The recently launched CoroDrill 870 for steel and cast iron drilling will also be available for stainless steel from 1 October
The exchangeable-tip CoroDrill 870 drills are designed to save time and reduce hole costs as they can be tailored to optimise applications through diameter range, steps and length possibilities. Holes closer to required specifications leave them better suited to subsequent operations. A highly secure interface between drill body and tip ensures reliability and precision, while the simple tip change procedure helps to maximise active machining time.
The cutting edge geometries and grades have been designed to provide a safe cutting process, allowing for increased penetration rates while maintaining chip control and increasing tool life. Grade GC2234 includes a fine grained high chromium substrate and a new PVD coating with optimised composition for ISO M drilling (stainless). The thin AlTiN PVD coating includes enhanced adhesion steps for longer tool life and increased chipping resistance.
The drill is available in diameter range: 10 to 26.65 mm and lengths up to 8 ? drill diameter as standard. Each drill body has a unique interface size with matching tips to achieve hole tolerances of H9–H10.