Kennametal has introduced an expansion of its solid carbide drilling portfolio, the HPX drill for high performance, large volume drilling in steel. Designed to quickly and efficiently punch holes up to 8 x D in any ISO-P steel material, the HPX drill provides up to twice the tool life and three times the productivity compared to competing products, even in dry or minimum quantity lubrication (MQL) applications.
Steels are used for a wide variety of automotive, commercial, and industrial applications, often in production volumes where maximum tool life and throughput is critical. Yet steel creates a high degree of mechanical loading during drilling operations resulting in forces that lead to rapid tool wear and chipping of the tool’s more vulnerable corners. Kennametal has eliminated this failure point by applying a small corner chamfer to the design of the HPX drill and straightening its cutting edges. Together with the rounded margin lands running down the length of the flutes, this serves to stabilize the drill while reducing friction.
Built-up edge is another common problem when drilling alloy steels. The HPX drill’s straight cutting edge helps eliminate some of this, but the real clincher is the drill’s optimized edge preparation. This gentle hone further reduces the friction that leads to built-up edge, as do the tool’s highly polished flutes. This is coupled with a carbide grade designed specifically for steel – KCP15B – and a proprietary multilayer AlTiN coating, which enables HPX drill to set a new standard for tool life in high-volume ISO-P drilling.
Special gashing on the HPX drill improves the chip formation and curls a smaller chip. The material specific HPX point geometry creates significantly lower cutting forces, which works great for machines with lower spindle capabilities, unstable cutting conditions, or unstable workpiece clamping. A continuous cross section makes the HPX drill more resistant against tool breakage, and the ultrahigh polished chip flutes ensure superior chip evacuation.
HPX drill offers efficient chip evacuation along with low-friction cutting, meeting the desiderata of manufacturers wishing to turn off their high-pressure coolant pumps in favor of dry cutting or MQL systems. In fact, the drill comes equipped with a leakproof MQL interface that meets DIN 6535 and 69090-03 standards.