Technical Information Collets TG Collet Series The TG collet series is the first choice when high precision, gripping torque, and The taper’s slow angle produces a sticking action, so collets must be snapped into versatility are required. These single-angle collet chucks grip at approximately 3:1 the locknut before assembling the locknut onto the chuck. Follow the procedure on for grip torque versus tightening torque without a stop screw. page K79 for assembly/disassembly instructions. Standard Collet • 0,40mm (.016") maximum collapse. Bonded Seal Collet • 0,13mm (.005") maximum collapse. • 100 bar (1,500 psi) coolant pressure. DA Collet Series DA-style collet chucks have a grip of approximately 1:1 tightening torque versus grip torque. ER Collet Series The ER collet series is an international standard style used for many applications. Collets from this series are ideal for boring, milling, reaming, tapping, and grinding. ER collets are manufactured from alloy steel and hardened for long life. They offer a grip of approximately 2:1 tightening torque versus grip torque. See page K79 for assembly/disassembly instructions. K78 WWW.WIDIA.COM Technical Information