Description
Product Description
CASTROL ALPHASYN EP 680 is a premium fully synthetic industrial gear lubricant based on Polyalphaolefin (PAO) synthetic base fluids combined with sulphur/phosphorus Extreme Pressure (EP) additive technology. It is designed for heavy-duty enclosed gear systems, shock-loaded gears, mining equipment, quarry machinery, marine applications, paper production equipment, and industrial gearboxes operating under severe conditions.
The PAO synthetic base provides a high viscosity index, excellent low-temperature performance, superior oxidation resistance, and extended oil life, while the EP additive system delivers high load-carrying capacity and protection against gear tooth wear, scuffing, and micropitting.
Features and Benefits
Fully Synthetic PAO Technology
Provides:
- Excellent thermal and oxidation stability
- High viscosity index
- Wide operating temperature range
- Reduced friction losses
- Longer drain intervals compared with mineral gear oils
Excellent Extreme Pressure (EP) Protection
Advanced sulphur/phosphorus EP additives protect against:
- Heavy loads
- Shock loading
- Gear tooth wear
- Scuffing
- Surface fatigue
Suitable for severe industrial gear applications.
Micropitting Protection
Provides improved resistance against:
- Gear surface fatigue
- Grey staining
- Micropitting damage
Helping extend gearbox life under high loads.
High Temperature Performance
The PAO formulation provides:
- Excellent oxidation resistance
- Reduced sludge and varnish formation
- Stable viscosity at elevated temperatures
- Longer lubricant service life
Excellent Water Separation & Foam Control
Provides:
- Good demulsibility
- Rapid air release
- Reduced foaming
- Improved bearing and gear reliability
Applications
CASTROL ALPHASYN EP 680 is recommended for:
Heavy Industrial Gearboxes
- Helical gearboxes
- Bevel gear units
- Planetary gearboxes
- Spur gears
- Enclosed industrial drives
Mining & Heavy Equipment
- Crushers
- Conveyors
- Dragline equipment
- Quarry machinery
- Heavy-duty reduction drives
Industrial Plants
- Steel mills
- Cement plants
- Paper mills
- Marine equipment
- Power generation equipment
Specifications & Approvals
Meets or exceeds:
- DIN 51517 Part 3 – CLP
- DIN Classification: CLP-HC
- AGMA 9005-F16
- AIST 224
- David Brown S1.53.101 Type E
- Flender Gear Units Rev 16 (ISO VG 150–680)
Typical Physical Characteristics
| Property | Typical Value |
|---|---|
| ISO Viscosity Grade | 680 |
| Base Oil Type | Synthetic PAO |
| Additive Technology | Sulphur / Phosphorus EP |
| Density @ 15°C | ~870 kg/m³ |
| Kinematic Viscosity @ 40°C | ~671 mm²/s |
| Kinematic Viscosity @ 100°C | ~63.4 mm²/s |
| Viscosity Index | ~165 |
| Pour Point | ~ -36°C |
| Flash Point | >200°C |
| Rust Protection | Pass |
Performance Characteristics
- Fully synthetic PAO gear oil
- ISO VG 680 heavy viscosity grade
- Excellent EP load-carrying performance
- Excellent micropitting protection
- Superior high-temperature stability
- High film strength at elevated temperatures
- Excellent corrosion protection
- Good water separation properties
- Suitable for severe mining and industrial environments
- Extended oil drain capability
Product Category
Fully Synthetic PAO Extreme Pressure Industrial Gear Oil
ISO VG 680 | DIN CLP-HC
