Sandvik Coromant CoroDrill 861 provides stability for depths up to 30XD
The CoroDrill 861, a range of solid carbide drills for deep hole applications, features advanced chip management flute geometry to generate small, manageable chips. Chip evacuation is critical with deep hole drilling as the build up of heat and friction resulting from an accumulation of chips can affect productivity and tool life – even lead to drill breakage and consequent downtime.
This, with special point geometry that reduces thrust forces plus patented double-offset margin geometry, helps to provide the stability necessary for drilling deep holes efficiently, explains Sandvik Coromant, and the CoroDrill 861's consistent edge preparation protects the cutting edge from premature chipping and flaking.
Internal holes deliver coolant directly to the drill tip, even at deep drilling depths to aid both precision and chip evacuation.
The CoroDrill 861 produces accurate holes to depths of 12-30XD, without pecking. Using a suitable high precision chuck, H8-H9 is an achievable hole tolerance in steel, stainless steel, cast iron and non-ferrous workpieces. It is capable of producing cross-holes, and holes in angled faces in such components as crankshafts, engine blocks and cylinder heads.
