5 Diameters 10.0mm--20.0mm Carbide External Coolant Hole

Solid Carbide External Coolant Hole Precision Drill Bits

An external coolant bit is a specialized bit with a channel or hole outside the bit body that allows the coolant or cutting fluid to flow directly to the cutting edge of the bit. This helps lubricate and cool the cutting edges, reducing heat and friction during drilling.

These drills are often used in metalworking applications that require high speed drilling or drilling through hard materials. Coolant or cutting fluid reduces cutting edge wear and improves overall drilling performance, thereby extending the life of the bit.

External coolant drill bits are available in a variety of sizes and configurations to meet different drilling needs. They can be used either in hand-held drills or in machine drilling and are usually used with coolant systems or coolant supply accessories on drilling machines.

When using externally cooled bits, it is important to ensure that the coolant or cutting fluid is properly supplied and maintained to ensure optimal drilling performance and tool life.