CNC Spoilboard Surfacing Router Bit 1/4" Shank, Slab Flattening Router Bit with 1-3/8" Cutting Diameter, 2+2 Flutes Insert Carbide Wood Planer Router Bits, Planing Bit for Woodworking

I had a customer that wanted a 11’-6” live edge oak office table, I was able to find a 20’ X 8’ slab of 127 year old oak, dried in a warehouse for 5 years so it was rough and very uneven. I am making the entire desk out of this one piece and have been milling it myself, I have used this bit the entire project so far and it is still cutting perfectly flat and not one burn yet and I still have yet to rotate the knives. This bit is absolutely worth the money!!

this thing works better than I thought it was going to. Had a 5 foot wide red Oak cookie that it cleaned down beautifully. 1st time I did this and it cut like butter. Skeptical at 1st because it was my 1st time but no problem. I would buy this again good value.

The large 3' cutter makes routing a large slab a lot quicker, it is best to keep the depth of cuts thinner because you are cutting a lot more area at each pass. Like most large cutters it dulls quicker than smaller cutters and has to be cleaned more than small cutters. Great way to speed up processing and does the job well. Minimal sanding to remove cut lines when co0mplete.

Oh how sweet this tool is to use. Cuts a wide area reliably and smoothly. Minimizes cleanup. I’ve been working on a live edge slab table top. I tried using planes and sander’s to get a flat surface and wound up with the surface equivalent to the ocean. This tool has completely changed my approach. Thanks technology for your contribution to bolster my skills! BTW, thanks to Amazon for providing this seller the opportunity to introduce me to their products.

After having ordered a $16 BINSTAK CNC 1" x 1/4" shank flattening bit some time ago, I finally got to using it yesterday on a very warped 24x24 end-grain cutting board. It was a struggle, even with very light 1/64" passes with very slow feed rate. It was literally tearing out the wood grain - in the field - not just at the edges, which told me it was not sharp enough. So I decided not to ruin a very expensive cutting board, and ordered an awesome upgrade flattening bit from Amazon (THIS ONE!), which arrived this morning. What an amazing difference!!! This thing glided right thru that end grain like butter! The upgrade was worth every penny, and will likely serve me for life, with replaceable cutter inserts. Don't go cheap! Get a good quality bit!!!

This bit works great.had a piece of walnut that had been sitting out in the weather for a while. Had to make 3 or 4 passes to get it flattened. The bit did a great job. Would recommend this bit very highly.

I will be honest, this was my first wood cutting bits with inserts. I thought it would be more economical as the Chinese surfacing bits with brazed carbide cutting tips didn't last long when cutting hard woods but now I am not so sure. I thought I'd take light cuts (.25 mm) to get the feel of the new bit but the tool chattered and gouged the workpiece. I thought maybe I needed to take deeper cuts so I tried taking a 1 mm cut on a piece of dark cherry. Not but a few minutes into the cut on my 3018 CNC router the tool chattered so bad it knocked my dust boot off, shattering it and sending pieces sailing across the room.Since losing my dust boot I have not used my router or this bit so I can't say much other than I wished I'd purchased a half dozen 1 inch surfacing bits from China instead of this bit with interchangeable inserts. Bad thing was I bought a box of inserts when I bought the bit.If I happen to find out I was not using his bit correctly in will update this review. As a retired machinist I am very familiar with metal cutters with replaceable inserts and thought I wouldn't have any problems. I ran the tool at high rpm and a low feed rate, maybe someone can tell me if I am doing something wrong?After upgrading to an 800w spindle motor the but no longer chatters and leaves a good surface finish so I raised my review from 3 to 5 stars.

I left an earlier 1 star review because my router bit (1/2" x 2" spoilboard surfacing bit with carbide inserts) arrived missing one of its three carbide inserts.The missing insert was shipped immediately (with a few extras for my trouble). I was contacted several times to be updated during the process. Very good communication, it felt like personal service. Thank for that!The tool itself exceeded my hopes. The geometry looks correct and the finish is high quality. It's a large, heavy bit, but it spun up to speed without any vibration whatsoever. (My router indicated 13,000 rpm. I was advised that the bit's maximum is 16,000. I'm using the router on a sled-type fixture- I'd be hesitant to use any bit this large in a hand-held application.)The resulting finish was beautiful. I often push my bits past their prime because of the cost, but the replacement inserts for this bit are cheap enough to never have to live with a dull cutter ever again.To sum up- Very fast shipping, wonderful customer support and an excellent product.