Amana Tool - 55229 Carbide Tipped 82° Countersink with Adjustable Depth Stop & No-

Really great product when you are doing a repetitive set of countersinks and want to make sure everything looks consistent and professional. Great for adding plugs.

I used this on Hardy board and after 20 pieces drill was dull but the countersink was fine. I do have a diamond grinding wheel and sharpened the drill. I put the correct angles on the tip based on the materials I was drilling and it seemed to last an additional 30 pieces. I believe the carbide is a lower standard quality. If I was using this on wood only, I would be very happy with the use and outcome!

Pros: Wiiorks well as a depth stop. Cuts fairly clean. Cons: The stop collar will mar your work and particularly for softer woods and particularly if youre not drilling perfectly perpendicular to your surface. While some have complained about the bit longevity I havent used it long enough to assess that. My biggest gripe with the bit is its too short. In my opinion youll need a longer bit for screws over 1.25 to 1.5. You could hold the collar to eliminate the initial spin that can cause marring but that concerns me somewhat for finger safety should the collar suddenly seize.

Ive only used this for a few holes, but thought I would share my initial opinion. Ive used several countersinks on wood screws and Im primarily concerned with how smooth the outer edge of the hole is and how repeatable the countersink depth is. I have tried the Snappy, the cheap Ryobi, and a few others. The best I have found until now are sold by Lee Valley and made by an Israeli company. With this product I obtained clean holes with no edge breakout on pine plywood. I looked at the package and it says made in Israel. I suppose Amana has a deal with the same company. I did not test counterboring as you would for a plug covering the screw. No scratching of the surface as the collar does not rotate. If you adjust the depth stop, you have a perfect hole that just fits the screw head every time. The only downside to this product is that the collar completely blocks your view of the progress of the countersink. You are drilling blind at this stage unless you can move your head down to see under the workpiece. Just takes some getting used to. The depth is controlled by the collar, so you dont really need to see whats happening. You do need to really slow down the drill as the countersink portion is engaged. In general, countersinks like to cut slow if you want a smooth edge. I try for about 200 RPM for a countersink of this size. If you dont want to spend the money on this, a pretty good hole can be obtained with the Ryobi set AFTER you hone both sides of all the cutting edges. An Ez-lap or similar DMT tool or small sharpening card is good for that. (and they are diamond grit, so they will also sharpen this countersink if you drill enough holes to dull it) This countersink product series includes several drill diameters. This one will clearance drill for the threads on a #8 modern wood or deck screw. Consider the screws you are going to use and whether they have a relieved shank that will extend through the top workpiece. I will probably buy a 1/8 one for that case. Also, I learned that wood screws, at least the GRK brand, are 90 degree heads. Sheet metal screws and machine screws to imperial (U.S.) standards are 82 degrees. Machine screws for very thin parts (aircraft or electronics sheet metal) are sometimes 100 degrees. Amana offers 82 and 90 degree versions. If you are using a drill press, very good results in wood can be obtained with a machinists zero-flute Weldon countersink set. They are HSS and must be sharpened occasionally with a small stone in a moto-tool or die grinder. Those will not counterbore for a plug, only countersink. Machinery suppliers also sell one-flute countersinks that will do pretty good, and solid carbide countersinks. Hand drilling with the common six-flute hardware-store countersinks either leads to burning through the wood since they are not sharp, or more commonly wobbling in the hole and chattering. If youve read this far, you are now a countersink expert... Edit: If your collar is turning after contact, try light machine oil under the retaining ring. Made a difference for me.

These seem to be all the rage, and the concept is fantastic. However, Ive bent two or 3 bits, even in the drill press. Im not sure what the issue is, as the bits seem to be bending near where the set screw retains the bit. Kind of disappointing, especially for the expensive price point

Not sure how I went all these years without this tool, it is absolutely amazing and for cabinet building to deck/porch building is a first-class addition to my woodworking arsenal of tools.

I saw this product on a YouTube video did some research and ordered it. This thing is awesome and far out performs the countless other counter sink bits I own. Very well made and I love the ability to easliy adjust the depth of the countersink without having to second guess.

If you need to drill countersinks, get this, it is fantastic. Consistent results, and the depth stop is on a bearing so it doesnt mar the surface.

I have several countersink bits and this is, by far, the best one I have. A little pricey but you get what you pay for.

I have wanted this Amana Tool 55227 countersink bit for a long time. I started using it right after it was delivered. This is exactly what I expected. My first few holes were perfect. I know I am going to enjoy adding this to my toolbox. If you need a countersink bit this is the one.