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External cooling of carbide drills

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External cooling of carbide drills

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External cooling of carbide drills refers to the use of an external coolant or cooling system to cool down the drill bit and the cutting zone during the drilling process. Unlike internal coolant that delivers coolant directly to the cutting edge of the drill, external cooling involves spraying coolant onto the drill bit from outside.
The primary purpose of External cooling of carbide drills is to dissipate heat and maintain the temperature of the drill bit within an optimal range. During drilling, the friction between the drill and the workpiece generates a significant amount of heat that can lead to tool wear, premature tool failure, and reduced cutting performance.
By applying a continuous stream of coolant onto the drill bit, external cooling helps dissipate the heat, preventing the drill bit from overheating. This cooling effect increases the tool life and allows for more efficient and accurate drilling. Additionally, external cooling helps to maintain the hardness and rigidity of the carbide material, ensuring its cutting performance is not compromised.
External cooling of carbide drills also aids in chip removal. As the drill penetrates the material, it generates chips or debris that need to be cleared from the cutting zone. The coolant sprayed externally helps to flush away the chips, preventing chip clogging or jamming. This promotes smoother chip evacuation, which in turn enhances drilling efficiency and prevents issues such as chip re-cutting or tool jamming.

Application feature:

Used for: gray cast iron, ductile iron, stainless steel, alloy steel, and other common materials processing, centering ability, stable size accuracy and good surface quality, suitable for processing systems with excellent rigidity occasions, better internal cooling effect.

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