Technical Information Collets ER • Single Angle • Provides good grip and accuracy for all drilling applications. • Wide clamping range. • Available in both inch and metric bores. • 1mm (.040") range of collapse. • Manufactured to DIN 6499 Class 2 accuracy. ERTC • Single-Angle Tap Collet • Designed to grip taps on shank and square to eliminate slippage. • Fits all standard ER-style collet chucks. • 0,13mm (.005") range of collapse. ERTCT • Single-Angle Tap Collet with Axial Compensation • Designed to grip taps on shank and square to eliminate slippage. • Tension only, cost-effective solution for machines that require axial compensation for tapping. • Fits all standard ER-style collet chucks. DA • Double-Angle • 0,8mm [1/32" (.031")] range of collapse. DAC • Double-Angle Coolant • Rubber-filled slots seal coolant-fed tool applications. • Suitable for coolant pressure up to 70 bar (1000 psi). • Fits all standard DA-style collet chucks. • 0,13mm (.005") range of collapse. DANP • Double-Angle Non-Pullout — Weldon® Style • Designed to grip end mills with Weldon-style shanks. • Positive retention and drive provided by drive wedge in collet. • Eliminates inaccuracy created by solid end mill adapters. • Fits all standard DA-style collet chucks. • 0,13mm (.005") range of collapse. WWW.WIDIA.COM K77 Technical Information