With the DC118 Supreme solid carbide drill, Walter is signalling the start of a new performance class for challenging applications. The "180° drills" differ from standard solid carbide drills in particular due to the high rigidity they provide against deflection, the good centring accuracy and four chamfers, which enable excellent guidance after plunging.
The reason for this is the 180° point angle, among other features. This means that the DC118 Supreme is ideal for plunging into angled or round surfaces because the drill is guided quickly on the external faces and centred accurately. At the same time, burr formation remains extremely low. A protective corner chamfer on the cutting edges protects them against rapid wear, which significantly increases tool life compared to drills without a protective chamfer. The excellent rigidity of the drill is a third feature which sets it apart from other products on the market. It is the result of the flat 15° helix angle, which minimises deflection forces and ensures a high level of stability and precision during ramping.
Initially designed for pilot drilling of deep bores on crankshafts, the current DC118 Supreme drill versions are now suitable for universal application with all materials and components. Practical applications, in addition to bores in angled or round surfaces, also include operations involving a flat hole face (such as for threads), components with an uneven surface (due to forged skin, for example) or chain drilling. In these applications, the DC118 Supreme impresses with long tool life and a high degree of precision and process reliability. The precision tool manufacturer offers the Supreme drill in the highest performance class with a diameter of 3–20 mm up to 2 × D as standard or as a special tool up to 5 × D via Walter Xpress with a delivery time of two weeks.