Shell Tonna S3 M 68
Shell Tonna S3 M 68 is a premium machine tool slideway oil developed to provide precise lubrication performance, reliable friction control and strong protection for machine tool slideways, tables and feed mechanisms. Formulated using carefully selected base oils and advanced additive technology, Shell Tonna S3 M 68 delivers excellent stick-slip control and strong adhesion to slideway surfaces. The formulation is designed to support accurate machine movement and maintain consistent lubrication in demanding machining environments where exposure to metalworking fluids is common.
One of the key advantages of Shell Tonna S3 M 68 is its excellent frictional performance. The lubricant is specifically engineered to minimise stick-slip behaviour that can occur during slow or intermittent slideway movement. By reducing these friction variations, Shell Tonna S3 M 68 allows smoother machine motion and more accurate positioning of machine tool components. This improved control helps enhance machining accuracy, resulting in improved surface finish quality and better dimensional consistency of finished workpieces.
Shell Tonna S3 M 68 also provides strong adhesion to slideway surfaces. Special tackiness additives enable the lubricant to remain attached to metal surfaces even when exposed to water-based cutting fluids and metalworking coolants. This strong adhesion helps resist wash-off during operation, ensuring that lubrication remains consistent across the slideway surfaces. As a result, Shell Tonna S3 M 68 helps reduce lubricant consumption and maintain stable machine operating conditions.
Another important benefit of Shell Tonna S3 M 68 is its excellent separation from water-miscible cutting fluids. The lubricant separates quickly and effectively from soluble metalworking fluids, allowing contaminants to be easily removed through skimming. This separation helps maintain coolant cleanliness, extend coolant service life and support improved cutting performance while reducing potential health and safety concerns associated with contaminated coolant systems.
Shell Tonna S3 M 68 also delivers excellent anti-wear and corrosion protection 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. In addition, the formulation provides strong corrosion resistance, helping protect machine tool surfaces when exposed to water-based cutting fluids or humid operating conditions.
Shell Tonna S3 M 68 is particularly suited for horizontal machine tool slideways where medium viscosity lubrication is required. The lubricant is compatible with a wide range of slideway materials including cast iron and synthetic materials and is also suitable for machine tool hydraulic systems, gearboxes and headstocks, particularly in equipment with combined lubrication systems.
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 S3 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.
