TYPE 2680 -- CARBIDE SPEAR POINT STRAIGHT SHANK
Carbide tip high temperature brazed.
Heat treated tool steel body.
Long carbide tip permits many regrinds.
USE:
Drills glass, tile, porcelain, ceramic and other hard fragile materials without chipping or cracking the material when properly used.
Speed should be about 25 surface feet per minute (300 to 600 RPM) using a steady, moderate hand feed.
Constant flow of coolant important.
Back material being drilled with wood or rubber to support material during drill break-through.
Avoid vibration and excessive stress.
Keep drill sharp to eliminate excessive pressure
