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

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.

This up down compression spiral flush trim router bit is a great finish bit. Its small size makes it much easier to maneuver in tight places or for intricate work. I am a little new at getting the right bit for what I want to do, but this seems to be a sharp bit for smooth cuts with almost no tear out. This makes this a great bit for me.

I used this bit for the first time to clean up the edges of a CNC carving. I purposely cut too shallow with the CNC into a piece of walnut, then cut the carving out with a jab saw. This to me provided the worst possible scenario I could come up with regarding the wood. Hard wood with jagged overhangs that have been stressed already, and a curved edge. As for the router, I used a cordless handheld DeWalt 1/4 in router. Its large in the hand so kinda hard to hold and it is easier to accidentally tilt than a larger router. Then I flushed the corners holding the router in one hand and the carving in the other. This was the worst possible scenario I was willing to tolerate. I got the best results I have ever gotten from any flush trim bit - with the worst conditions I could come up with. There was zero tearout, and perfect alignment. Look at the pictures, they speak for themselves. I hate to write gushing reviews, but this is a standout tool that radically outperforms every other version of the tool I have ever used. Cant recommend this bit highly enough.

EANOSIC Up-Down Compression Spiral Flush Trim Router Bit Versatile dual ball bearings allow for flush cutting as well as template use. The EANOSIC Up-Down Compression Spiral Flush Trim Router Bit is a versatile and durable tool for template cutting and flush cutting. The 1/4 inch shank and solid carbide construction make it suitable for a wide range of applications from hard and soft wood to plastic. The nano coating on the bit provides added durability and resistance to wear and tear. The unique feature of this router bit is its up-down compression design which helps to compress the material being cut, which results in a smooth and splinter-free finish. This saves a lot of sanding. This router bit is especially great for template cutting projects as it provides a precise and accurate cut every time, following the template perfectly. Exceptional value for the price. EANOSIC makes exceptional router/CNC bits!

This bit is only used to produce repeatable results using a pattern attached to the workpiece as a guide. A bearing is used to follow the pattern and neither the process or this type of router bit are anything new. What sets this bit apart is that it cutting edges are slightly angled to slice both up and down. This results in a shearing cut rather than a chipping cut and should produce a smooth cut with little or no chip-out - well see. This is also a small diameter bit. Itll get into tighter areas, but its small size requires a bit more time and patience. You cant force this bit because its cutting tip speed is much slower than a bit of larger diameter. Both rotate at the same RPM, but the larger bit has to move faster around a larger circumstance. This little bit has the potential to produce edges ready for finish, but you cant rush it. Its also important to rough-cut work pieces very close to their finished size because you cant hog material with bits as small as this. This bit is for the last 1/8 give or take, youre not going to plow with it, at least not very far before it breaks from heat buildup. Use it as intended and with care and it shouldnt disappoint.

Combination up-down compression spiral trim bits are wonderful for using on material that is laminated top and bottom. It is always best to cut from the laminated surface towards the substrate in order to avoid chipping the laminate. This bit cuts the two services towards the center which is ideal when you want to avoid chipping both sides of your material. I use this for trimming melamine shelves or plywood that has a nice hardwood veneer on both sides. The bit is nicely made and well packaged. I would recommend it not just for CNC but for any edge trimming with a router.

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.

I have a couple of bits from this company, and I’m impressed with the quality. This particular 1/4” bottom bearing flush cut bit is a useful size for following tight patterns or for trimming flush to another piece. You do need to make sure your pattern is accurate and smooth as any imperfections will show, given the small bearing diameter. I’d consider this a tool for precision work, rather than hogging out the edges of countertops- solid carbide is not for forcing, and the 1/4” diameter means you need to take it slow. If you have never experienced the improved quality of cut from a good spiral ground router bit, you should give this a try.