Countersink with five edges, point angle 90° and bit shank E 6,3

Traditional Forstner bit with centre point, two main cutting edges and two circumferential cutters. Low friction due to the reduced peripheral cutting edge

600 – 6000 rpm. e.g. Ø 68 mm 1300 rpm in European hard wood. Further details in the speed diagram

Bormax® 2.0 prima with exchangeable pre-drill bit, centre drill bit or guiding pin. Much less feed force needed as well as minimized friction and therefore less heat generation. Reasons: The two main cutting edges are grooved shifted, as well as the toothed linear grooved pre-cutters. A matching centre drill bit and an allen wrench are included in the delivery. Hexagonal shank for a better power transfer