14pcs ER20 1/16 Inch to 1/2 Inch Spring Collets Set For CNC Engraving Milling Lathe Tool

Description 14pcs ER20 1 16 Inch to 1 2 Inch Spring Collets Set For CNC Engraving Milling Lathe ToolSpecification ModelER20MaterialSpring SteelPrecision0 015Gripping Range1 16 3 32 1 8 5 32 3 16 7 321 4 9 32 5 16 11 32 3 8 13 32 7 16 1 2Upper Diameter28 mmBottom Diameter25 mmHeight34 mmT I R 0 0003 or 5um Suitable For Boring milling drilling tapping engraving CNC spindle machines and other processingGround roughness is Ra0 4 Microns plus overall fine polish Quantity 14pcs SetFeatures 1 Durable and practical 2 Special angled slots increase rigidity 3 Protects tool holder from contaminants 4 Better overall balance of tool holder assembly 5 Use with any standard ER collet chucks for coolant thru tool applications Package Included 14 x ER20 ColletsNote Manual measuring please allow 1 2 cm error thank you 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 More Details