Application Scenarios:An automotive spot-welding cell running three ABB IRB 6600 robots in 24/7 production began experiencing increasing backlash, abnormal wrist noise, and TCP drift on one manipulator after years of high-cycle operation. Disassembling and re-shimming the wrist onsite proved risky and time-consuming. The maintenance team sourced and installed the ABB 421-1-10479-390 complete output shaft configuration assembly. Because the 421-1-10479-390 is a factory-matched, pre-loaded, and pre-lubricated unit, it restored original wrist rigidity, eliminated excess backlash, and returned the robot’s repeatability to specification within a single shift. The 421-1-10479-390 solved the pain point of unreliable field reassembly, reduced overhaul time by more than 60%, and prevented extended line stoppage—demonstrating its critical role in planned preventive maintenance (PPM) and corrective joint rebuilds for high-duty-cycle robotic lines.h2
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 421-1-10479-390 |
| Manufacturer | ABB Robotics (ABB AG / ABB Sweden) |
| Product Category | Complete Output Shaft Configuration / Wrist Joint Overhaul Assembly |
| Typical Application | Robot wrist output stage — usually Axis 4 or Axis 5 of IRB 6600 / IRB 6650 / IRB 7600 (verify by S/N) |
| Assembly Contents | Hardened & ground output shaft / flange, precision angular-contact bearings, radial oil seals, shims, locknuts (exact BOM per kit release) |
| Shaft Material | High-strength alloy steel, induction hardened & precision ground |
| Lubrication | Factory pre-filled with ABB-specified robotic gear grease |
| Matching Requirement | Must confirm against robot Model + Serial Number (S/N) + Axis position — NOT cross-series universal |
| Replacement Level | Major overhaul / joint rebuild — requires robot arm disassembly & zero calibration post-install |
| Weight (Approx.) | 8 – 18 kg depending on axis variant (typical for wrist shaft assemblies) |
| Documentation | Supplied with ABB service manual reference & installation torque specs |
h2 Technical Principles and Innovative Values:
- Factory-Validated Tolerance Matching: The 421-1-10479-390 integrates shaft, bearings, and seals that are pre-selected and pre-loaded to ABB’s original tolerance bands, eliminating the risk of mismatched bearing preload or incorrect shaft-bearing fit that commonly causes premature wear or excessive backlash in field-built repairs.
- Pre-Lubricated & Contamination-Controlled Build: Each ABB 421-1-10479-390 assembly is greased with the correct type and quantity of ABB robotic lubricant in a controlled environment, preserving internal cleanliness and extending service life from day one of reinstallation.
- Restores Original Kinematic Accuracy: By replacing the entire worn wrist output stage as a single unit, the 421-1-10479-390 re-establishes the manipulator’s designed stiffness and TCP repeatability (typically ±0.05 mm ~ ±0.1 mm depending on robot model), critical for welding, machining, and precision material-handling applications.
h2 Application Cases and Industry Value:Case 1 – Automotive Body Shop Robot Wrist Rebuild (IRB 6600):A Tier-1 stamping & weld plant scheduled a preventive rebuild of an IRB 6600 wrist showing early bearing rumble on Axis 5. Using the ABB 421-1-10479-390 output shaft configuration, the certified service team completed the swap and re-calibration in one planned downtime window. Post-rebuild laser tracker verification confirmed TCP repeatability back within original spec. Unplanned stoppages due to wrist accuracy drift were eliminated for the subsequent 3-year cycle.
Reviews
There are no reviews yet.