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New Grades to Reliably Drill Aluminum Alloys

The Walter grade WNN15 (PVD coated) and WN15 (uncoated polished) are available for indexable insert drills.

Walter Sized

WNN15 grade from Walter (Greer, SC) is an extremely reliable, low-adhesion grade that is now also included in the company’s indexable insert drills. The drills that accept indexable inserts made of grade WNN15 include D4120, D3120, and B3212.DF. to B3214.DF in insert versions P4840, P2840 and LCGX.

The grade is primarily designed for drilling wrought or cast aluminum alloys (ISO N workpiece group). Applications for these alloys are mainly found in the aerospace and automotive industries, as well as in general mechanical engineering. Additionally:

  • The drilling grade WNN15 features a hard substrate, which ensures outstandingly high cutting-edge strength and sharpness on indexable inserts.
  • In addition to exceptional process reliability, the inserts offer a high level of wear resistance to provide long tool life even at extremely high cutting speeds. 
  • An increase in tool life of up to 200% can be achieved compared to conventional drilling grades, depending on the application. 
  • These capabilities make drilling with the grade WNN15 indexable inserts more cost-effective than comparable PCD tools.

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