[Introduction to Eddy Current Sorting for Bolts]

[Eliminating Quality Risks in Mass Production — Application Case of FTS-eddy1]

In recent years, we have seen a significant increase in inquiries regarding Eddy Current (EDDY) inspection from safety equipment manufacturers in Europe and the United States.

The objective extends beyond dimensional inspection to strengthening the prevention of critical quality issues, including:

  • Material mix-ups
  • Heat treatment abnormalities
  • Escape of parts that skipped manufacturing processes

Heat treatment defects are particularly difficult to detect, as they are not visible and cannot be identified through dimensional or weight measurements.

At the same time, performing destructive testing on all workpiece is neither practical nor cost-effective.

This is where Eddy Current Testing systems play a crucial role.

▲ Example of bolt sorting using Eddy Current testing


Key Features of FTS-eddy1

  • Comparative method using Master Coil and Test Coil
  • Detectable defects include:
    • Major chipping or damage
    • Differences in shape and material
    • Hardness abnormalities
  • Enables 100% non-destructive inspection
    (e.g., inspecting all 100,000 parts in a lot)

Traditionally, hardness testing has relied on destructive sampling inspection.
However, FTS-eddy1 enables full inspection with non-destructive assurance for every single part.


In mass production environments, hardness defects and material mix-ups are critical issues that must never occur.

Although often emphasized, it is essential to recognize this method as a
“key solution for achieving 100% quality assurance” in preparation for unforeseen risks.

We are also currently developing concepts for automated systems with automatic feeding capabilities.

If your company is interested in detecting hardness abnormalities, material discrepancies, or implementing Eddy Current testing, please feel free to contact us.

We wish you a wonderful week ahead.

For inquiries, please contact:


FORTUNE CROSS (THAILAND) CO., LTD. / NANO SEIMITSU CO., LTD.
Mobile: +66 (0)61-572-1700
Contact person: Yada


#NANO_SEIMITSU #AOI_sorting, #eddy_currentsorting