Whiteside Router Bits UD2102 Up/Down Cut Spiral Bit with Solid Carbide Compression and 1/4-Inch Cutting Diameter

Boom! I use this Up/Down in my CNC all day long. It doesnt quit. This bit has become my main production tooling on 1/2 and 3/4 plywood. I have even crashed it several times- putting nasty strain on the bit, and it still holds true, and plows through Baltic Birch with no issues, tearout or ragged edges. Its a really nice cutter for the price. update: many hours of cut time on this, and it just wont quit. It just keeps plowing through plywood and plastic just fine.

Bought this to cut out holes in maple-faced 1/2 plywood. Cuts very clean on both sides. No clean up required. Works, not much else to say!

Used on my CNC. It cuts plywood well. If I use it to drill a quarter inch hole (straight up & down on the Z axis) it seems to cut a slightly oversize hole. Other 1/4 endmills are more typical of what I get using a standard drill bit in a drill press -- a tight fit for a 1/4 dowel.

I spend a lot of time using router bits. Normally I go with the most cost effective (cheap) I can get at the local box store. These Whiteside bits are no joke and well worth the extra $. I’ve used it multiple time and it has yet to snap or dull.

I have been extremely impressed with this bit. Purchased it to cut 1/4” grooves for drawer and box bottoms but have found several other uses for it. Love it so much I ordered the 1/2” astra coated version from bits and bits.

I use this bit for cutting numerous MDF parts on my benchtop CNC. I leave a clean edge on the top and a decent edge on the bottom. Definitely worth the money and I will be buying more as needed.

After struggling between up and down cut spiral bits, finishing issues, and bit sharpness. I found the one. This bit is a game changer.

Super bit! I used it to cut a round top for an antique plant stand. Worked perfectly. Clean top and bottom cut, no fraying, no burning, and required very minimal sanding to prepare for a final routed edge. I restore antiques for a hobby/passion. This is a must have. Dont know how I got along without it.

I have used compression and downcut bits from all of the big manufacturers as well as the no-name, budget bits. Some that are nearly double the price of this bit. But this one has given the cleanest cut on the face and back of the material I use. I have run two 3/4”, one 1/2”, and one 1/4” maple veneered 4’x8’ MDF sheets full of parts cut all the way through with the same bit and it’s still holding up just fine. You can barely notice any wear. I think I have found my new workhorse.

Great bit. Compression bits are the way to go if you really need to reduce or eliminate fraying and blowouts along the cut edges. I like Whiteside products anyway, but wasnt sure how this one would handle being subjected to plywood almost exclusively. It started out plenty sharp and made super clean cuts. It did finally wear down, but gave me a reasonable amount of use life. Fit my .25in router well. Plenty of shank for the chuck, while still having a long cutting surface. Helps reduce vibration and bit flexing. As with any bit, cut at the right depth and right speed and youll prolong the lifespan even more. Im buying another one, kinda says it all.