Description
Castrol Magna™ SW Range 68 – Slideway Lubricants for All-Round Performance
Description: Castrol Magna™ SW Range 68 (previously known as Castrol Magna™ GC 32, BD 68, and CF 220) are specially formulated slideway lubricants designed to provide exceptional performance with excellent stick-slip and load-carrying properties. These lubricants combine controlled frictional characteristics with high film strength and load-bearing capacity to eliminate ‘stick-slip’.
Application:
- Magna SW 32: A light viscosity, combined hydraulic and slideway lubricant. Suitable for lightly loaded slideways found on small center lathes and combined hydraulic and slideway systems such as in reciprocating grinding machines.
- Magna SW 68: A medium viscosity slideway lubricant suitable for use in most machine tool lubrication systems specifying an ISO VG 68 oil. Meets the Cincinnati Milacron P47 specification.
- Magna SW 220: Formulated for heavily loaded slideway applications or where there is a vertical or inclined slideway. Meets the Cincinnati Milacron P50 specification.
Advantages:
- Good lubricity: Prevents stick-slip of slideways.
- High load carrying capacity: Prevents wear of highly loaded slideways.
- Good demulsification and cutting fluid compatibility: Can be used in the presence of water or water-based metalworking fluids.
Typical Characteristics:
| Property | Test Method | Unit | SW 32 | SW 68 | SW 220 |
|---|---|---|---|---|---|
| Appearance | Visual | Clear amber fluid | Clear amber fluid | Clear amber fluid | |
| ISO Viscosity Grade | ISO 3448 | 32 | 68 | 220 | |
| Density @ 20°C / 68°F | ASTM D4052 / ISO 12185 | g/ml | 0.88 | 0.88 | 0.89 |
| Kinematic Viscosity @ 100°C / 212°F | ASTM D445 / ISO 3104 | mm²/s | 5.3 | 9.2 | 19.5 |
| Kinematic Viscosity @ 40°C / 104°F | ASTM D445 / ISO 3104 | mm²/s | 32 | 68 | 220 |
| Viscosity Index | ASTM D2270 | 96 | 110 | 100 | |
| Pour Point | ASTM D97 / ISO 3016 | °C / °F | -12/10 | -11 / 12 | -10 / 14 |
| Flash Point (open cup method) | ASTM D92 / ISO 2592 | °C / °F | 216/421 | 218 / 424 | 254 / 489 |
| Rust Test – Distilled Water (24 hrs) | ASTM D665A / ISO 7210 | Rating | Pass | Pass | Pass |
| Rust Test – Synthetic Seawater (24 hrs) | ASTM D665B / ISO 7210 | Rating | Pass | Pass | Pass |
| Copper Corrosion (3 hrs @ 100°C/212°F) | ASTM D130 / ISO 2160 | Rating | 1b | 1b | 1b |
| Four Ball Wear Test (400N, 75°C, 1200 rpm, 1 hr), Scar Diameter | ASTM D2266 | mm | – | 0.35 | – |
| Stick-Slip Ratio | Cincinnati Machine | < 0.8 | – | – | |
| Cincinnati Machine Specification | P-47 | – | P-50 |
