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1/4" Shank - 1/2" Cut Length
(65-012) Onsrud Single Flute: 1/8" Cut Diameter, 1/2" (13mm), Cut Length, 1/4" Shank
1/8" Shank x 1/2" Cut Length
Generic Single flute: 1/2" cut length, 1/8" shank

These end mills have a single flute to cut plastics and wood very efficiently.


For the Onsrud end mills listed, here are the chip loads and suggested feed rates:

Soft Wood, Hard Wood, MDF (Medium Density Fiberboard), Soft Plywood, Hard Plywood (18,000 RPM):
Chip load: .002 to .004
Suggested Low End Feed Rate: 36 IPM
Suggested High End Feed Rate: 72 IPM

Soft Plastic (12,500 RPM) :
Chip Load: .002 to .003
Suggested Low End Feed Rate: 25 IPM
Suggested High End Feed Rate: 37.5 IPM

Hard Plastic (18,000 RPM):
Chip Load: .006 to .008
Suggested Low End Feed Rate: 108 IPM
Suggested High End Feed Rate: 144 IPM

Sheet Aluminum (16,000 RPM):
Chip Load: .002 to .004
Suggested Low End Feed Rate: 32 IPM
Suggested High End Feed Rate: 64 IPM

Related Tutorials
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.
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.
Some Information about End Mills (Rotational Cutters) for CNC Machines
I receive a healthy dose of questions about end mills and which ones that I use. I usually respond with answers like, my end mill will probably differ from your end mill. So, what is this thing called an end mill anyhow? If you are new to CNC machining and routing, you may have never heard of the thing. I could imagine googling something like, "CNC bits". Using the terminology "bit" is not all that incorrect. Bits are commonly referred to as drill bits, but routers use router bits. If you're looking to cut various metals and composites, end mills are the tools of choice. However, end mills will also work on wood, depending on the type of end mill selected.