Kennametal’s Next generation High-Performance HPR Solid Carbide Drill
Kennametal Inc. expands its solid carbide drilling portfolio with the introduction of HPR Solid Carbide Drill. The drill for (high-volume) cast iron workpieces is designed for high-speed and high-feed drilling up to 8 x D in any ISO-K material. Its patented point thinning, special gashing, and a 143°-point angle provides excellent self-centering capabilities and reduces thrust, keeping the drill running straight even at higher feed rates. Moreover, four margin lands deliver maximum stability when drilling cross holes and inclined exits.
The low-thrust drill point design for maximum
hole straightness.
The HPR solid carbide drill for cast iron components is available in diameters from 3-20 mm and lengths up to 8 x D. A patented corner radius greatly extends tool life and offers excellent hole quality, meeting a hole tolerance range of IT9-IT10 while effectively eliminating the workpiece chipping when leaving the hole.
The drill’s proprietary AlTiN/AlTiSiN multilayer coating withstands the extreme abrasion and high thermal loads encountered when drilling gray cast iron, ductile iron, CGI, ADI, and GGG, as well as being resistant against the inclusions and pores. Ultra-high polished flutes and wide flute cross section facilitate efficient chip evacuation and further reduce heat and resulting thermal shock. The new HPR drill comes with standard coolant through and with a DIN 6535 and 69090-03 MQL (Minimum Quantity Lubrication) interface, allowing it to excel in either wet or dry machining conditions.
“The drill’s low-thrust point design gives users the option to apply the drill under less-than-ideal clamping conditions, or on thin walled applications, or simply when spindle power is the limiting factor,“ asserted Frank Martin, Product Manager, Kennametal Inc. “Whether drilling large quantities of holes or overcoming typical challenges in any type of cast iron workpiece, the HPR drill is clearly the solution.”
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