CP-250A organoclay delivered an NLGI Grade 2 clay-based grease with dropping point exceeding 260°C, meeting the thermal demands of steel mill roll neck bearings operating at 180–220°C continuous service temperature.
A lubricant manufacturer required a high-temperature grease for steel mill continuous casting machine roll neck bearings. Existing lithium complex greases were failing at service temperatures of 180–220°C, leading to bearing failure and unplanned maintenance shutdowns.
| Component | Content |
|---|---|
| CP-250A organoclay | 12% |
| Mineral base oil (ISO VG 460) | 82% |
| Propylene carbonate (activator) | 0.4% |
| Water (activation aid) | 0.2% |
| Antioxidant + EP additives | 5.4% |
| Property | Specification | Achieved |
|---|---|---|
| NLGI Grade | 2 | 2 (worked penetration: 281) |
| Dropping point | >250°C | >260°C (no drop) |
| Water washout (ASTM D1264, 79°C) | <10% | 3.8% |
| Oxidation stability (ASTM D942, 100h) | <5 psi drop | 2.1 psi drop |
| Field bearing life vs Li-complex | — | +40% extension |
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