Keyway tolerance end mills have a negative cutting diameter tolerance that allows more control over the size of the cut than conventional end mills
Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tool''s ability to remove material
High-speed steel is compatible with a variety of materials
Uncoated (bright) tools have no additional surface treatment or coating for use on a broad range of materials
Square nose end mills (also called square end) create sharp, unrounded cuts

Technical Details

Product Details

Package Dimensions
Width : 1.1 inch
Height : 1 inch
Length : 4.6 inch

Shipping Weight: 1.6 pounds (View shipping rates and policies)

ASIN : B00A0PHYZE

Product Description

The Niagara Cutter SK204 uncoated high-speed steel square nose end mill with keyway tolerance has two flutes and a 30-degree helix for cutting keyways and performing other general-purpose milling applications in a wide range of materials. The negative keyway tolerance allows more control over the size of the cut than conventional end mills, providing a close fit when milling keyways. The two flutes have better chip-carrying capacity than end mills with more flutes while offering additional support when the tool goes deep into the material in applications with a high depth of cut. 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.
High-speed steel (HSS) is a common general-purpose steel for cutting tools and is compatible with a variety of materials. With no coating or surface treatment, this uncoated tool can be used on a broad range of materials. The tool’s square end creates sharp, unrounded cuts. The center-cutting design has cutting teeth at the end of the tool, so it can be fed into the workpiece like a drill bit. Cutting diameter tolerance is +0.0000'' to -0.0015''. The tool 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.