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1/4″ Up-Cut Spiral Bit *Astra Coated*

A must have in any shop, the versatile 1/4″ spiral up-cut CNC Router bit can be used in any CNC, hand held router or router table.

  • Astra Coated
  • Solid Carbide
  • Tip diameter: 1/4″
  • Shank Diameter: 1/4″
  • Length of cut: 1″
  • Tool Size: 1/4″ x 2-1/2″
  • Made In USA

These tools are coated with a proprietary high performance *Astra coating* that allows higher speed & feed rates as well as 2x the extended tool life & increased lubricity in abrasive material

Jonathan's Hot Take:

Up-cut spiral bits are my most used bits when I'm trying to clear chips or get a clean edge on the side of the stock furthest from my tool.

These bits provide the HIGHEST VALUE because the Astra Coating makes them last at least 2-4x longer than uncoated bits. This is one of those times that spending a little more upfront saves you a lot of money down the line.

Spiral bits perform 100x better and 100x longer than straight bits. I recommend staying away from straight bits in general, because they dull so much faster and their aggressive cutting profile can be much less safe.

Check out the video in additional resources for more info.

Solid Carbide upcut bit used for carving and sign making on hard & soft woods. Excellent for milling wood, aluminum and other non-ferrous materials. These tools are coated with a proprietary high performance *Astra coating* that allows higher speed & feed rates as well as extended tool life & increased lubricity in abrasive material. Our tools are all Made in the USA with the finest carbide available.

What is an UpCut bit?

UpCut bits allow for rapid cuts since the tool clears the chips away from the material. While Ideal for cutting thicker materials, this type of tool is not recommended for thinner or softer materials. They are more likely to tear the top surface with the cutting edges because they’re pulling the wood fibers up while cutting. When cutting laminated materials, such as plywood with a thin top veneer, that can matter a lot. This type of bit is used whenever the best finish is needed on the bottom side of a part.

Made in the USA by KM Tools

This data serves as a general guidance only.
  • Soft/Hard Woods/ MDF – Spindle Speed- RPM: 16-18K – Feed Rate – IPM : 150-180″
  • Plastics / Aluminum – Spindle Speed- RPM: 16-18K – Feed Rate – IPM : 120-150″
  • Max Cut depth per pass 1/4″
Customer Reviews
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    Kenn C.
    United States
    I recommend this product

    The Bee's Knees!

    Tried my new spiral upcut router bit first rattle out of the bag fresh off the delivery van. Used it to cut 20 each, 8" circles in various hardwoods. Worked like a dream, with fast cuts (3 passes thru 3/4" stock), no burning, and a very clean line top and bottom. A vast improvement over my tired old straight bit. I was getting a lot of burning and raggedness, even with an agonizingly slow feed rate. I got almost none of that from the spiral bit, and a much faster feed rate as well. Highly recommended!