Technical Information Collets TG and ER Collet Assembly/Disassembly Instructions • First, place the locknut with nose ring over collet nose. Apply force on the • To remove the collet from the locknut, hold the nut firmly in one hand and apply locknut until it snaps into place. The nose ring is now seated into the collet a bending action on the collet with the other hand until the collet snaps free undercut and should turn freely. from the nose ring. NOTE Inserting the cutting tool less than 2/3 the gripping length into the collet can permanently damage the collet. The full length of the gripping bore needs to be maintained to achieve maximum accuracy and safety. Collet accuracies are based on size-for-size conditions. Using the collapsible range can influence the accuracy and gripping powers. Never try to stretch collets by clamping oversized cutting tools. ER-Style Collet TG-Style Collet Maximum Runout Error L = 50mm (1.969") D = 18–28mm (.71–1.02") L = 50mm (1.969") D = 10–18mm (.39–.71") L = 25mm (.984") D = 6–10mm (.24–.39") L = 16mm (.630") D = 3–6mm (.12–.24") L = 10mm (.394") D = 1,6–3mm (.06–.12") L = 6mm (.236") D = 1–1,6mm (.04–.06") 0,008mm 0,010mm 0,015mm 0,020mm (.0003") (.0004") (.0006") (.0008") TGHP (precision) = TG (standard) = DIN 6499 Class 1 ER — DIN 6499 Class 2 WWW.WIDIA.COM K79 Technical Information