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MOLYKOTE 7348 1 kg, high-temperature silicone bearing grease, NLGI 2, −20 °C to +230 °C
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Description
MOLYKOTE 7348 Silicone Grease 1 kg is a high-temperature NLGI 2 silicone grease for rolling-element bearings and applications exposed to elevated heat. It provides long-term lubrication, oxidation and water resistance, and low volatility in demanding process conditions.
Benefits and unique features
- Long-term lubrication at high temperatures (up to +230 °C, short-term up to +250 °C)
- Low evaporation and high oxidation resistance – stable bearing operation
- High drop point (>290 °C) and good water resistance
- NLGI 2 – versatile consistency for ball and roller bearings
- Suitable for centralized lubrication systems
Properties and applications
- High-temperature bearings: driers, sterilizers, furnace fans, drives in hot zones.
- Transport and finishing lines: conveyor chains in wood-coating plants.
- Humid environments: good resistance to water and condensate – stable lubricating film.
- Safety note: avoid strong oxidizers; above ~150 °C in air, trace formaldehyde vapors may form – ensure adequate ventilation.
Technical parameters
| Parameter | Value |
|---|---|
| Net content | 1 kg |
| Color | light beige |
| Type / composition | silicone grease; lithium-complex thickener; anti-oxidant and solid lubricants |
| NLGI grade | 2 |
| Worked penetration (ISO 2137, 60 strokes) | 265–295 (1/10 mm) |
| Density (20 °C) | 1.09 g/ml |
| Base-oil viscosity (25 °C) | 500 mm²/s |
| Service temperature | −20 °C to +230 °C (short-term to +250 °C) |
| Drop point (ISO 2176) | >290 °C |
| 4-ball weld load (DIN 51350-4) | 1500 N |
| Water resistance (DIN 51807 pt.1) | rating 1-90 |
| Oil separation (DIN 51817) | ~1.9 % |
| Oxidation resistance (100 h, 99 °C) | ~0.1 bar pressure drop |
| Flash point (closed cup) | >250 °C |
| Product classification | not classified as hazardous |
| Transport classification | not subject to ADR / IMDG / IATA |
Storage recommendations
Store in the original, tightly closed container in a dry, ventilated place, away from oxidizers. Recommended storage temperature: ≤ 20 °C. Stated shelf life: up to 60 months from date of manufacture (when properly stored).
FAQ
1) What is the service temperature?
Approximately −20 °C to +230 °C; short-term to +250 °C.
2) Suitable for driers and conveyor chains?
Yes—proven on driers and conveyor chains in wood-coating plants; also suitable for sterilizers.
3) Can it be used in centralized lubrication systems?
Yes, it can be fed via central lubrication systems.
4) Is it hazardous or ADR-regulated?
No—it's not classified as hazardous and is not subject to ADR/IMDG/IATA.
5) Key figures?
NLGI 2; base-oil viscosity 500 mm²/s; drop point >290 °C; 4-ball 1500 N; density ~1.09 g/ml.
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