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Lightweight, carbon-fiber-reinforced polymer materials, which are prevalent in the aerospace industry, tend to delaminate when being processed, particularly when drilling holes. Kennametal Inc. offers the Split-Point Fiber Drill, with a lessened cutting force, as a way to reduce or eliminate this delamination. The drill’s smooth, CVD multi-layer diamond coating provides wear resistance and reduces friction, which can increase tool life and improve chip flow. According to the company, point thinning increases centering capability and allows reduced thrust, thereby improving hole quality. The drill is available in 24 different standard diameters, with standard lengths equal to 3X and 5X the diameter.
Can Additive Manufacturing Increase Milling Feed Rates?
With PCD tooling, yes it can. The diamond cutting edges demand a large number flutes to realize their full effectiveness. Traditional methods for making cutter bodies limit the number of flutes, but 3D printing is delivering tools with higher flute density and other enhancements as well.