Industrial Robot Joint Reducer Solution – YASKAWA HW0388706-A / HW0388708-A / HW0388710-A | Motoman Series
Where This Product Is Used
The YASKAWA HW0388706-A, HW0388708-A, and HW0388710-A are precision joint reducers (harmonic drive units) designed for YASKAWA Motoman industrial robot arms. These components are critical in high-cycle automation environments where positional accuracy and torque repeatability are non-negotiable.
- Arc & Spot Welding Cells – Maintains sub-millimeter TCP accuracy across thousands of weld cycles in automotive body shops and fabrication lines.
- Material Handling & Palletizing – Delivers consistent joint torque for high-payload pick-and-place and end-of-line palletizing systems.
- Assembly Automation – Enables precise part insertion and fastening in electronics, appliance, and mechanical assembly lines.
- Machine Tending – Supports reliable CNC load/unload operations with repeatable joint positioning over extended production shifts.
- Painting & Coating Lines – Used in wrist/arm joints of painting robots where smooth, backlash-free motion is essential for uniform coating.
- Semiconductor & Clean Room Handling – Applied in controlled environments requiring low-vibration, high-precision articulation.
Technical Specifications
| Parameter | Details |
|---|---|
| Part Numbers | HW0388706-A / HW0388708-A / HW0388710-A |
| Manufacturer | YASKAWA Electric Corporation |
| Series / Platform | Motoman Robot Series |
| Component Type | Robot Joint Reducer (Harmonic Drive Unit) |
| Application | Industrial Robot Arm Joint Axis |
| Compatible Robots | YASKAWA Motoman (model-specific — confirm axis before ordering) |
| Weight (approx.) | 600 g |
| Condition | New / Surplus New |
Note: HW0388706-A, HW0388708-A, and HW0388710-A differ in reduction ratio and torque rating. Please confirm your robot model and axis number before ordering to ensure correct fitment.
Why Engineers Specify This Model
- OEM-Grade Precision – Manufactured to YASKAWA’s original tolerances; direct drop-in replacement with no recalibration of robot parameters in most cases.
- Zero-Backlash Design – Harmonic drive mechanism eliminates backlash, preserving TCP repeatability (±0.08 mm or better) over the service life.
- High Torque Density – Compact form factor delivers high reduction ratios (typically 50:1–160:1) in a lightweight package, critical for robot payload efficiency.
- Long Service Life – Sealed grease lubrication and hardened flex-spline construction support multi-year MTBF in 24/7 production environments.
- Proven Field Reliability – Widely deployed across automotive, electronics, and general manufacturing sectors globally.
Complete System Bill of Materials
When replacing or servicing a YASKAWA Motoman robot joint, the following components are typically required alongside this reducer:
- YASKAWA Servo Motor (axis-specific, e.g., SGM series)
- Motor coupling / input shaft adapter
- Joint bearing set
- Reducer grease (YASKAWA-specified, e.g., Harmonic Grease SK-1A or equivalent)
- Axis brake unit (if applicable)
- Encoder cable & connector harness
- Robot controller (DX200 / YRC1000 / FS100 — system-level)
Contact us for bundled BOM sourcing to minimize downtime.
Compliance & Industry Standards
- Manufactured under ISO 9001 quality management system
- Compliant with RoHS directives (confirm lot-specific documentation on request)
- Designed to meet ISO 10218 industrial robot safety requirements (system-level)
- CE marking applicable to integrated robot systems (YASKAWA system-level certification)
- Compatible with SEMI S2 guidelines for semiconductor equipment environments (application-dependent)
Quality Assurance & Sourcing
- Authorized & Surplus Channel Sourcing – Parts are sourced from verified YASKAWA authorized distributors and certified surplus channels with full traceability.
- Incoming Inspection – Each unit undergoes visual inspection, dimensional verification, and packaging integrity check prior to dispatch.
- Authenticity Guarantee – We supply only genuine YASKAWA components. Counterfeit parts are rejected at source.
- Documentation Available – Test reports, packing lists, and country-of-origin certificates available upon request.
- Warranty – 90-day warranty against manufacturing defects under normal operating conditions.
How to Source This Part
- Confirm your robot model and axis – Identify which axis (S, L, U, R, B, T) requires replacement to match the correct part number (HW0388706-A, HW0388708-A, or HW0388710-A).
- Submit your inquiry – Contact us via email or phone with your robot model, serial number, and required quantity.
- Receive quotation & lead time – We respond within 1 business day with pricing, availability, and estimated delivery.
- Order & ship – Secure checkout available online. Express DHL/FedEx international shipping supported. Export documentation provided for cross-border orders.
Application-Specific FAQ
Q: What is the difference between HW0388706-A, HW0388708-A, and HW0388710-A?
A: These three part numbers correspond to different joint axes or robot models within the Motoman series, each with a specific reduction ratio and output torque rating. Please provide your robot model and axis number for exact identification.
Q: Can I install this reducer without recalibrating the robot?
A: In most cases, yes — as a direct OEM replacement, the robot’s zero-point calibration is preserved. However, YASKAWA recommends performing a mastering (zero-point calibration) procedure after any joint reducer replacement as best practice.
Q: Do you supply the grease required for installation?
A: Yes, we can supply YASKAWA-specified reducer grease as part of a service kit. Please request this when placing your order.
Q: What is the lead time for international orders?
A: In-stock units ship within 1–3 business days. International delivery via DHL/FedEx Express typically takes 3–7 business days depending on destination and customs clearance.
Q: Is this part compatible with DX200 and YRC1000 controllers?
A: The reducer itself is a mechanical component independent of the controller. Compatibility is determined by the robot arm model and axis, not the controller generation.
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