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Niagara Cutter 42730 Cobalt Steel Square Nose End Mill, Inch, Weldon Shank, Uncoated (Bright) Finish, Roughing and Finishing Cut, 36 Degree Helix, 3 Flutes, 8.5" Overall Length, 1.000" Cutting Diameter, 1.000" Shank Diameter Product By : Niagara Cutter Sale Price : Check updated prices now

The Niagara Cutter RFM442 uncoated (bright) cobalt steel truncated rougher-finisher end mill for aluminum has a 36-degree helix and three flutes, and removes material in less time than conventional end mills while producing a finer finish than fine- or coarse-pitch roughers. The 36-degree helix angle makes the end mill suitable for machining aluminum or other nonferrous metals. It offers increased cutting action compared to end mills with lower helix angles, as it moves excess material quickly up the spiral and away from the workpiece. The end mill has three flutes to optimize the feed and cut rate.

Truncated rougher-finisher end mills are special-purpose tools whose chip-breaking cutting edges create small chips for heavy cuts and remove more material in less time than conventional end mills. They produce a finer finish than fine- or coarse-pitch roughers, reducing the need for a second finishing cut in some applications. The cobalt steel substrate can be run at faster speeds and stays sharp longer than high-speed steel tools, while offering resistance to heat and abrasion; this tool has no coating or surface treatment. The tool’s square end creates sharp, unrounded cuts and has a corner chamfer on the cutting edges to provide more strength than standard square end tools in applications where cutting forces are high. The center-cutting design has cutting teeth at the end of the tool, so it can be fed straight into the workpiece like a drill bit for plunge cutting, and used for applications such as slotting and profiling. Cutting diameter tolerance is +0.001" to -0.000". The end mill has a Weldon shank.

End mills are designed to remove material and create multi-dimensional shapes and profiles. They have cutting edges along the outside diameter and flutes that remove chips from the cutting area and allow cooling fluids to enter. If heat is not reduced effectively, the tool’s cutting edges will dull and additional material buildup can occur. The number of flutes can range from two to eight. Two-flute designs offer the most efficient chip removal, but more flutes provide a smoother finish. The shank is the end of the tool held in place by a tool holder or machine. Center-cutting end mills can create three-dimensional shapes and profiles, and make plunge cuts similar to a drill bit. Non-center-cutting end mills are for applications such as peripheral milling and finishing, but cannot make plunge cuts.

Niagara Cutter has been designing and manufacturing precision cutting tools since 1954. Specializing in end mills, cutting mills, and saws, the company is based in New York and manufactures its tools at facilities in Pennsylvania and Massachusetts. This allows the company control over production, from substrate to coating, which is essential for customers in a variety of industries, especially aerospace and automotive.

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