— OKS Spezialschmierstoffe GmbH, a specialist lubricant brand of Freudenberg, continues to offer OKS 511, a fast-drying molybdenum disulfide (MoS₂) bonded coating in aerosol form. Designed for machine elements during temporary operation or long standstill periods, it forms a grey-black, low-friction solid film on prepared metal surfaces.
OKS 511 combines MoS₂ and graphite as solid lubricants with a silicone-resin binder and fast-evaporating solvents (butyl acetate and benzine). At room temperature (20–25°C), the coating dries to handle in about 30 minutes. The recommended film thickness is 10–15 μm, with a theoretical coverage of 10–50 m²/kg, and it is supplied in a practical 400 ml spray can.
Stable Performance Across a Wide Temperature Range
OKS 511 operates from -180°C up to 450°C. It remains functional under cryogenic conditions and retains dry-lubrication capability at elevated temperatures. This makes it suitable for steel mills, foundry and glass equipment, rail components, and outdoor or thermally cycling systems.
Under heavy loads, low sliding speeds, oscillating motion, or intermittent operation, liquid greases may suffer from splash, starvation, or stick-slip. The OKS 511 dry film stays anchored to the substrate: press-fit tests (draft DIN 51 833) show a friction coefficient of approximately μ=0.07 with no chatter, helping to improve running-in of bearings, gears, and sliding pairs.
Reducing Contamination Risks in Dusty and Sensitive Environments
In dusty mining, metallurgy, paper, and logistics applications, liquid lubricants can trap abrasive particles. OKS 511 does not flow or migrate after curing, reducing adhesion and secondary wear. The coating is also radiation- and vacuum-resistant, and can be used on punching and forming tools to minimize galling and tool wear.
A Professional Maintenance Solution Across Industries
Target industries include iron and steel, rubber and plastics, chemicals, logistics, paper and packaging, rail vehicle technology, shipbuilding, municipal services, glass and foundry, and plant and machine (tool) engineering. The product is intended for professional users. Proper application requires mechanical cleaning and degreasing, a dry bright-metal surface, and—where needed—blast or chemically pretreated roughness to ensure optimal adhesion.
Safety note: OKS 511 is an aerosol containing flammable solvents (flash point <-30°C per DIN 51 755). Keep away from ignition sources, heat, and welding; always follow the current Safety Data Sheet (SDS), available at www.oks-germany.com.
OKS recommends that users validate suitability for their specific load, speed, temperature, and material conditions. Rather than replacing all grease lubrication, OKS 511 complements it—especially for cold starts, long standby periods, high-temperature short-travel motion, and contamination-sensitive operations.
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