R8 Shank ER Collet Chucks, ER32, ER40, 7/16"-20

Size of ER Collet: ER40 (0223-0240)

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R8 taper shank ER collet chucks are typically used on manual milling machines. The R8 taper end fits into a machine spindle and the ER collet nut is compatible with ER collet. The ER32 nut is compatible with ER32 style collet and the ER40 nut works with ER40 style collet. ER collets are used to hold all the machine tools with a round shank. These R8 shank ER collet chucks deliver the quality significantly above average on market. The total indicator runout (TIR) is less than 0.0002". The MAX RPM on the manual milling machines is 8,000. The manufacturer of the collet chucks inspects and produces them in a highly sophisticated lab and factory. You can hardly expect the collet chucks from the other MFG are with the same quality. 

  • Made of high-grade tool steel
  • Hardened and precision ground
  • Max T.I.R. 0.0002" O.D to I.D
  • No wrench included
Item Shank Type Gage
Collet Nut
Drawbar End
0223-0232 R8 ER32 2.83" 2.48" 7/16"-20
0223-0240 R8 ER40 2.48" 1.97" 7/16"-20


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