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More Information
Mfg SKU #202-5522
Collet CategoryER Collets
BrandShars Tool
collet seriesER20
collet size3/32
collet size range.0741-.0938
TIR (inch)0.0005



  • Made from alloy spring steel and hardened to HRC 44-48
  • Surface on the collet has been specially treated to extend the accuracy of the collet tooling life
  • All collets are checked its runout individually on 4 contact points by a high tolerance bench marked testing rod
  • On size 3.0mm and larger the runout is .0003"(0.008mm); under size 3.0mm the runout is .00059"(0.015mm)
  • This size of ER20 collet has collapsing range of .0197" (0.5 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