Kennametal introduces the B21*SGL Solid carbide drill for improved productivity

Kennametal has introduced another high-performance cutting tool, the B21*SGL solid carbide drill with coolant-through. Designed for stainless steel, nickel, and cobalt-based alloys, the B21*SGL with patented point geometry and monolayer PVD AlTiN coating, offers improved productivity and longer tool life for aerospace applications requiring predictable, high-production drilling.

The new design virtually eliminates the risk of chipping and flaking that lead to drill failure. With a unique point gash, its low thrust level enables productive drilling even in delicate workpiece geometries.

One problem with these materials is their tendency to stick to the cutting tool, leading to built-up edge and corner chipping. The B21*SGL’s proprietary gash geometry, polished cutting edge, negative rake corner margin, and chip-friendly flute design mitigate these effects, while encouraging chip evacuation and reducing cutting forces. Kennametal’s wear-resistant, high-aluminium content KCMS15 grade produces a drill that makes more holes per tool and does so more quickly and predictably.

Holemaking is a critical machining process, especially so for those producing turbines. Because the drilling operation typically comes near the end of the production cycle, when workpieces are at maximum value, a broken drill can damage or even destroy components worth tens of thousands of dollars.

“This new solid carbide drill will bring incredible value to anyone needing to drill large numbers of holes in Inconel, titanium, PH-series stainless steels, and other heat-resistant superalloys. Especially relevant to aerospace manufacturers, given the tremendous pressure to ramp up production of the LEAP aircraft engine programme,” says Kennametal’s Matthieu Guillon, Key Account Manager, Aerospace

The B21*SGL solid carbide drill from Kennametal is available in a broad range of inch and metric sizes with hole depth up to 8xD.

For more information contact Kennametal South Africa on TEL: 011 748 9300 or visit