ABB 3HAC021127-003 RV 410F-270.176 – Axis-1 Robot Gear Unit | IRB 4400 Series
Engineering Background
The ABB IRB 4400 is a high-payload industrial robot platform widely deployed in automotive body-in-white welding, material handling, and precision assembly lines. The Axis-1 (base rotation) gear unit is the primary load-bearing reducer in the kinematic chain, directly governing repeatability, torque capacity, and service life of the entire robot arm.
Product Positioning
Part number 3HAC021127-003 is the OEM-specified RV-type cycloidal gear unit for IRB 4400 Axis-1. Sourced through verified ABB-authorized supply channels, this unit is the direct replacement for worn or failed base reducers, restoring factory-rated performance without re-commissioning the robot controller.
Complete Technical Specifications
- OEM Part Number: 3HAC021127-003
- Alternate Reference: RV 410F-270.176
- Gear Type: RV Cycloidal Reducer (Nabtesco-type)
- Reduction Ratio: 270.176 : 1
- Compatible Robot: ABB IRB 4400 (all variants)
- Mounting Axis: Axis-1 (Base Rotation)
- Rated Output Torque: Per ABB IRB 4400 OEM specification
- Weight: 323 g (unit only, without mounting hardware)
- Country of Origin: China (CN)
- Condition: New / Surplus New
- Shipping: Physical goods – requires shipping
Proven Application Environments
- Automotive body-in-white (BIW) spot welding lines
- Press-to-press material transfer and stamping automation
- Palletizing and depalletizing cells
- Machine tending for CNC and injection molding
- Precision assembly and fastening stations
- Foundry and heavy-payload handling environments
Engineering Advantages
- OEM-matched geometry: Drop-in replacement with zero modification to robot structure or controller parameters
- High torsional rigidity: RV cycloidal design minimizes backlash and maintains ±0.05 mm repeatability
- Extended service life: Hardened cycloidal disc and pin-wheel construction rated for multi-year continuous duty cycles
- Thermal stability: Designed for sustained operation across industrial ambient temperature ranges
- Verified traceability: Each unit carries OEM part marking for audit and maintenance record compliance
System Architecture & Signal Flow
In the IRB 4400 kinematic chain, the Axis-1 motor drives the RV 410F input shaft at high speed. The cycloidal reduction stage converts this to a low-speed, high-torque output at a 270.176:1 ratio, rotating the robot base. The output flange interfaces directly with the robot base casting via precision-ground bolt circle. Encoder feedback from the servo motor closes the position loop in the IRC5 controller, with gear unit stiffness being a critical parameter for path accuracy at full payload.
Sourcing & Quality Verification
- Sourced from ABB-authorized distributors and verified surplus channels
- Each unit inspected for OEM part marking, dimensional integrity, and packaging condition prior to dispatch
- Traceability documentation available upon request for MRO and audit compliance
- Export-compliant packaging with ESD protection and moisture barrier
Procurement Process
- Confirm compatibility: verify robot serial number and Axis-1 gear unit part number in ABB documentation
- Place order on Konmask.com – stock availability confirmed at checkout
- Receive order confirmation and estimated lead time within 1 business day
- Unit dispatched with tracking; international shipping available
- Installation support: refer to ABB IRB 4400 Product Manual (3HAC16590-1) for gear unit replacement procedure
Technical FAQ
Q: Is 3HAC021127-003 compatible with all IRB 4400 payload variants (10/45/60 kg)?
A: Yes. The Axis-1 gear unit is common across IRB 4400 variants. Confirm via your robot’s nameplate and ABB spare parts catalog.
Q: Does replacement require IRC5 controller recalibration?
A: Gear unit replacement requires robot recalibration per ABB service procedure. The OEM-matched ratio ensures no controller parameter changes are needed.
Q: What is the expected lead time?
A: In-stock units ship within 1–3 business days. Contact us for urgent requirements.
Q: Can you provide a certificate of conformity or test report?
A: Traceability and inspection documentation is available upon request. Contact support@konmask.com.
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