Product Description Castrol OptiGear OG 4 EP is a high-performance open gear lubricant formulated with highly refined mineral oils, tackiness ag…
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Castrol OptiGear OG 4 EP is a high-performance open gear lubricant formulated with highly refined mineral oils, tackiness agents, and advanced extreme pressure (EP) additives including solid lubricants such as graphite.
It is designed for severe service applications where conventional lubricants fail due to heavy load, shock loading, water ingress, and dust contamination.
The product forms a highly adhesive lubricating film that remains on gear teeth surfaces, ensuring continuous protection and reduced wear under harsh operating conditions.
Extreme Pressure (EP) Protection
Provides outstanding load-carrying capability under heavy and shock loading conditions.
High Tackiness & Adhesion
Strong film retention reduces fling-off from large open gears.
Solid Lubricant Technology
Graphite additives reduce friction and protect under boundary lubrication.
Excellent Water Resistance
Maintains lubricating film even in wet and contaminated environments.
Wear & Scuffing Protection
Minimizes gear tooth wear and surface damage.
Improved Equipment Reliability
Extends service life of open gear systems and reduces maintenance downtime.
Castrol OptiGear OG 4 EP is recommended for:
| Property | Typical Value | Test Method |
|---|---|---|
| Appearance | Black, tacky semi-fluid | Visual |
| Base Oil Type | Mineral | — |
| Solid Lubricant | Graphite (EP additive) | — |
| Kinematic Viscosity @ 40°C | 400 – 600 mm²/s | ASTM D445 |
| Density @ 15°C | ~1.0 g/cm³ | ASTM D4052 |
| Flash Point | >200 °C | ASTM D92 |
| Operating Temperature Range | −10°C to +120°C | — |
| Kinematic Viscosity @ 40°C | 13000 | ASTM D445 |
| FZG Gear Scuffing test - A/8.3/90 | >12 | ISO 14635-1 |
| Four Ball Weld Load test - Weld Point | >800 | ASTM D2783 |
| Kinematic Viscosity @ 100°C | 550 | ASTM D445 |
| Water Washout Resistance | Excellent | ASTM D1264 |
Store in sealed containers in a cool, dry place. Stir before use if separation occurs. Avoid contamination with water or dust.
Refer to the Safety Data Sheet (SDS) for detailed handling, storage, and environmental information.
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