Specification ModelER11Precision0 012MaterialSteelGripping Range1 mm 1 5 mm 2 mm 2 5 mm 3 mm 3 5 mm 4 mm 4 5 mm 5 mm 5 5 mm 6 mm 6 5 mm 7 mm 1 4 1 8 Upper Diameter12mmBottom Diameter8mmHeight20mmQuantity15pcs Features Durable and practical Ground roughness and overall fine polish Special angled slots increase rigidity Protects tool holder from contaminants Better overall balance of tool holder assembly With high precision and strong holding force Suitable for boring milling drilling tapping engraving CNC spindle machines and other processing The correct method 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 Note Avoid fastening pressure cap that not installed tool to avoid damage the clamp spring3 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 Included 15 x ER11 Collet ChuckMore to search ER11 ER16 ER20 ER25 ER32 Imperial Collet Chuck ID 1885466ER11 ER16 ER20