The holders are equipped with internal coolant channels delivering high-pressure fluid (5-30MPa) directly to the cutting edge which improves chip removal during deep-hole machining. O-ring seals, on threaded and straight shank designs (BT40, HSK63), provide complete precision seal integrity; some other designs contain flow sensors which allow coolant pressure monitoring. They are designed for use with aerospace alloys as well as heat-resistant steels and increase productivity in drilling and milling operations.
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