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NSK linear guides and ball screws are used in various applications and environments. A major concern in these settings is preventing rust which may occur during wet processing in manufacturing equipment using chemicals or water. NSK applies a fluororesin coating as a surface treatment on electrolytic anti-rust black film as the optimal rust prevention coating for linear guides and ball screws in such machines and equipment. It provides a longer life and contributes to reduce maintenance and dowtime in operation.

Condition Description

  • Arduous Environments
  • Corrosive Environment


  • Food and Beverage
  • Material Handling
  • Semiconductor

Product Features

  • Black plating: treated to form a stable thin film (1-2µm)
  • Fluororesin coating to enhance corrosion resistance
  • Treatment with no hydrogen brittleness


  • Good corrosion resistance to humidity
  • Accuracy of parts preserved, due to the low film thickness
  • Good corrosion resistance to chemical exposure
  • Economical