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ER16 R8 Collet Chuck Tool Holder System

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More Information
Mfg SKU #202-1428
Tool Holder CategoryCollet Chuck
BrandShars Tool
shank sizeR8
drawbar thread size7/16x20UNF
Dual Contact Tool HolderNo
collet seriesER16
collet chuck stylestandard


  • 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 nickel plated to improve rust resistance than black oxided finished collet nut

ER16 Collet Features:
  • Made from alloy spring steel and hardened to HRC 44-48
  • All fractional size is true imperial size, not a metric conversion size
  • All collets are checked its runout individually on 4 contact points by a high tolerance bench marked testing rod
  • On size 1/8" and larger the runout is .0003"; under size 1/8 the runout is .00059"
  • Each size of ER16 collet has collapsing range of .039" (1 mm); the size of the collet is the largest size it can hold and able to hold anything smaller within the collapsing range
  • Conform to DIN6499B
This collet size is true fractional size, not a metric converting size and the surface on this collet has been specially treated to increase its tool life.  Runout is .0003".

What’s Included

  • 1 PC of R8 ER16 Collet chuck
  • 1 PC of ER16 hex Wrench
  • 7 PCS ER16 Collets Size Included: 1/8" 3/16" 7/32" 1/4" 5/16" 11/32" 3/8"
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