Geometry overview of indexable drilling inserts WALTER Drilling Geometry Remarks / field of applications Workpiece material group P M K N S H O S

Geometry overview of indexable drilling inserts WALTER Drilling Geometry Remarks / field of applications Workpiece material group P M K N S H O Section Main cutting edge A57 The stable one 0° rake angle For unfavorable machining conditions mainly For cast iron and steel materials E57 The universal one 13° rake angle For medium machining conditions For cast iron and steel, but also for stainless and difficult to cut materials E67 The special one 13° rake angle Special geometry for optimum chip formation For long-chipping materials, e.g. 1018, stainless and also difficult to cut materials and aluminum P28467 The universal one (fully ground circumference) 0° rake angle High diameter accuracy For unfavourable machining conditions For cast iron and steel materials P28469 The sharp one (fully ground circumference) 12° rake angle High diameter accuracy For good machining conditions For long-chipping materials P28475 The universal one (circumference sintered) 12° rake angle Average diameter accuracy For medium machining conditions For cast iron and steel materials P28477 The stable one (circumference sintered) 0° rake angle Average diameter accuracy For unfavourable machining conditions For cast iron and steel materials P28479 The sharp one (circumference sintered) 12° rake angle Average diameter accuracy For good machining conditions For long-chipping materials Primary application Other application C 199 Technical information Drilling WALTER Valenite