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Specially formed channel for removing chips, teflon-coated, changeable crest of thread HSS, two carbide tipped main cutting edges, protruding cutting edges and cylindrical shank with three clamping surfaces. Ground by diamond wheels on CNC-machines
One-piece drill bit (C6,3) with brad point, two main cutting edges, two protruding cutting edges and a hexagonal shank for bit holder (1/4“; C 6,3). Maximum rotation speed of the cordless screwdriver: recommended 3000 rpm
Rapid drilling in soft wood, European hard wood, chipboard, MDF etc. Rapid chipping of solid wood and chipboards. Clearly less effort is needed and boring is more rapid than with the usual Forstner bit
2800 – 3600 rpm e.g. Ø 18 mm 2800 rpm in glulam (glue laminated timber, on joinery machines) Made in Germany
“Lewis” pattern, crest of thread, main cutting edge and taper tap in premium quality. Version with stepped head and hexagonal shank from Ø 8mm.
500 – 2800 rpm. e.g. Ø 12 mm 2000 rpm in soft wood. Further details in the speed diagram
600 – 6000 rpm. e.g. Ø 68 mm 1300 rpm in European hard wood. Further details in the speed diagram
Traditional Forstner bit with centre point, two main cutting edges and two circumferential cutters. Low friction due to the reduced peripheral cutting edge