5110264 High Speed Steel (HSS) Square Nose End Mill, Inch, Double End, Weldon Shank, Uncoated (Bright) Finish, 3 Flutes, 5" Overall Length, 9/16" Cutting Diameter, 5/8" Shank Diameter

The Union Butterfield 933 uncoated high-speed steel double-end square end mill has three flutes and a 30-degree helix angle for general-purpose machining on a range of materials. 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. 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 double-end design has cutting edges on both ends, allowing a new cutting surface to be substituted when the first shows wear, which doubles the tool’s life compared to single-end square end mills. The tool’s square end creates sharp, unrounded cuts. 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 center-cutting design has cutting teeth at the end of the tool, so it can be fed into the workpiece like a drill bit; it can also be used for slotting and ramping. The cutting diameter tolerance is +0.003” to -0.000”. This tool has a Weldon shank that provides a secure hold in the toolholder and helps prevent slippage. It meets ANSI specification B94.19 for quality assurance. 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. Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards. The company has locations around the world, and makes tools that meet to ANSI, NAS, and DIN standards.

• 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
• 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
• Double-end square end mills create sharp, unrounded cuts and have cutting edges on both ends for longer tool life
• Center-cutting design allows the end mill to plunge into material like a drill bit while also performing conventional surface milling