Sandvik Coromant CoroDrill 862 coated micro-geometry drills smooth chip evacuation
Sandvik Coromant CoroDrill 862 micro-geometry drills boast a coating that helps retain cutting edge geometry and provides a smooth surface for chip evacuation. The company says the drills, which can be used on steel, stainless steel, cast iron and aluminium, demonstrate their performance capability for holes up to 2.95 mm diameter.
CoroDrill 862 drills have a point geometry that reduces thrust forces and promotes chip removal. The latter is further aided by flute geometry which makes the chips small and manageable.
As Sandvik Coromant points out, chip evacuation is vital, as even the smallest accumulation can lead to tool breakage and loss of precision. It says the drills provide good hole entry and exit with an achievable hole tolerance of H8-H9. Internal coolant holes, delivering coolant directly to the tip of the drill even at deep drilling depths, further assist precision and chip removal.
Available in diameters of 1.85 to 2.95 mm (3 mm shank diameter across the range), the CoroDrill 862 range offers lengths of 8-12XD. The drills are only for use with Sandvik Coromant's HydroGrip high precision chucks.
