Whiteside 6210 CNC Spoilboard Surfacing Router Bit, 1/4 Shank

Ive read stellar reviews and have used this bit for a handful of projects that were spread out over about a month. Facing my spoilboard, and a couple MDF & Birch wood projects. I tried 1 epoxy inlay project and the bit was actually ripping out epoxy along each pass. This bit worked great at first. Not anymore. The edges of the but are not quite sharp anymore. Theyre actually polished looking, which lens me to believe that the carbide grade isnt that great and/or the relief grind is shallow. First off, I know for a fact that the relief being angle on this bit is very shallow. In the machining industry, relief grind is generally @3 degrees. This does not appear to be the case. The cutting edges are polished. One usually only seen this when machining extremely abrasive materials such as glass filled composites, titanium, or nickel based alloys. I highly recommend paying the extra money for insert bits.

It came in quickly - It looks like it will do the job well - I havent used it yet, but its as described, and It should work very well.

Did a great job leveling my 24 X 49 particle board vacuum chuck spoil board. I used a spindle speed of 12,000 RPM, a feed rate of 80 inches per minute, a .010 depth of cut and a .4 step over on this 1 router bit to make a smooth surface thats free of ripple that might be caused by an out-of-tram spindle. It took a little over 30 minutes to level the spoil board and it made a lot of very fine dust. The CNC router is completely enclosed so this wasnt a problem, but if you use this without a full enclosure, youll have fine dust flying all over your shop and you dont want to breathe that fine dust.

Surfaced a solid hardwood cutting board with this that was made of Walnut, Ambrosia Maple, and Purpleheart wood and it went to work without a single issue. I will be ordering more of this one when I need to replace it for sure and wont think twice about it!

I will admit, i just got this bit and Ive only flattened one walnut slab.. that being said, cuts like butter. I would be extremely surprised to find a better flattening bit at this price range that can perform as well. Awesome product!! Would love to try the 6220 when i can.

Great product, used it on cnc machine , Great value for the money

Ive used this bit several times to flatting a few slabs. I wanted a slightly smaller cutter so I could use my palm router and not overload it. This bit works perfect and leaves a great finish on my slabs. It took 2 passes of sanding after to get a great finish.

If youre looking for a great router sled bit look no more you have found it....I kept putting off buying one for so long but will buy only Whiteside bits from here on.

Cuts good, gets a little hot but not too bad. It cuts epoxy well.

Used this to cut a table top from a elm tree block of wood. Cut this without any problems and the bit is still sharp.