Kawasaki R2AA Series AC Servo Motors

Technical Dossier

Product Details And Specifications

Kawasaki R2AA Series AC Servo Motors: Comprehensive Module Range and Technical Overview

The Kawasaki R2AA Series represents a well-established line of AC servo motors deployed extensively across global heavy industry sectors including petrochemical plants, automotive assembly lines, steel mills, and precision manufacturing facilities. Engineered to interface with Kawasaki's proprietary servo drive controllers, R2AA units are characterized by their high torque density, low cogging, and compatibility with incremental and absolute encoder feedback systems. These motors have accumulated significant installed base in Asia-Pacific and European industrial automation environments, making long-term spare parts availability a critical operational concern for maintenance engineers and procurement teams.

The R2AA Series covers a broad torque and speed range, with frame sizes and winding configurations suited to both high-cycle robotic joint applications and continuous-duty machine tool spindle support. Their mechanical interface follows standardized IEC and JIS flange dimensions, enabling drop-in replacement in many legacy installations without mechanical modification.

The Evolution of R2AA Series Architecture

The R2AA Series was developed as part of Kawasaki's second-generation servo platform, succeeding earlier R1 and RA-series motors that used brush-type or early brushless designs with analog resolver feedback. The R2AA architecture introduced digital incremental encoder interfaces (typically 2500 ppr or 8192 ppr), enabling compatibility with Kawasaki's D-series and later E-series servo amplifiers.

Early R2AA variants (circa late 1990s to early 2000s) used single-turn absolute encoders with battery-backed retention, a design that introduced field maintenance requirements around battery replacement cycles. Mid-generation revisions introduced multi-turn absolute encoders with extended retention and improved EMI shielding on the encoder cable interface. Later production runs incorporated enhanced winding insulation rated to Class F (155°C), improving thermal margin in high-ambient installations.

Compatibility note: R2AA motors are not directly interchangeable with Kawasaki's subsequent R3AA or RA-series without amplifier parameter reconfiguration. Engineers migrating from R2AA to current-generation equivalents must verify encoder protocol compatibility and regenerative braking capacity of the paired drive unit.

R2AA Series Full Catalog & Functionalities (SKU List)

The following SKUs represent confirmed models within the Kawasaki R2AA AC Servo Motor series, classified by frame size and rated output. Each entry reflects a distinct mechanical or electrical specification variant:

R2AA06020LCPKZ: 200W, 3000 rpm, 60mm frame, incremental encoder, keyway shaft, IP65 seal
R2AA06040LCPKZ: 400W, 3000 rpm, 60mm frame, standard flange, incremental encoder, IP65
R2AA08075LCPKZ: 750W, 3000 rpm, 80mm frame, incremental encoder, straight shaft, IP65
R2AA08100LCPKZ: 1.0 kW, 3000 rpm, 80mm frame, absolute encoder option, IP65
R2AA10150LCPKZ: 1.5 kW, 2000 rpm, 100mm frame, incremental encoder, keyway shaft
R2AA10200LCPKZ: 2.0 kW, 2000 rpm, 100mm frame, standard flange, IP65 seal
R2AA13200LCPKZ: 2.0 kW, 1500 rpm, 130mm frame, low-speed high-torque configuration, IP65 — this listing
R2AA13300LCPKZ: 3.0 kW, 1500 rpm, 130mm frame, absolute encoder, keyway shaft, IP65
R2AA13400LCPKZ: 4.0 kW, 1500 rpm, 130mm frame, high-torque winding, IP65
R2AA18350LCPKZ: 3.5 kW, 1000 rpm, 180mm frame, heavy-duty flange, IP65
R2AA18550LCPKZ: 5.5 kW, 1000 rpm, 180mm frame, absolute encoder, reinforced bearing
R2AA18750LCPKZ: 7.5 kW, 1000 rpm, 180mm frame, high-inertia load rating, IP65
R2AA22110LCPKZ: 11.0 kW, 1000 rpm, 220mm frame, large-frame servo, IP65, keyway shaft
R2AA22150LCPKZ: 15.0 kW, 1000 rpm, 220mm frame, absolute encoder, heavy-duty bearing
R2AA22185LCPKZ: 18.5 kW, 750 rpm, 220mm frame, ultra-low-speed high-torque, IP65
R2AA06020FCPKZ: 200W, 3000 rpm, 60mm frame, with holding brake, incremental encoder
R2AA08075FCPKZ: 750W, 3000 rpm, 80mm frame, with holding brake, IP65

Sourcing Hard-to-Find & Obsolete R2AA Series Parts

The Kawasaki R2AA Series has entered the mature-to-end-of-life phase of its product lifecycle. Kawasaki Precision Machinery has progressively reduced factory support for R2AA units, with several frame sizes and encoder variants no longer available through standard distribution channels. Lead times from OEM sources, where stock exists, frequently exceed 20–40 weeks.

DriveKNMS maintains a dedicated inventory program for R2AA Series motors, sourcing units through verified industrial surplus channels, decommissioned equipment recovery, and authorized repair networks. All units are inspected prior to listing. For end-users operating legacy Kawasaki servo systems in continuous production environments, DriveKNMS provides:

• Direct unit replacement with matched encoder type and shaft configuration
• Cross-reference support for identifying compatible R2AA variants when the exact model is unavailable
• Repair and rewind assessment for high-frame units (130mm and above) where replacement cost is prohibitive
• Documentation support including wiring diagrams and parameter sheets for paired Kawasaki amplifier models

Quality Control for the R2AA Series Range

R2AA Series motors present specific inspection challenges due to their encoder assembly design and winding insulation age. DriveKNMS applies the following test protocol to all R2AA units processed through its facility:

• Winding resistance and insulation resistance (IR) test: Measured phase-to-phase and phase-to-ground at 500V DC. Minimum acceptable IR: 100 MΩ. Units below threshold are flagged for rewind assessment.
• Encoder signal verification: Incremental encoder outputs (A, B, Z channels) verified at rated speed using a servo analyzer. Absolute encoder battery voltage and multi-turn data retention confirmed where applicable.
• Bearing noise and runout inspection: Shaft runout measured with dial indicator. Axial and radial play assessed against OEM tolerance. Bearings replaced as standard on units with operating hours exceeding documented thresholds.
• No-load run test: Motor operated at 500 rpm, 1000 rpm, and rated speed for minimum 10 minutes per stage. Current draw, temperature rise, and vibration signature logged.
• Brake function test (where fitted): Holding torque verified against rated specification. Release voltage and response time measured.
• Nameplate and configuration verification: Motor frame size, winding code, encoder type, and shaft configuration cross-referenced against order requirements before dispatch.