Utoolmart ER20 Collet Chuck 12mm Gripping Range Spring Collet High Precision Spring Steel Collets for CNC Milling Lathe Tool Workholding Engraving Machine Holder

• Model - ER-20 Spring Collet, 12mm Clamping Diameter.
• Material - 40Cr Sping Steel
• Precision - 0.015mm / 0.0006-inch
• Application - Suitable for boring, milling, drilling, tapping, engraving, CNC, spindle machines, and other processing
• Package Content - 1 x Spring Collet Chuck

Specification: Model: ER20 Collet Diameter:21mm(.827'') Collet Length:31.5mm(1.240'') Made of high grade spring steel.high precision Application: Widely used clamping system in the world for a variety of machining applications including boring, milling, reaming, tapping and grinding. Used for CNC milling lathe tools and workholding engraving machine Collet must be assembled into the clamping nut before inserting into the chuck. 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 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.