6pcs ER20 Spring Collet Set For Workholding & milling Lathe Tool

Specification:
Material:Spring Steel
Ground roughness is Ra0.4 Microns, plus overall fine polish
Diameter Range: 2mm,4mm,6mm,8mm,10mm,12mm
Size of Product:Dia*H/20*30mm/0.78*1.18
T.I.R.: 0.0003 or 5um. In order to make all collets running true, on your side, make sure your machine spindle and chuck holder running true, on my side, Ill make sure all those collets running in tenth.

Features:
Durable and practical
Special angled slots increase rigidity
Better overall balance of tool holder assembly
Protects tool holder from contaminants
Use with any standard ER collet chucks for coolant-thru tool applications.




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