YG-1 E5978 Carbide Ball Nose End Mill, Long Reach, Uncoated (Bright) Finish, 37 Deg Helix, 2 Flutes, 4" Overall Length, 0.25" Cutting Diameter, 0.25" Shank Diameter

The YG-1 E5978 uncoated carbide long-reach ball nose end mill has a 37-degree helix angle and two flutes for high-performance machining and step milling on aluminum and other nonferrous materials. The long-reach shank provides greater access to recessed areas of the workpiece than tools with a standard shank length. (Feed should be reduced.) The 37-degree helix angle 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 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 cutting edge is treated with extra grinding passes, minimizing surface roughness and creating a low-friction surface to help prevent chips from sticking to the tool. The tool’s ball nose creates contoured surfaces where sharp corners are not required. 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. Carbide is harder than high-speed or cobalt steel, making it more wear resistant at high speeds and providing longer tool life. This tool has no coating or surface treatment. Cutting diameter tolerance is + 0.0000 to - 0.0012". The round shank accommodates a range of tool holders. 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. YG-1 manufactures drills, taps, end mills, and rotary tooling. The company, founded in 1981, is headquartered in South Korea and has a U.S. office in Vernon Hills, IL.

• Suitable for high-performance machining and step milling on aluminum and other nonferrous materials
• Long-reach end mills have an extended shank for access to recessed areas of the workpiece
• 37-degree helix provides increased cutting action and chip evacuation compared to lower helix angles
• Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tool’s ability to remove material
• Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures