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Your cart is empty.KEO ZErO flute countersink and deburring tools are simple, all-purpose tools made of Cobalt that provide flawless countersinking and deburring. The chatter-free cutting action requires minimal power. The microsmooth CNC precision ground construction produces clean, smooth cutting without smearing on a variety of materials. The tool especially excels in countersinking or deburring holes in aluminum, plastics and other nonmetallics. Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 90 degree angle.
Corey B
Reviewed in the United States on July 8, 2022
Good quality, deburs drilled holes in metal.
cwbuff
Reviewed in the United States on May 20, 2022
I needed to countersink some hard maple. This is the first countersink bit of this type that I have used. It cuts perfectly round countersinks. I'm impressed.
M. C. Edwards
Reviewed in the United States on March 25, 2022
I only got one countersink with this bit. I am countersinking a 3/8" hole in a 3/8" carbon steel plate. It dulled after the first countersink. I am going to try a HSS 6 flute countersink next.
T. Wallis
Reviewed in the United States on April 13, 2021
These Keo countersink/de-burring bits are just awesome. They leave a much more refined finish than the fluted types I have used in the past. No chatter was evident when using on aluminum and steel. I am not sure how these would perform in wood applications, but will be attempting to do so in the near future. They're quite pricey for the application, but I have found no other that performs as well.There has been mentioning of these bits becoming dull, but I have not had that issue with its uses. I make sure to lubricate the metal and bit well and do not keep constant pressure on the bit, allowing it time to cool.
MSchlutter
Reviewed in the United States on August 10, 2020
It countersunk the first hole really well, unfortunately bits are usually required for multiple uses.
gnef
Reviewed in the United States on November 10, 2020
I bought these primarily for when I build jigs for woodworking. I often need the holding screws to be flush, or even a bit sunk below the surface for my jigs to work correctly. I build jigs for my router, bandsaw, drill press, miter saw, etc.I have used the multi blade countersinks in the past, but was not satisfied with the finish that it left, often lobed, especially on plywood. The design of this countersink leaves a very nice finish.Now, I only use these for wood, so I have no idea how well it would work on steel. For wood, they work exceptionally well. In fact, they work so well that I have a small set of different diameters on hand.These are not the cheapest countersinks. I did like that they were made from cobalt steel. I also like that it is separate from the drill bit, it gives me more flexibility with how I use them.
dedla
Reviewed in the United States on January 10, 2020
The left finger is pointing at the hole which this bit cleaned up seamlessly with no effort. The right finger is pointing at the regular resulting rim which the Irwin 5-piece set was making. The 5-piece set has since been returned to the store, complete trash.
konaram
Reviewed in the United States on August 21, 2017
Works great. I was not aware of this style of counter sink until searching on Amazon. Decided to give it a try to cut some countersinks in 3/16" mild steel. Smooth cutting, no chatter as I've experienced with some multi edged bits. Will buy again.
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