7PCS Full ER11 Precision Spring Collet Set CNC Milling Lathe Tool & Workholding Description : 7PCS Full ER11 Precision Spring Collet Set CNC Milling Lathe Tool & Workholding Features : Hardened & precision ground. Big clamping force and wide clamping range, widely used in machining centers, general milling machines, CNC milling machine, engraving machine, high-speed machines, and other processing. Specification : Type : Machine Tool Accessories Applicable machine : CNC machine Material : high-carbon steel Accuracy : 0.015mm Model : ER11 (Size of 7pcs : 1/16", 3/32 ", 1/8", 5/32", 3/16", 7/32", 1/4") 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 pr essure cap, until clip firmly the tool before use. (Note : Avoid fastening pressure cap that not installed tool, to avoid damage the clamp spring) 3. Use a wrench to loosen the pressure cap and took out the chuck or tool, remove the tool. Along the direction of the arrow push out the clamp spring. Then according to need replace other clamp spring. Package includes : 7 x Full ER11 Precision Spring Collet (total 7 pieces, with size 1/16", 3/32", 1/8", 5/32", 3/16", 7/32", 1/4")