OKS 4240 – Special Grease for Ejector Pins

OKS 4240 is a special grease for the lubrication of ejector pins in the plastics industry.

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Areas of application

  • Lubrication of ejector pins in the plastics industry at high temperatures and slow movements
  • Lubrication of rolling and friction bearings at extremely high temperatures and aggressive operating conditions

Advantages and benefits

  • Extraordinarily good resistance to vapours occurring during plastic processing
  • Good plastic and elastomer compatibility
  • Excellent temperature resistance
  • Lowest evaporation losses, also at high temperatures ensure long regreasing intervals
  • Good media resistance
  • Also suitable for fast-runing bearings thanks to low share of solid lubricants

Technical specifications

  • lower operating temperature: -20 °C
  • upper operating temperature: 300 °C
  • consistency: 2 NLGI grade (DIN ISO 2137)
  • viscosity at (40°C): 440 mm²/s (base oil)
  • four-ball test rig welding load: 4,800 N


Clean the lubricating points well for optimal effect. Subsequently blow out with dry compressed air. Before greasing for first time, remove anti-corrosion agent. Apply grease evenly to functional surfaces. Fill bearings running slowly completely, fill high-speed bearings (DN value > 100,000) only up to about 2/3 of the free space inside the bearing. The bearing and machine manufacturer's instructions should be observed. Relubrication at temperatures under 200°C not required. Assess the lubrication frequency and quantity on basis of service conditions. Only mix with suitable lubricants.

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