YG-1 E5078 Carbide Ball Nose End Mill, Uncoated (Bright) Finish, 30 Deg Helix, 3 Flutes, 3.5" Overall Length, 0.375" Cutting Diameter, 0.375" Shank Diameter

The YG-1 E5078 uncoated carbide ball nose tapered end mill has three flutes and a 30-degree helix angle, and is available in a range of degrees of taper for machining dies and molds. Tapered end mills have flutes that narrow from the end of the shank to the tip of the tool to produce draft angles or taper existing holes in a workpiece. The E5078 is available in a range of degrees of taper, which refers to the degree of angle on each side of the end mill. This end mill is commonly used to produce the draft or clearance angles in die and mold walls to facilitate ejection of the part after molding. Larger degrees of taper create larger angles, making ejection easier. For tapered end mills, cutting diameter is measured at the tip of the tool, not the shank. The end mill’s three flutes provide better chip-carrying capacity than four flutes and a finer finish than two. They efficiently remove excess material from the cutting area and provide a third cutting edge to create an improved finish that may eliminate the need for a second finishing cut in some applications. The tool’s ball nose creates contoured surfaces where sharp corners are not required. The 30-degree helix angle balances lower angles’ strong cutting edge for difficult-to-machine materials with higher angles’ increased cutting action. 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. 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.

• The flutes are tapered to create the precise angled cuts required for machining dies and molds
• Suitable for machining die and mold materials
• Three flutes provide better chip-carrying capacity than four flutes and a finer finish than two, reducing the need for a second finishing cut in some applications
• Ball nose end mills (also called ball end) create contoured surfaces­­­
• Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures