5 Diameters 1.0-- 10mm Carbide Drill Bit Coolant

External coolant drilling bits are specialized drill bits that have channels or holes on the outside of the bit body to allow coolant or cutting fluid to flow directly to the cutting edges of the drill bit. This helps to lubricate and cool the cutting edges, reducing heat and friction during the drilling process.

These types of drill bits are commonly used in  Auto Lathe Machine, Automatic Turning Machine Cnc Auto Lathe and metalworking applications,where high-speed drilling or drilling through hard materials is required. The coolant or cutting fluid helps to prolong the life of the drill bit by reducing wear and tear on the cutting edges, as well as improving the overall drilling performance.