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More Information
Mfg SKU #202-1370
Tool Holder CategoryCollet Chuck
BrandShars Tool
shank sizeR8
drawbar thread size7/16x20UNF
Dual Contact Tool HolderNo
collet seriesER40
collet chuck stylestandard
collet nut diameter63mm


  • Concentricity is less than .0002 at collet face

  • Made of alloy steel and hardened to HRc 58 and all critical surface is precision ground

  • R8 drive slot is precision mill finished to give a tight fit into the R8 spindle

  • Internal set screw is included and can be used as a stopping pin to prevent end mill or drill from sliding backwards while performing heavy cutting
  • ER collet nut is black oxided