YASKAWA HW0380146-F / SGDR-SDB950A01D / HW9380961-D – B-Axis Precision Speed Reducer | Motoman Robot Platform
Engineering Background
The B-axis speed reducer is a mission-critical transmission component within YASKAWA Motoman industrial robot arms. Designed to deliver high torque with minimal backlash, it ensures repeatable positional accuracy across demanding production cycles. This assembly integrates the servo drive unit (SGDR-SDB950A01D) with the mechanical reduction stage, forming a unified B-axis drive module.
Product Positioning
Part numbers HW0380146-F, SGDR-SDB950A01D, and HW9380961-D are cross-referenced OEM identifiers for the same B-axis speed reducer assembly used across multiple Motoman robot generations. This unit is sourced directly from verified YASKAWA supply channels and is suitable for OEM replacement, preventive maintenance, and system refurbishment projects.
Complete Technical Specifications
- Manufacturer: YASKAWA Electric Corporation
- Part Numbers: HW0380146-F / SGDR-SDB950A01D / HW9380961-D
- Component Type: B-Axis Speed Reducer (Integrated Servo Drive Unit)
- Platform Compatibility: YASKAWA Motoman Robot Series
- Axis: B-Axis (Wrist Bend)
- Drive Type: Servo-integrated harmonic or cycloidal reduction stage
- Country of Origin: Japan
- Condition: New / Surplus New (OEM)
- Weight: ~100 g (module only; subject to packaging)
- HS Code: 8483.40 (Gears and gearing; ball or roller screws; gear boxes and other speed changers)
Proven Application Environments
- Automotive body welding and assembly lines
- Electronics PCB handling and precision pick-and-place
- Semiconductor wafer transfer systems
- Palletizing and material handling in logistics
- Arc welding and spot welding robot cells
- Painting and coating automation lines
Engineering Advantages
- Zero-backlash precision: Maintains sub-arc-minute repeatability over extended duty cycles
- Integrated servo-reducer design: Reduces coupling losses and simplifies field replacement
- OEM-matched tolerances: Drop-in compatibility with original Motoman robot arm assemblies
- High torsional rigidity: Sustains dynamic loads during high-speed wrist articulation
- Thermal stability: Engineered for continuous operation in industrial ambient conditions
System Architecture & Signal Flow
The SGDR-SDB950A01D servo drive unit receives motion commands from the Motoman robot controller (DX100/DX200/YRC1000 series) via the servo bus. The drive amplifies current to the B-axis servo motor, which feeds mechanical torque into the HW0380146-F / HW9380961-D reduction stage. The output flange directly drives the B-axis wrist joint, with encoder feedback closing the position loop at the controller level. This closed-loop architecture ensures <0.01 mm path repeatability under rated load.
Sourcing & Quality Verification
- All units are sourced from authorized YASKAWA distributors or verified OEM surplus channels
- Each unit undergoes visual inspection and part-number cross-verification prior to shipment
- Original manufacturer labeling and serial traceability preserved
- Export-compliant packaging with ESD protection where applicable
- Certificate of conformance available upon request for regulated procurement
Procurement Process
- Submit your inquiry with robot model, axis configuration, and required quantity to [email protected]
- Receive stock confirmation and formal quotation within 1 business day
- Review and approve proforma invoice
- Payment via T/T, PayPal, or other agreed terms
- Shipment via DHL / FedEx / UPS with full tracking; lead time 3–7 business days
- Post-delivery technical support available from our engineering team
Technical FAQ
Q: Are HW0380146-F, SGDR-SDB950A01D, and HW9380961-D the same part?
A: Yes. These are cross-referenced OEM part numbers identifying the same B-axis speed reducer / servo drive assembly used across Motoman robot variants. Always verify against your robot’s BOM before ordering.
Q: Which Motoman robot models use this reducer?
A: This unit is used in multiple Motoman series. Please provide your robot model number and we will confirm compatibility before shipment.
Q: Can this unit be repaired rather than replaced?
A: For precision servo-reducer assemblies, OEM replacement is strongly recommended over field repair to maintain positional accuracy and warranty compliance.
Q: What is the lead time for bulk orders?
A: Standard lead time is 3–7 business days for in-stock units. For bulk or scheduled orders, contact us for a dedicated supply agreement.
Q: Do you provide installation support?
A: Yes. Our engineering team can provide technical guidance, wiring diagrams, and parameter reference documents upon request.
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