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

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.

I have a triple fluted flush cut 1/4 inch router bit that I usually use in my construction business. I have never used a spiraled flush cut bit, so I thought it might be fun to try out. I used this spiraled flush cut bit it my trim router at first and the bit had no problems cutting 3/4 pine trim boards. However, I did notice that the cut was a little wavy because the trim router has a small base plate so I tried it in my full sized router with a 5ish plate. The cut came out much straighter and I would recommend using a bigger base plate for it unless it doesnt matter if there are a few waves in the cut. It cut through 5/8ths OSB plywood and didnt leave any burrs on the surface. There were some on the bottom of the plywood but I assume that is from the spiral moving downward. I like the fact that the bit is only 1/4 in diameter the whole length and that it doesnt have to take out as much material as my 1/4 fluted bit that is 1/2 at the cutting blades. So far... I really like this bit and am hoping that it stays sharp for a long time so I can use it for many years.

Bit works great, stays sharp

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.

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.

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.

This bit is 1/4 from head to toe. So the bearing is also 1/4. Ive never seen one this small. Who knows how long it will last? Ill update if there are any problems. The blue coating and/or the flute design makes this bit cut very clean! For the few materials I tried, there were no blowouts or chads left hanging on top or bottom! I didnt have any kind of chatter or wobbling that I expected. However with the tiny bearing diameter, it will definitely transfer smaller imperfections from your template to the workpiece. More so than with a 1/2 bearing. This is just a lot easier to work with. I think youll have to be careful not to rely on bit color to tell you when youre making too much heat. You wont see discoloration on this coating. I guess youd have already made way too much heat if your bit was bluing. Best to keep your pass speed under control anyway.

Having once snapped a premium 3/8 inch spiral on its second use, I’ve managed to suppress any interest in a long, tiny 1/4 inch one. The opportunity to test one through the Vine program overcame a couple of decades of reluctance, and, with less than an hours use, trepidation has transformed to enthusiasm. This is one useful bit. Not surprisingly, it allows me to enter smaller spaces for interior cuts, and to follow more finely detailed templates for external cuts than I could ever hope to achieve with a larger bit. The up/ down spiral does indeed leave a far smoother finish—top, bottom, and in between—than I can achieve with my straight bits. I have used it only for light, slow cuts with the same knowledge “Amazon Customer” shared in his/her January 9th review, which I recommend reading. As others, I still worry the 1/4 bearing is going to hold up. I wish they had included 3-4 replacements with the bit. Time will tell if my concern is warranted, but over that time I’ll be checking often to ensure the bearing rotates smoothly.. I won’t be using this bit often, so it may be some time before I can report on actual bearing life. For now, I can only affirm others in their praise for this bit. It is well worth its modest price,

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.

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.