Email: sales@runshengdcs.com
WhatsApp / Wechat：+86 15383419322
Phone：+86 15383419322Description
The ABB 3HNM07686-1 is a precision-engineered Axis-2 Gearbox designed exclusively for ABB’s IRB 6600/6650 industrial robot series, delivering robust power transmission for high-payload material handling applications. This hardened gear unit converts servo motor torque into precise joint movement with minimal backlash, enabling repeatable positioning within ±0.05mm during demanding palletizing and machine tending cycles. The 3HNM07686-1 features helical gearing with proprietary surface hardening treatment (HRC 60+), ensuring 20,000+ hour service life under continuous 300kg payloads. Sealed with triple-lip radial shaft seals and filled with ABB’s synthetic ROBOLUBE gear oil, it withstands particulate contamination in foundry and machining environments. Preloaded tapered roller bearings eliminate axial play during rapid directional changes, while the integrated temperature sensor port enables predictive maintenance. For automotive, logistics, and heavy manufacturing applications requiring reliable motion transmission, this gearbox maintains kinematic accuracy through 10 million operational cycles.
ABB 3HNM07686-1 3HNM07485-1 07
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 3HNM07686-1 |
| Manufacturer | ABB Robotics |
| Product Type | Robot Gearbox (Axis 2) |
| Compatible Robot Models | IRB 6600-250/3.15, IRB 6650-300/3.2 |
| Reduction Ratio | 1:120 |
| Rated Torque | 3,200 Nm (peak) |
| Backlash | <4 arc-min |
| Efficiency | 92% (typical) |
| Lubrication | Synthetic ROBOLUBE (1.2L capacity) |
| Shaft Seals | Triple-lip nitrile with dust excluders |
| Operating Temperature | -15°C to +90°C |
| Weight | 38.5 kg |
| Input Connection | Hirth coupling (50mm Ø) |
| Output Flange | ISO 9409-1-50-4-M6 |
| Protection Rating | IP67 (sealed against dust/coolant) |
| Bearing Type | Tapered roller (C3 clearance) |
Main Features and Advantages
Precision Gearing: Case-hardened helical gears with ground tooth profiles minimize vibration during acceleration/deceleration, critical for precision palletizing at 1.5m/s.
Extended Service Life: Carburized 20MnCr5 steel construction and anti-wear additive package in ROBOLUBE extend maintenance intervals to 24,000 operational hours.
Thermal Management: Integrated M12 temperature sensor port enables real-time monitoring through RobotWare, triggering alarms at 85°C to prevent overheating during overloads.
Contamination Defense: Labyrinth seals combined with radial shaft seals prevent ingress of welding spatter, grinding dust, or coolant in harsh environments.
Maintenance Optimization: Pre-adjusted bearing preload eliminates field recalibration. Grease purge ports allow in-situ lubrication without disassembly.
Application Field
The ABB 3HNM07686-1 operates in high-inertia applications:
Automotive Logistics: Palletizing engines/transmissions at 1,200 cycles/day in body shops
Foundry Automation: Handling sand cores and molten metal ladles in 65°C environments
Heavy Machining: Positioning 300kg castings for CNC machining with ±0.1mm repeatability
Tire Manufacturing: Transferring tire rims between presses with 180°/sec joint rotation
Beverage Production: Stacking 25kg kegs at 10 layers/hour without drift
The gearbox withstands shock loads from 1.5G emergency stops while maintaining positioning integrity.
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Related Products
3HNM07485-1: Axis-1 gearbox for base rotation in IRB 6600/6650 robots
3HAC14531-1: Servo motor for Axis 2 (paired with 3HNM07686-1)
3HAC17346-1: Brake release unit for gearbox maintenance
3HAC035454-001: ROBOLUBE service kit with synthetic oil and sealants
3HAC055075-001: Hirth coupling replacement set
3HAC042160-001: Tapered roller bearing overhaul kit
3HAC037105-001: Output flange seal kit (IP67 compliant)
3HAC047138-001: Temperature sensor (PT100) for thermal monitoring
