Niagara Cutter 72750 Cobalt Steel Corner Rounding End Mill, Inch, Weldon Shank, Uncoated (Bright) Finish, Roughing and Finishing Cut, Non-Center Cutting, 30 Degree Helix, 4 Flutes, 2.5" Overall Length, 0.250" Cutting Diameter, 0.375" Shank Diameter

  • List Price: $45.72
  • Sale Price: $33.12
  • Amount Saved: $12.60
  • Availability: Usually ships in 24 hours


  • Corner rounding end mills are designed to take the edge off sharp external corners
  • Four straight flutes produce a fine finish
  • Cobalt steel resists abrasion and high cutting temperatures, and has higher feed rates than high-speed steel
  • Uncoated (bright) tools have no additional surface treatment or coating for use on a broad range of materials
  • The non-center-cutting design is for applications such as peripheral milling and finishing

Product Description

The Niagara Cutter CRCO126 uncoated cobalt steel corner rounding end mill has four straight flutes and a non-center-cutting design for creating rounded exterior corners on a wide range of materials. Corner rounding end mills have a concave, curved indent on the cutting end to create a more rounded or less rounded corner, depending on the radius selected. Four straight flutes produce a fine finish.

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. With no coating or surface treatment, this uncoated tool can be used on a broad range of materials. The non-center-cutting design is for applications such as peripheral milling and finishing. Cutting diameter tolerance is +0.002" to -0.000". Radius tolerance is +0.001” to -0.001”. 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.

Product Detail

  • ASIN: B00074WJSU
  • Item model number: 72750
Customers Who Viewed This Item Also Viewed


Write a Reply or Comment:

Your email address will not be published.*