7pcs ER20 Chuck Collet 1/8 to 1/2 Inch Spring Collet Set For CNC Milling Lathe Tool

Description:7pcs ER20 Chuck Collet 1/8 to 1/2 Inch Spring Collet Set For CNC Milling Lathe ToolSpecification:ModelER20Precision0.015MaterialSpring SteelGripping Range1/8,3/16,1/4,5/16,3/8,7/16,1/2Upper Diameter28 mmBottom Diameter25 mmHeight34 mmQuantity: 7pcsFeatures:1. High Accuracy and Ease of Operation.2. Use high-quality Carbon steel, after heat treatment, has good flexibility and abrasion resistance.3. The clamping force, high accuracy, good gripping stability.4. Can be for gripping the drill, boring knife, chisel, reamers and other tools.5. Ground roughness is Ra0.4 Microns, plus overall fine polish.6. Suitable For: Boring, milling, drilling, tapping, engraving, CNC, spindle machines, and other processing7. 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.The correct methods of mounting the collet nut:1. Put the chuck into the pressure cap, gently turn the clamp spring, when eccentric portion of the pressure cap recessed clamp spring groove. Along the arrow direction and use equal force to push clamp spring, can mount pressure cap.2. Put the clamp spring and cap all together installed on the chuck body or spindle. Insert into the clamping hole after wipe the cylindrical shank, use a wrench to tighten the pressure cap, until clip firmly the tool before use.Package Included:7pcs x ER20 ColletsNote:Manual measuring, plea