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44 ISCAR GENERAL DRILLING HANDBOOKSustainabilityIf the cutting edge is damaged or worn, it is not necessary to replace the whole tool, and only the exchangeable drill head needs to be replaced.No Set-Up TimeThere is no need for an additional adjustment after replacing the drilling head - no setup time %u2013 and an operator can change the drilling head without removing the shank from a machine tool spindle.No Need for RegrindingUsing exchangeable drilling heads, there is possible to safely forget about tool regrinding; when the cutting edge wears out, the drilling head is quickly and most importantly easily replaced with a new one.Stock ManagementThe modular concept of the drills makes it quick and easy to assemble the right tool from the available exchangeable drilling heads and shanks. Hence, customers don't have to order costly, specialized tools and wait months for delivery. If a drill is urgently needed for immediate production, a suitable solution is close at hand. Using exchangeable drilling heads can significantly reduce the amount of stock end users typically keep on hand, thereby reducing manufacturing costs. Low CostUsing drilling heads can significantly reduce cost since the drilling heads are cheaper than a solid drill.