Up Down Compression Spiral Flush Trim Router Bit, 1/4 Inch Shank Solid Carbide Flush Trim Router Bits CNC Spiral Bit with Nano Coating by EANOSIC

Bit works great, stays sharp

The 1/4-inch Up Down Compression Spiral Flush Trim Router Bit performed well in my testing. The bit cuts fast and leaves a smooth surface. I tested the bit with 7/8-inch-thick air-dried Cherry wood. The bit performed as described.

This is my second bit from Eanosic and just like my first one I am happy with it. It comes in a nice case for protection, and it is very sharp. It cuts material cleanly and the up down compression leaves nice edges on both the top and bottom as long as you set the bit up correctly. It is not meant to take much material off so you will need to use a bandsaw or jigsaw to cut away most of the material first. I only use it for pattern routing which is what it is meant for. Pay attention to the size of the material you are using because you may need to get a larger bit. I am using it for 3/4 material and it works great. Very happy with this bit.

This is the first spiral bit Ive used, and I gotta say Im a convert. It just chews through material, and produces a nice clean edge. Im very pleased with this.

This is a very interesting take on a compression spiral bit, one Ive not seen before. Its not what you would typically expect from a compression spiral, with upward and downward flutes meeting at roughly the center of the cutting area. Instead, its more like a down-spiral bit, with a pair of shearing rakers like a Freud Quadracut bit at the tip end. I wouldnt want to use it for something you need a real compression spiral to get the best performance out of, but this has performed very nicely for me in the little bit of testing I have done so far. It was able to make nice, clean pattern cuts in walnut, oak, and pine with no fuzzing or tearout. The bit comes razor sharp, as youd expect from a spiral, and so far has held up well. I will be really interesting to see how it holds up longer term, but at least in the short term it has held and cut very nicely.

As it is an off brand from Amazon, I dont have high hopes for longevity. That being said, for a hobbyist the price is right and it works great so far. Only time will tell on durability.

I took this little bit out for a spin and was very happy with the results. The pictures are with a piece of 1/2” plywood. I grabbed another piece to use below it to test out the bearing portion of the bit as well, but didn’t look to see that the edge was rough, hence the less than straight cut. This bit left a splinter free cut on both sides of the plywood. It cut quickly through the 1/8” of material I was trimming off. Just keep a few things in mind. This is only a 1/4” bit. Take it easy or you’ll probably snap it. The part of the bit that makes the clean upward cuts (just above the bearing) is small. As in about a 1/4”. You have to have the bit depth adjusted correctly so that the bottom of you board is inside that cutting area or else you’ll be using the downcut portion of the bit and probably get splintering.

Hmm, well this has a good cutting edge, seems to make a perfect edge, no wobble in the bit and good longevity. Good buy when compared to the same bit I got from HD at a better price.