Mobil Vactra No. 3
Mobil Vactra No. 3 is part of the Mobil Vactra Oil Numbered Series, a range of premium-quality slideway lubricants developed for precision machine tool applications. These oils are formulated using high-quality base stocks and an advanced additive system that delivers controlled friction characteristics, coolant separability and corrosion protection. The formulation helps ensure smooth slideway movement, improved machining accuracy and extended equipment life.
One of the key advantages of Mobil Vactra No. 3 is its controlled friction performance. The advanced additive technology helps eliminate stick-slip and chatter across a wide range of way materials including steel-on-steel and steel-on-polymer combinations. This allows smooth, uniform motion and helps improve surface finish and machining precision.
Mobil Vactra No. 3 also provides excellent coolant separability. The formulation is optimised to separate from aqueous metalworking fluids, reducing cross contamination and helping extend the service life of both lubricant and coolant. The oil also offers strong adhesiveness to maintain lubrication on critical sliding surfaces.
Another important benefit is its strong load-carrying capability. Mobil Vactra No. 3 is particularly suitable for larger machines where way pressures are high and precision is required. The lubricant also provides excellent rust and corrosion protection for sliding surfaces exposed to moisture or coolant.
Mobil Vactra No. 3 is recommended for large machine tools, vertical and inclined slideways and applications where drain-down can be a concern. It is also suitable for moderate service gear drives, ball screws, linear guides and headstocks. The oil can be applied manually, via forced-feed lubricators or by circulation systems.
Physical characteristics include ISO VG 150 viscosity grade with a kinematic viscosity of approximately 156 mm²/s at 40°C. Mobil Vactra No. 3 has a flash point of approximately 248°C and a pour point of approximately −6°C. The lubricant provides strong film strength, excellent surface protection and reliable slideway performance for heavy-duty machine tool applications.
