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Castrol Molub-Alloy OG 936 SF Heavy
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CASTROL Molub-Alloy OG 936 SF Heavy
Open gear compounds (solvent free)
Application CASTROL Molub-Alloy OG 936 SF Heavy
Molub-Alloy OG 936 SF Heavy is suitable for use on all types of open gears, racks and pinions and sliding or skidding applications such as draglines and shovels. It can be applied either manually or by heavy duty automatic systems. This product is used extensively in mining, construction, onshore drilling operations and on offshore installations, facilitating effective lubrication and protection on: Rack and pinion jacking mechanisms Cantilever skidding systems Mooring winch open gearing and slides FPSO offloading systems Crane slew ring & pinion Exposed threads on penstock valves Heavy duty top dressing for the ultimate protection of wire ropes Molub-Alloy OG 936 SF Heavy complies with the Bucyrus International SD 4713 specification (CAT) and Komatsu specifications for Open Gear Lubricants.
Your advantage! Price of CASTROL Molub-Alloy OG 936 SF Heavy drops automatically in larger quantities.
Performance, Features & Benefits of CASTROL Molub-Alloy OG 936 SF Heavy are:
- Formulated to address environmental concerns - it is free of solvents, lead, antimony and Barium.
- Forms a tough durable film with a "cushioning" effect, even under extreme pressures and at very slow speeds
- The film resists erosion from rain or sleet, and resists peeling in dusty environments
- The film resists destruction by contaminating oils and greases migrating from nearby mechanisms
If you have any questions, please contact OilOnline Technical Helpdesk
Product Description CASTROL Molub-Alloy OG 936 SF Heavy
Castrol Molub-Alloy™ OG 936 SF Heavy (previously called Molub-Alloy 936 SF Heavy) is an open gear lubricant developed specifically for use on heavy duty equipment in mining and industrial service. Molub-Alloy OG 936 SF Heavy is compounded to give maximum protection to gears and slides on large draglines and shovels while minimising potential pollutants to the environment. A proprietary blend of Molub-Alloy lubricating solids is included to promote anti-wear and load carrying properties. These lubricating solids work synergistically with chemical anti-wear and Extreme Pressure (EP) additives to reduce contact temperatures while providing excellent anti-weld protection under extreme pressure and shock loading. The structural integrity and strength of the lubricating film is particularly valuable in the critical process of seating new gears because of the natural occurrence of high spots (asperities) in newly machined surfaces. The lubricating film must separate the mating surfaces sufficiently to cushion the effect of the impact of asperities, and therefore minimise initial pitting which could lead to progressive and destructive pitting later. A highly refined, viscous, paraffinic petroleum derivative is the foundation of a blended base fluid with excellent natural chemical and thermal stability. Molub-Alloy OG 936 SF Heavy is compounded to flow readily in the film-forming process; yet it resists "squeeze-out" and clings tenaciously even to gear teeth in vertical orientation. Rust and oxidation inhibitors are included in the formulation to protect the equipment and the lubricating film against the elements in severe climates.
Typical Characteristics
| Product specifications : | CASTROL Molub-Alloy OG 936 SF Heavy | |
| Density @ 20°C / 59°F kg/m³ | ASTM D4052 / ISO 12185 | 950 |
| Consistency NLGI Grade |
ASTM D217 / ISO 2137 | 0 |
| Worked Penetration (60 strokes @ 25°C / 77°F) 0.1 mm | ASTM D217 / ISO 2137 | 345-360 |
| Brookfield Viscosity cP | ASTM D2983 / ISO 9262 | 144,000 |
| Base Oil Viscosity @ 40°C / 104°F mm²/s | ASTM D445 / ISO 3104 | 2030 |
| Base Oil Viscosity @ 100°C / 212°F mm²/s | ASTM D445 / ISO 3104 | 57 |
| Four Ball Weld Load test - Load Wear Index (27°C / 1770 rpm) |
ASTM D2596 / ISO 11008 | 130 |
| Four Ball Weld Load test - Weld Point kgf | ASTM D2596 / ISO 11008 | 800 |
| Four Ball Wear test - Wear Scar Diameter (40 kgf / 75°C / 1200 rpm / 1 hr) mm |
ASTM D2266 / ISO 51350 | <0.75 |
| Rust Test (distilled water) Pass | ASTM D1743 | Pass |
| Copper Corrosion (24 hrs,100°C / 212°F) Rating | ASTM D4048 | 1b |
| Grease Pumpability test - Lincoln Ventmeter psi | in-house method | 500 |
| Lubricating solids, particle size microns | - | nominal 15,maximum 45 |
Additional Information
Molub-Alloy OG 936 SF Heavy is not intended for general use in bushings and bearings except in slow moving, heavily loaded applications. Please contact your Castrol Technical Services team to discuss new applications of OG 936 SF in bearings.
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