CoroMill 331 Click image to enlarge

The new CoroMill 331 indexable insert cutter from Sandvik Coromant offers precision groove milling in an easy to use format.

New features include internal coolant and light cutting geometries for stable and secure machining.
“We have introduced a number of new features that help meet customer demands such as process security, component quality, and cost,” says Jenny Häll, product manager, Groove Milling at Sandvik Coromant. “Arguably most notable is the addition of internal coolant, which helps regulate heat in the cutting zone for long and predictable insert tool life. This factor is especially beneficial in ISO M and ISO S materials [stainless steel and heat-resistant alloys], which exhibit poor thermal conductivity. Additionally, internal coolant provides excellent chip evacuation, a key factor for groove quality and process security.”
Enhanced process security promotes trouble-free machining, a factor that is further supported through the introduction of light cutting geometries. For ISO M and ISO S materials, L30 and L50 geometries replace the company’s existing assortment for good conditions/light applications and tougher conditions/heavy applications, respectively. For ISO P (steel) and ISO K (cast iron) materials, the M30 geometry now complements the existing assortment. M30 is designed for the purpose of delivering secure machining where weak setups and long overhangs are present.
Another factor underpinning process security is enhanced cutter rigidity. In applications where long overhang or elevated levels of vibration are likely to be present, CoroMill 331 can be deployed with Silent Tools damped adapters. Here, the shorter arbor cutter bodies of CoroMill 331 bring the cutting edge closer to the Silent Tools damping mechanism, providing an even more stable tool with a reliable performance.
Extra process security and stability deliver higher component quality to manufacturers in industries such as energy, aerospace, and automotive. Typical parts to benefit include hour glass valve bodies, aerospace brackets, flap tracks, and steering knuckles, to list but a few. CoroMill 331 offers high levels of versatility that render it suitable not just for groove milling, but for parting, double half-side machining, shoulder milling, face milling, back-face milling, gang milling, and circular interpolation.
Better security in machining also promotes productivity. CoroMill 331 offers true 90° corners and excellent metal removal rates that make this cutter the most productive of its kind.
Ease of use is a further requirement of machine shops everywhere. For this reason, CoroMill 331 makes use of spring-loaded cassettes with serrations that provide security and easy setting for the desired width. Moreover, a pin-controlled adjustment range enables manufacturers to set the cutter with high accuracy for precise groove dimensions.

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