Exclusive Sandvik Coromant/Citizen development speeds toolchanges

This development follows an exclusive collaboration between Sandvik Coromant and Citizen in Japan, leading to the birth of the Coroturn QS Quick Start system. Pivotal in the reduction of toolholder change time is the fact that the position of the cutting edge of the insert is automatically set by the toolholder against a dead stop and therefore does not require additional adjustment. The new Coroturn QS Quick Start system uses a spring-loaded wedge to locate the shorter than normal toolholder shank against a set dead stop in the gang tool post of the machine. This is a major advantage as it replaces the conventional wedge locking system that requires three screws and a wedge clamp to captivate the toolholder. To install the system, the conventional wedge is removed from the gang toolpost and replaced with the two elements of the QS system - a fixed dead stop and the toolholder clamp. The cutting edge of the insert in the toolholder is positioned and adjusted. The dead stop is then locked to provide the datum for repositioning the toolholder and the short toolholder is then clamped using the spring wedge ready for machining. Toolholders available in the range include front and back turning, parting-off, grooving and threading in 10 mm, 12 mm and 16 mm shank sizes for Citizen K, C, L and M-Series machines. The QS tooling system is available exclusively for Citizen machines through Sandvik Coromant of Halesowen and Citizen agent, NC Engineering of Watford.