KENNAMETAL partnered with Haimer® to develop and introduce a modular cutting tooling system in 2014, promising it would be “the most rigid and most precise interface in the marketplace.” Today, with continued advancements, it reports that the Duo-Lock™ series is the only modular end-mill family that can compete “at solid-carbide levels.” It added that the Duo-Lock tools offer full-width slotting at depths up to 1x cutter diameter, and side milling up to 50% radial engagement at 1.5x the diameter deep, even in stainless steel, titanium, and high-temp aerospace alloys.
“We have over 400 line items coming in the first wave, with many more coming early next year,” according to Thilo Mueller, manager of solid-carbide end milling at Kennametal. “These include the most popular size end mills in both inch and metric, as well as a broad array of adapters, integral shank holders, and extensions.”
Many of those extensions are equipped with Haimer’s Safe-Lock™ secure clamping mechanism that eliminates concerns over tool pullout and creep in high-performance milling applications. HSK, CAT, BT, and comparable spindle tapers are also available.
Kennametal deployed FEA design methods to derive Duo-Lock’s "intelligent" thread design, optimizing the connection to eliminate any possibility of tool failure even at elevated loads. As a result, according to Mueller, Duo-Lock handles 25% more torque than its closest competitor, permitting higher feed-rates and axial depths of cut, especially in long reach conditions.
The cutting geometry uses an upgraded Harvi front end with an asymmetrical flute design. This breaks up cutting harmonics, reduces chatter, and provides 20% or greater chip load per tooth compared to the solid-carbide versions. The Harvi II 5 flute cutters are updated with a variable helix, offering full slotting capabilities in titanium. The eccentric relief behind the cutting edge with Harvi III is also a proven performer in titanium and other heat resistant alloys, and is sure to satisfy the needs of customers looking for larger modular versions as well.
Multiple carbide grades are also available, including Kennametal’s proprietary Beyond grades KCSM15 and KCPM15, making DUO-LOCK a go-to solution for everything from heavy roughing to semi-finishing. “Because of the very small amount of tool run-out, some of our customers are even seeing success in fine finishing applications,” said Mueller.
Learn more at www.kennametal.com/duo-lock