Niagara Cutter 37121 High Speed Steel (HSS) Square Nose End Mill, Inch, Weldon Shank, Uncoated (Bright) Finish, Roughing and Finishing Cut, Non-Center Cutting, 30 Degree Helix, 4 Flutes, 3.25" Overall Length, 0.375" Cutting Diameter, 0.3750" Shank Diameter
The Niagara Cutter S404 uncoated (bright) high-speed steel square nose end mill has a 30-degree helix angle for general-purpose machining on a variety of materials. The number of flutes varies; fewer flutes provide better chip-carrying capacity, while more flutes produce a finer finish. High-speed steel (HSS) is a common general purpose steel for cutting tools, is compatible with a variety of materials and tends to be less expensive than most other cutter materials. With no coating or surface treatment, this uncoated tool can be used on a broad range of materials.The 30-degree helix angle supports general-purpose applications. It balances lower angles’ strong cutting edge for difficult-to-machine materials with higher angles’ increased cutting action. The tool’s square end has straight cutting edges that create sharp, unrounded cuts, while the center-cutting design has cutting teeth at the end of the tool that support making pocket cuts, profiling, and slotting. 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.