s) brought higher encoder resolution (1,000,000 pulse/rev on αi motors), integrated thermal protection, and compatibility with Series 30i/31i/32i controllers. The fourth and current generation adds functional safety (Dual Check Safety, DCS) and EtherCAT-based communication for integration with FANUC's CRX collaborative robot platform. Compatibility between generations is not automatic: A06B-2xxx motors with Ai encoders require αi-series amplifiers (A06B-6xxx); substituting earlier amplifier types will result in encoder communication faults. For robot-specific assemblies such as the A06B-2115-B805, the mechanical interface (flange pattern, shaft diameter, gear ratio) is robot-model-specific and is not interchangeable across robot families without engineering verification.

A06B Full Catalog & Functionalities (SKU List)

Servo Motors — αi Series

• A06B-2115-B805: αiF 22/3000 servo motor, 22 kW, 3000 rpm, flange-mount, robot axis drive
• A06B-2116-B805: αiF 30/2000 servo motor, 30 kW, 2000 rpm, heavy-duty robot J1/J2 axis
• A06B-2243-B100: αiS 4/4000 servo motor, 4 kW, 4000 rpm, standard flange, CNC axis
• A06B-2253-B100: αiS 8/3000 servo motor, 8 kW, 3000 rpm, high-inertia load axis
• A06B-2265-B100: αiS 22/1500 servo motor, 22 kW, 1500 rpm, large-frame CNC spindle assist
• A06B-2282-B100: αiS 40/2000 servo motor, 40 kW, 2000 rpm, heavy milling axis

Servo Motors — βi Series

• A06B-2075-B103: βiS 4/4000 servo motor, 4 kW, compact frame, general-purpose CNC
• A06B-2085-B103: βiS 8/3000 servo motor, 8 kW, mid-frame, lathe/machining center
• A06B-2047-B100: βiS 0.5/5000 servo motor, 500 W, 5000 rpm, small-axis positioning
• A06B-2063-B103: βiS 2/4000 servo motor, 2 kW, 4000 rpm, auxiliary axis drive

Robot Mechanical Drive Assemblies

• A06B-2115-B805 2007-T299A660-4005-T080 A97L-0218-0886/10ia: Two-axis speed reducer assembly, R-2000iB/M-710iC compatible, integrated grease port
• A06B-2120-B605: αiF 40/2000 motor with integrated brake, robot J3 axis assembly
• A06B-2130-B605: αiF 55/1500 motor assembly, large robot base axis (J1), with resolver backup

Encoder & Feedback Units

• A97L-0218-0886/10ia: Pulsecoder αA1000S, 1,000,000 pulse/rev, absolute serial encoder, robot-grade
• A860-2000-T301: Separate detector unit for αi pulsecoder, DIN-rail mount, CNC feedback
• A860-2020-T301: High-resolution absolute pulsecoder, 16-bit multi-turn, αi motor compatible

Amplifier Modules (A06B-6xxx — paired with above motors)

• A06B-6140-H006: αi SV 6A servo amplifier, single-axis, FSSB interface
• A06B-6141-H015: αi SV 15A servo amplifier, single-axis, 200 VAC input
• A06B-6160-H002: αi SV 2A servo amplifier, compact, βi motor compatible

Sourcing Hard-to-Find & Obsolete A06B Series Parts

The A06B-2115-B805 and related robot drive assemblies entered the mature phase of their product lifecycle as FANUC transitioned robot platforms to the R-2000iD and M-710iD lines. OEM new-stock availability from FANUC distributors is constrained, with lead times frequently exceeding 16–24 weeks for mechanical assemblies. DriveKNMS maintains a dedicated inventory of A06B series components sourced from decommissioned production lines, certified refurbishment programs, and authorized surplus channels. For obsolete encoder units such as the A97L-0218-0886 series, DriveKNMS provides encoder swap services where the pulsecoder is replaced with a functionally equivalent unit and the motor assembly is re-tested to FANUC factory torque and speed specifications before shipment. All units are supplied with full traceability documentation. Emergency same-day dispatch is available for in-stock items to minimize unplanned downtime on production-critical robot cells.

Quality Control for the A06B Range

Robot-grade servo motor and speed reducer assemblies require test procedures that go beyond standard motor bench testing. DriveKNMS applies the following protocol to all A06B robot drive units: (1) Insulation resistance test at 500 VDC between winding and frame (minimum 100 MΩ); (2) No-load run-in at rated speed for 30 minutes with vibration monitoring (ISO 10816-3 Class II limits); (3) Encoder communication verification via FANUC FSSB loopback — confirming absolute position data integrity and alarm-free operation; (4) Gear reducer backlash measurement using a calibrated torque arm fixture, compared against FANUC's published backlash tolerance for the specific robot axis; (5) Brake holding torque test (where applicable) at 110% of rated holding torque; (6) Final thermal imaging scan after load run to confirm no abnormal heat distribution in windings or bearing housings. Units that fail any parameter are quarantined and not shipped. Test records are retained for 5 years and are available to customers on request.