Key Features

• Roughing end mills have chip-breaking cutting edges that remove material in less time than conventional end mills
• Coarse-pitch tooth design is suitable for machining soft, gummy materials
• 36-degree helix angle provides increased cutting action and chip evacuation compared to the standard 30-degree helix
• Cobalt steel resists abrasion and high cutting temperatures and has higher feed rates than high-speed steel
• Center-cutting design allows the end mill to plunge into material like a drill bit while also performing conventional surface milling

Product Description

The Niagara Cutter RTM713 uncoated (bright) cobalt steel coarse-pitch rougher end mill has three flutes, a 36-degree helix angle, and a chip-breaking tooth design suitable for machining soft, gummy materials such as aluminum or other nonferrous metals. Rougher end mills are special-purpose tools whose chip-breaking cutting edges create small chips for heavy cuts and remove more material in less time than conventional end mills with minimal vibration (chatter), to support heavier cuts at higher speeds. The end mill produces a rough finish that can be smoothed by a second finishing cut. The 36-degree helix angle provides more support behind the cutting edge than higher angles and increases cutting action and chip evacuation compared to the standard 30-degree helix. It efficiently cuts difficult-to-machine material moving it up the spiral and away from the workpiece. The end mill has three flutes to optimize the feed and cut rate.

The cobalt steel substrate can be run at faster speeds and stays sharp longer than high-speed steel tools, while offering resistance to heat and abrasion; the tool has no surface treatment or coating. The center-cutting design has cutting teeth at the end of the tool so it can be fed straight into the workpiece like a drill bit. The tool’s square end creates sharp unrounded cuts and has a corner chamfer on the cutting edges to provide more strength than standard square end tools in applications where cutting forces are high. Cutting diameter tolerance is +0.005” to -0.000". This 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 two facilities in Pennsylvania and Massachusetts. This allows the company control over production an essential benefit for customers in a variety of industries especially aerospace and automotive.