Shell Tonna S2 M 68
Shell Tonna S2 M 68 is a high-performance slideway oil specifically developed for the lubrication of machine tool slideways, tables and feed mechanisms. Formulated with carefully selected base oils and advanced additive technology, Shell Tonna S2 M 68 provides excellent friction control, strong adhesion to metal surfaces and reliable protection for critical machine tool components. The formulation is designed to maintain smooth and accurate machine movement while providing consistent lubrication in environments where exposure to cutting fluids and metalworking coolants is common.
One of the key advantages of Shell Tonna S2 M 68 is its excellent frictional performance. The lubricant is engineered to minimise stick-slip behaviour, a condition where slideways move unevenly due to intermittent friction between surfaces. By reducing stick-slip effects, Shell Tonna S2 M 68 helps ensure smoother machine operation and more precise positioning of machine tool components. This contributes to improved machining accuracy, better surface finishes and greater dimensional consistency of manufactured parts.
Shell Tonna S2 M 68 also provides strong adhesion to slideway surfaces. Special tackiness additives allow the oil to remain firmly attached to machine components even when exposed to water-based metalworking fluids. This strong adhesion helps prevent the lubricant from being washed away during operation, maintaining consistent lubrication and reducing oil consumption while ensuring stable machine performance.
Another important benefit of Shell Tonna S2 M 68 is its excellent separation from water-miscible cutting fluids. The oil separates quickly and effectively from soluble metalworking fluids, allowing contaminants to be easily removed by skimming. This rapid separation helps extend coolant life, improve cutting performance and reduce potential health and safety concerns associated with contaminated coolant systems.
Shell Tonna S2 M 68 also provides effective anti-wear protection and corrosion resistance for machine tool components. The advanced additive system forms a durable lubricating film between metal surfaces, helping protect slideways, gears, bearings and hydraulic components from wear and damage. In addition, the formulation provides excellent corrosion protection, helping safeguard machine surfaces when exposed to moisture or water-based cutting fluids.
Shell Tonna S2 M 68 is particularly suited for the lubrication of horizontal machine tool slideways where medium viscosity oils are required. The lubricant is compatible with a wide range of slideway materials, including cast iron and synthetic materials, and may also be used in certain hydraulic systems and gearboxes where appropriate lubrication properties are required.
Physical characteristics include a kinematic viscosity of approximately 68 mm²/s at 40°C and 8.6 mm²/s at 100°C with a viscosity index of approximately 98. Shell Tonna S2 M 68 has a density of approximately 879 kg/m³ at 15°C, a flash point of around 225°C and a pour point of approximately −24°C, supporting reliable lubrication performance in demanding machine tool applications.
