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5mm Fixed Size 5 Micron ER25-EM Collet for End Mill

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More Information
Mfg SKU #202-6999
Collet CategoryER Collets
collet seriesER25
collet size5.0MM
collet size rangeFixed Size
TIR (inch)0.0002



  • tegara ER SK ADS collet chuck tool holder

    SUJ2 alloy steel from Japan

    Made from SUJ2 alloy steel from Japan which is equivalent to AISI 52100 and hardened to HRC 46-48

  • tegara ER SK ADS collet chuck tool holder

    Mirror Finished

    Internal bore and the 2 taper surfaces are precision ground in a CNC grinder Shigiya from Japan to roughness tolerance of Ra 0.4

  • tegara ER SK ADS collet chuck tool holder

    Taper Accuracy

    An ER collet is selected during the CNC grinding process to check the 2 taper contact surface's accuracy


  • Robotic Automation in Manufacturing

    We optimize our manufacturing workflow for both efficiency and accuracy by utilizing robotic arms to load and unload ER collet stock into the Shigiya CNC grinders which are made in Japan. Combining the robotic arms with a reliable CNC grinder is our formular to control tight tolerance in a mass production environment.

  • Spotlight right

    5 Micron Runout

    Each collet is inspected 3 times at 0, 120, and 240 degree at 4 times diameter to guarantee the 5 micron (0.000197") runout tolerance.  This inspection process is also repeated 3 times with fully disassemble collet from the collet nut and the tool holder to guarantee consistent runout tolerance

  • ER-EM collet does not have a collapse range, unlike the standard collet does
  • Nominal size of ER-EM collet covers the most popular end mill shank size in both inch and metric size
  • ER-EM collet is capable to fit into the standard ER tool holder
  • Made in TAIWAN
  • Conform to DIN6499B