Sandvik Coromant says that its CoroDrill DS20 is the first indexable drill concept capable of producing hole depths up to 7xD.
Sandvik Coromant says that its CoroDrill DS20 is the first indexable drill concept capable of producing hole depths up to 7xD.

Sandvik Coromant says that its CoroDrill DS20 is the first indexable drill concept capable of producing hole depths up to 7xD. The drill, which includes completely new designs for both the body and inserts, reportedly has reliable, predictable chip control and improved penetration rates in all 4-7xD applications.

The indexable drills are intended to replace the company’s existing CoroDrill 880 and CoroDrill 881 tools. According to the company, they provide tool life improvements of up to 25% and productivity gains up to 10%, depending on workpiece material.

The company is also releasing a Modular Drilling Interface (MDI) that acts as a coupling between the drill and adaptor. It is available in Coromant Capto and HSK shank types.

‘Among the most important factors when drilling to depths of more than 5xD is controlled cutting forces, secure chip evacuation and high centring capabilities,’ said Håkan Carlberg, Senior R&D engineer, Indexable drilling at Sandvik Coromant. ‘Going from a 5xD to a 7xD drill, the theoretical difficulty increases approximately three-fold due to an increased inclination to bend. Designing a CoroDrill DS20 7xD drill requires careful consideration for around 50 parameters that all depend on each other. The outcome is improved process security through lower forces and lighter cutting, particularly at entry. In turn, users achieve lower cost per hole, the ability to drill deeper and reduced sound levels.’

This story uses material from Sandvik Coromant, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.