US-based tooling components manufacturer Kennametal has released its new Mill 4-12, the next generation of tangential shoulder mills, which can produce high-quality floor surface finishes for nearly all steel and cast iron applications.
“The Mill 4-12 uses 15 per cent lower cutting forces, an important consideration with today’s lighter duty, 40-taper machine tools,” Kennametal Senior Global Product Manager Tim Marshall says. “That allows customers to feed faster without putting additional stress on the spindle. And in long overhang situations or where the part fixturing is less than optimal, lower forces equate to less chatter, reduced edge chipping, and smoother surface finishes.”
The Mill 4-12 has tangentially mounted inserts with four cutting edges each for reduced tooling costs. Seven corner radii from 0.4 to 3.1mm are available, along with coolant-through, medium and coarse pitch cutter bodies 50 to 200mm in diameter. With an axial depth of cut range from 0.5 to 12mm, the Mill 4-12 covers most shoulder milling applications.
Factors contributing to significant performance increases, even in aggressive cutting conditions include the tangential, “on-edge” design of the insert, which allows it to take advantage of the strength of the carbide thickness more so than the radially mounted inserts on traditional milling cutters, a shallow pocket design, which allows the core size of the cutter body to be very robust, and the axial and radial seating surface designs, which provide exceptional stability.
The Mill 4-12 is the perfect complement to Kennametal’s existing shoulder milling portfolio, which includes the Mill 4-11 and Mill 4-15, known for their ability to generate shoulders with high-quality wall surface finishes.
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