CASTROL MAGNA SW B 68
Castrol Magna SW B 68 (formerly Castrol Magnaglide B) is a high-performance demulsifying slideway oil for machine tools, classified as CGLP according to DIN 51502. Based on solvent-refined mineral oils and a robust additive system, it provides excellent load-carrying capacity and wear protection. Its strong demulsibility helps prevent deposits on slideways when used alongside water-miscible coolants.
Applications
- Lubrication of metal-to-metal slideway pairs
- Suitable for metal/plastic combinations
- Roller guides, spindle guides and oil-filled milling heads
- Machine tools requiring smooth, precise feed movements
User advice
- High film adhesion ensures stable lubrication even at very low sliding speeds.
- Prevents stick-slip and chatter marks under high specific loads.
- Do not mix with zinc-containing oils to maintain performance.
Advantages
- Excellent load-carrying and anti-wear performance
- Strong demulsibility with water-miscible coolants
- Smooth feed movements without stick-slip
- High adhesion extends re-lubrication intervals
- Reliable corrosion protection during standstill
- High damping capability of the oil film
Typical characteristics
- ISO viscosity grade: 68
- Density at 15 °C: approx. 880 kg/m³
- Kinematic viscosity at 40 °C: approx. 70 mm²/s
- Flash point (COC): approx. 232 °C
- Pour point: approx. -33 °C
FAQ – Frequently Asked Questions about Castrol Magna SW B 68
What is Magna SW B 68 used for?
It is designed for slideway and guide lubrication in machine tools where smooth, precise feeds are required.
Why is demulsibility important?
It separates any carried-in water-miscible coolants quickly and helps avoid sticky deposits on slideways.
Does it prevent stick-slip?
Yes, the high-adhesion film enables smooth motion even at very low sliding speeds.
Can it be mixed with other oils?
Mixing with zinc-containing oils should be avoided to preserve performance.
Is it suitable for metal/plastic slide pairs?
Yes, it can be used for both metal-to-metal and metal/plastic combinations.
