Sandvik Coromant 393.14-40 ER40 Collet is a DIN 6499-B ER40 collet designed for use with ER collet holders to clamp cylindrical tool shanks in milling, drilling, and tapping operations. Typical dimensions for this code family include an overall length of about 1.811 in (46 mm) and a body diameter of 1.614 in (41 mm), with a clamping capacity in the 0.669–0.709 in (17–18 mm) range. It is identified by ANSI/ISO code 393.14-40 and used to secure ER40 tools within Sandvik Coromant tooling systems to achieve precise, concentric gripping in standard DIN 6499-B interfaces.
