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MOLYKOTE 44 Medium 5 kg, high-temperature silicone bearing grease, NLGI 2, −40 °C to +204 °C
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Description
MOLYKOTE 44 Medium High Temperature Grease 5 kg is a high-temperature silicone grease for bearings and mechanisms operating across a wide temperature range. The “Medium” grade (NLGI 2) provides stable consistency, low start-up torque and resistance to oxidation and water washout in demanding industrial applications.
Benefits and unique features
- Wide service range: −40 °C to +204 °C – reliable lubrication at cold starts and elevated temperatures
- Low volatility and good oxidation resistance – extended service intervals
- Resistant to water washout – stable lubricating film
- NLGI 2 (Medium) – suitable consistency for typical ball bearings under light to moderate loads
- Compatible with many plastics and rubber – can lubricate plastic gears, bearings and cams
Properties and applications
- High-temperature bearings: kiln/furnace fans, blowers, radiator cooling fans, conveyor drives.
- Process equipment: textile driers and heaters, conveyors in hot zones.
- Precision mechanisms: lightly/moderately loaded gears and bearings, instrument drives.
- Application notes: not recommended for highly loaded ferrous sliding combinations; avoid applying to surfaces to be painted.
Technical parameters
| Parameter | Value |
|---|---|
| Net content | 5 kg (pail) |
| Type | silicone bearing grease |
| Color | white / off-white |
| NLGI grade | 2 (Medium) |
| Worked penetration (ASTM D217, 60 strokes) | approx. 280 (1/10 mm) |
| Base oil / thickener | silicone oil / lithium soap |
| Base-oil viscosity (25 °C) | approx. 125 mm²/s |
| Service temperature | −40 °C to +204 °C |
| Drop point (ASTM D2265) | approx. 220 °C |
| 4-ball weld load | approx. 1100 N (≈ 113 kg) |
| Oil bleed 24 h (149 °C) | approx. 2.5 % |
| Oil separation (7 days, 40 °C) | approx. 1.4 % |
| Specific gravity (25 °C) | approx. 1.05 |
| Water solubility | insoluble |
| Flash point (closed cup) | > 101.1 °C |
| Product classification | not classified as hazardous |
| Transport classification | not subject to ADR / IMDG / IATA |
| Shelf life / storage | up to 60 months ≤ 32 °C; store away from oxidizers |
Storage recommendations
Store in the original, tightly closed container in a dry, well-ventilated place, away from oxidizers. Recommended storage temperature: up to 40 °C; for long-term storage ≤ 32 °C. Avoid overheating and contamination during application.
FAQ
1) What is the service temperature?
Typically −40 °C to +204 °C.
2) Medium vs Light?
Medium = NLGI 2 for a more stable consistency; Light = NLGI 1 for lower start-up resistance.
3) Compatible with plastics/rubber?
Yes – generally does not soften most plastics; suitable for plastic gears, bearings and cams.
4) ADR / classification?
It is not classified as hazardous and is not subject to ADR/IMDG/IATA.
5) Any limitations?
Not recommended for highly loaded ferrous sliding combinations; do not apply to surfaces to be painted.
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