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1/4" by 3/4" Solid Carbide Single Flute Downcut Super O Flute for Plastic, Wood, Aluminum, Solid Surface
1/4" x 1-1/4" Solid Carbide One Flute Downcut Super O Flute for Plastic, Wood, Aluminum

This Onsrud End Mill features a 1/4" solid carbide single flute downcut for plastic, wood, and aluminum cutting.


This end mill has one flute so that there is more area to grab the chips (the material being cut away).

End Mill Technical Features:
  • Materials this end mill can cut and Chip Load:
    • Soft/Hard Woods, MDF, Plywood:.004-.006
    • Soft Plastic: .008 - .012: Feedrate: 192 - 288 ipm
    • Hard Plastic: .010-.012
    • Aluminum:
  • End Mill Material: Solid Carbide
  • Cut Diameter: 1/4" (6.35mm)
  • Cut (Flute) Length: 1-1/4" (31.75mm)
  • Overall Length: 3" (76.2mm)
  • Shank: 1/4" (6.35mm)
  • Number of Flutes: 1
  • Manufacturer's Part Number: 64-026
  • Helix Angle: 21 degrees

Suggested Feedrates are based on a spindle speed of 24,00 RPMFeed Rate = (Spindle RPM) x (# of flutes) x (Chip Load)

Related Tutorials
greenBull cutting aluminum graphic poster Cutting Aluminum with the greenBull CNC and Onsrud End Mill
In this video, we are showing 2 examples of cutting aluminum. The first example will be dry cutting which is cutting in the absence of a coolant or cutting fluid.
greenBull cutting aluminum Cutting Aluminum Fail Using a Cheap End Mill
In this video we’re cutting an aluminum ring from a solid block of 6061 aluminum. The client gave us specifications that the ring needs to be 1 and a half inches in length, about 4 inches for the outside diameter, and about 1/4 inch for the wall thickness.
Bill of Materials
Many of you have asked me to provide a list of materials and costs for the CNC Machine. Here, I will provide a list of the materials, costs and where they can be purchased. In the list, I will also include various alternatives for different types of applications. This may include types of cutting tools, types of motors for the axes, etc. I will keep this list alive and updated in the "stuff for sale" in lieu of a better place. Please write me with suggestions, and if you know of better prices and places to get these materials. This list is a work in progress, since I wanted to make it available immediately. Most prices are from memory, until I find my receipts somewhere in one of my packing boxes, so you may see numbers change, but it gives you a general idea.