Yaskawa MS165 Speed Reducer Modules: HW1382455-C & Full Series

Technical Dossier

Product Details And Specifications

Yaskawa MS165 Series: Comprehensive Speed Reducer Range and Technical Overview

The Yaskawa MS165 is a high-payload industrial robot platform rated at 165 kg, deployed extensively across global heavy industries including petrochemical plants, nuclear facility maintenance operations, offshore oil refinery automation lines, and large-scale automotive body welding cells. The MS165 series occupies a critical position in Yaskawa Motoman's mid-to-high payload robot lineup, bridging the gap between medium-duty handling robots and ultra-heavy foundry robots. Its speed reducer assemblies — including the HW1382455-C (cross-referenced as A97L-0318-0239#430Z-126) — are precision harmonic drive or RV-type gear units integrated into each joint axis. These components are subject to scheduled replacement intervals in continuous-operation environments and represent one of the highest-demand spare part categories for MS165 fleet operators worldwide.

The Evolution of MS165 Architecture

The Yaskawa Motoman MS165 belongs to the MS-series robot family, which succeeded the earlier UP-series and ES-series heavy-payload platforms. The MS-series introduced a redesigned wrist structure with improved moment-of-inertia tolerance and a revised cable routing architecture that reduced harness wear in high-cycle applications. Early MS165 units (pre-2010) used first-generation RV reducer assemblies with part numbers in the HW138xxxx-A suffix range. Mid-generation units (2010–2016) transitioned to the -B and -C suffix variants, reflecting updated gear ratio tolerances and improved sealing standards for wash-down environments. Current production and long-term support units carry -C and -D suffix designations. Compatibility between suffix generations is axis-specific and must be verified against the robot's serial number and axis configuration before substitution. The MS165 platform remains in active deployment at facilities with 10–20 year equipment lifecycles, making aftermarket reducer sourcing a persistent operational requirement.

MS165 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components associated with the Yaskawa MS165 robot platform, organized by functional category. Each entry reflects a discrete mechanical or electrical assembly used in axis drive, power distribution, or control integration.

Speed Reducer / Gear Unit Assemblies (Axis Drive)

• HW1382455-C: S-axis (axis 1) RV-type speed reducer unit, 165 kg payload class, -C revision
• HW1382456-C: L-axis (axis 2) speed reducer assembly, matched pair with HW1382455-C for base rotation
• HW1382457-C: U-axis (axis 3) gear reducer, upper arm drive, high-torque output flange
• HW1382458-B: R-axis (axis 4) wrist rotation reducer, compact harmonic drive format
• HW1382459-B: B-axis (axis 5) wrist bend reducer, integrated bearing race design
• HW1382460-B: T-axis (axis 6) tool flange reducer, low-backlash output for precision tooling
• HW9280869-A: Grease nipple and seal kit for RV reducer maintenance, MS165 compatible

Servo Motor Units (Axis Drive)

• SGMRS-44ANA-YR11: S/L-axis AC servo motor, 4.4 kW, 2000 rpm, absolute encoder
• SGMRS-22ANA-YR11: U-axis servo motor, 2.2 kW, flange-mount, MS165 upper arm
• SGMRS-09ANA-YR11: R/B/T-axis wrist servo motor, 0.9 kW, compact frame

Servo Amplifier / Drive Modules (Control Cabinet)

• CACR-SR44BB1AF: S/L-axis servo amplifier, 44 A continuous, MECHATROLINK-II interface
• CACR-SR22BB1AF: U-axis servo amplifier, 22 A, matched to SGMRS-22ANA motor
• CACR-SR09BB1AF: Wrist-axis servo amplifier, 9 A, three-axis wrist drive cabinet module

Controller / CPU Modules (DX100 / DX200 Platform)

• JANCD-MCP01-E: Main CPU board for DX100 controller, MS165 system integration
• JANCD-MIF01-E: Machine interface board, I/O signal routing, DX100/DX200
• JANCD-YSF21-E: Safety function board, functional safety category 3, DX200
• JZNC-YRK01-1E: Robot control rack assembly, DX100 platform, 6-axis configuration

Power Supply Units

• JZRCR-YPU01-1: Primary power supply unit, DX100 controller, 3-phase 400 V input
• JZRCR-YPS01-1: Servo power supply module, regenerative braking circuit, DX100

Sourcing Hard-to-Find & Obsolete MS165 Parts

The MS165 platform entered its mature lifecycle phase approximately 2018–2020, with Yaskawa progressively transitioning new installations to the HC-series and GP-series platforms. However, the installed base of MS165 robots in continuous-operation facilities — particularly in petrochemical and nuclear maintenance environments — remains substantial, and operators routinely require replacement reducers, servo motors, and controller boards on 3–7 year maintenance cycles. DriveKNMS maintains a dedicated inventory program for MS165 lifecycle support, covering both current-production -C/-D suffix reducer variants and earlier -A/-B suffix units that are no longer available through standard distribution channels. All sourced units are cross-referenced against Yaskawa's internal part supersession records to ensure dimensional and performance compatibility. For facilities operating MS165 fleets under long-term service agreements, DriveKNMS offers consignment stock arrangements and priority allocation for critical-path components including the HW1382455-C and its axis-matched counterparts.

Quality Control for the MS165 Range

Speed reducer assemblies for the MS165 series undergo a structured inspection protocol prior to dispatch. Each unit is subject to dimensional verification of the output flange interface, backlash measurement at rated preload, and seal integrity pressure testing. Servo motor units are bench-tested for encoder signal integrity, winding resistance balance across all three phases, and insulation resistance at 500 V DC. Controller boards including JANCD-series CPU and interface modules are tested on a live DX100/DX200 rack with axis simulation to verify communication bus integrity and I/O channel function. All test records are retained and available upon request for traceability documentation required by nuclear and petrochemical facility procurement standards.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.