Reinforced Indexable Insert Drill Delivers Improved Hole Quality

Sandvik Coromant offers a reinforced variant of its CoroDrill 880 indexable drill designed to improve production economy in large-diameter hole-making applications.

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Sandvik Coromant offers a reinforced variant of its CoroDrill 880 indexable drill designed to improve production economy in large-diameter hole-making applications. The latest tool body is compatible with a range of insert grades, including a grade based on the company’s Zertivo technology, which is designed to deliver optimized cutting edge integrity.

The reinforced drill features an enhanced body that is said to be as much as 30 percent stiffer than its predecessor for applications of four to five times the drill diameter. This provides more reliable drilling and improved hole quality, the company says. In addition, the combination of enhanced drill body and an insert grade chain for steel and cast iron results in improved insert tool life.

Two of the insert grades, GC4324 and GC4334, are designed with Inveio coating for better wear resistance. The third, GC4344, is produced with Zertivo technology, which offers optimal coating and substrate adhesion properties for increased edge-line security.

The CoroDrill 880 product range covers hole diameters from 12 to 84 mm (0.472"-3.307") off the shelf, as well as engineered solutions ranging to 129 mm (5.078"). The drills produce holes with tolerances of H12–13 and are suitable for holes ranging to five times the drill diameter.

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