EANOSIC Upcut Spiral Router Bit 1/4 inch Shank, 1/4 inch Cutting Diameter, Extra Long 3 inch Solid Carbide with Nano Blue Coating CNC Router Bits End Mill for Wood Cut, Carving

upcut bits are the only way to assure a clean cut at the edge.... due to how they cut... they cut upwards towards the shaft so in a handheld router, put the good side of the workpiece down in a router table or CNC do the opposite... this bit has produce superb finishes, highly recommended, great price point... 5 stars

Excellent for getting way down into a design! Especially when grooving areas for slip in pieces like a two part frame I do - Nice to have a bit that my machine limits can work with also without having to place my router physically lower to reach - Leaves nice and clean cut walls and works it’s way through fairly easily - Definitely would recommend giving this a go! 9/10 a winner!

I bought this bit rather than others of the same style because I needed the extra length. I was concerned about the durability due to the extra length of the bit. It has performed as expected, and hasnt broken. And has stayed sharp. A very good buy.

Tried out this 1/4 bit on a 3hp cnc. 15,000 rpm @ 100 inches per min. Clean cut, no chatter or issues. Bit did not come with feed/speed info so ran it like my Amana bits. Will see how it holds up over the next few weeks of use.

Great price point for a good quality bit for my CNC machine. Cuts clean and the bit is very sharp. My only comment or complaint would be that they would put a description label on the case for storage instead of the envelope.

While not a terrible bit it isnt any better than a standard straight 2 flute carbide bit. I was working with 3/4 ash, prepping it for gluing into panels. This bit was ok for light cleanup on the edges but thats about it, maybe removing 1/32 or 1/64 of an inch.

I used this bit in my large woodworking CNC machine. The photo of the circular cuts is a test pattern I use for calibrating Z-steps. There is some tearing on the edges of the circles, but these cuts are in hardwood plywood and I expected this. The second photo is a close-up of a 1/4 slot cut into 3/4 plywood into which some 1/4 plywood will slide. The groove is plenty clean for its intended use in a cabinet carcass.

The edges on this bit are very, very sharp, so be sure to take care when handling it. Its all too easy to slice yourself when taking the bit out of its case, or installing/removing the bit from the router. Used this bit to rout cutouts in copper countertops (the copper layer is about 1/32 thick). Even with a good bit, it is slow work, but this bit did the job, and left a nice clean edge on the cutout.

I got this upcut spiral router bit to use primarily for mortising. Measuring the depth of cut using a ½ thick mortising template, I should get 1 1/8 depth of cut, adequate for most mortises. I tried the bit on a scrap of red oak where I had made some test plunge cut holes for shelf pin brackets for a book case. The original cuts were with a straight ¼ router bit. The cuts with the upcut spiral router bit cut quickly but burned the wood, which surprised me. See the photo. Even though the straight router bit had been previously used and had some pitch on the carbide blade, it made a cleaner hole. Given the use in a mortise, this is probably is not an issue, but I had expected a cooler cut from the spiral bit.

I like it