Seco Tools, debuted the company's EBP 5672 collet chuck. The new collet chuck combines the accuracy of shrink-fit and hydraulic chucks with the flexibility of a collet chuck for reduced runout, increased torque capabilities and greater productivity, according to the company.

Designed to maximize clamping force by distributing it equally over the full length of the collet, the EPB 5672 minimizes tool runout. The combination of a strong, trapezoidal thread nut and precise grind of the collet nut and body ensure the tool's even holding pressure and allows the collet to seat firmly and securely within its pocket. In tool lengths three times O.D., the EPB 5672 reduces runout to a max of 3µm.

"High speed machining creates unique demands on collet toolholders that require high accuracy and the ability to hold a tool in place without tool movement," said Mike Smith, product manager of reaming and EPB products at Seco Tools. "With the new features of the 5672 holder, shops gain both of these benefits in a compact package, allowing for more aggressive cutting parameters and increased tool life."

The EPB 5672 features a new type of collet nut that has two cylindrical guiding surfaces on both sides of the thread. This feature helps to center the tool and the collet to the centerline of the toolholder. Another unique feature is the special thread on the nut, which helps create a strong and uniform gripping force on the collet and the tool shank. Milling tests with the EPB 5672 show increases in tool life of over 30 percent compared with conventional collet chucks.