Roman Carbide DC1860 Carbide Forstner Bit, 1-1/2-Inch
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In my Wood Magazine Drill Press Speed Chart, it says that if it's a 3/4 to 1" forstner bit, the recommended speed is 1500 rpm for softwood or 500 rpm for hardwoods, like WoodMagazine.com is where you can download your own set of charts. The site is open to anyone, regardless of membership status.
Using the bit I have (14mm), I drove it smoothly with a Harbor Freight benchtop drill press, which has very little torque, but turns fast. *br>I was drilling holes in a piece of oak about 3 inches in diameter, and had great Basically, carbide is extremely aggressive in wood and the faster you turn it, the smoother the cut will be (at 1600 rpm for your diameter). I don't think I'd try drilling it with a hand drill as it's a fairly large hole. The hardest thing I can think of is carbide, but it's extremely fragile. I think 1800rpm is the fastest I could turn a bit of that size. You may also need to adjust the drilling speed in relation to the hardness of the wood. The more difficult the wood, the slower the drill bit will run.
We recommend 430 revs per minute. It started off with a speed that was way too high, which caused a lot of chatter and a The poplar I was using took an excellent cut when I slowed down the drill press to 430 RPM.
The Forstner Bits I use are for machining hard wood into cups. The first bit I use is a one inch bit, and then I move up to a two or three inch My hole ends up being approximately 6 inches deep in the wood. Getting the job done should not be a problem if you are drilling into soft pine/fir.
Selected User Reviews For Roman Carbide DC1860 Carbide Forstner Bit, 1-1/2-Inch
Like a brad point drill bit, it does not have a smooth edge. In addition to not having the shape of a standard Fostner bit, it does not cut like one either. I have encountered 27 Fostner bits in my 61 years of carving wood and it is the only one I have ever used. It should not be advertised as a "Fostner Bit. " The edges of the bottom to the hole are not rounded off like they are with a genuine Fostner bit. There is no doubt that other reviewers have discussed how this drill bit cuts a very crappy hole, not smooth at all like many of the other brad point drill bits I have used in the past Many old ones are still in use today. I think it is almost consumer fraud to refer to this as a "Fostner Bit".
A Forstner bit of this quality is very precise. Hard maple drilled very well with my test drilling. In the picture, you can see the hole is perfectly drilled, and it also cuts very cleanly. " is to the 00"'s (means it is accurate to the 1000's A drill press with enough horsepower and torque is required for driving this bit correctly at a speed of less than 500rpm, which requires a strong construct. The press I use is a Powermatic PM2800b, and it runs very smoothly, but I could tell from the motor sound that it is requiring a lot of horsepower (torque). Thus, low horsepower drill presses may be incapable of driving this drill with enough power. It is a known fact that carbide tipped bits run cooler than HSS bits, which is why they can handle more Other sizes of Roman Carbide Forstner bits are still cutting like they did the first time, and I haven't needed to resharpen them in years. During drilling very hard wood, it is nice to be able to use less push-down force, since Roman Carbide could have sharpened this bit a little bit more. There is no change in the quality of this bit it simply reduces the force required to push it into hardwood, which can be easily improved with a few strokes of a small diamond tool.
I needed approximately 64 holes ranging from 5/8" to almost 3" in depth. In order to complete the project, I needed 32 holes between 5/8" and 1 1/4" in diameter. The surface isn't scorched nor torn, and I don't have any chipping, splitting, or other problems. Despite the rough edges of the cuts, they all look great and were easy to sand down to #320 grit sandpaper (600 after varnishing). I found this bit to be a godsend when sanding purpleheart because when it overheats and burns (in case you haven't dealt with it before), it can be EXTREMELY tedious to remove As a matter of fact, I am planning on purchasing a set pretty soon because this bit was so good. A great product that I would buy again if I were to buy As well as recommending it to my family and friends Currently, I am doing so as well. There is another positive aspect to this product - its price. My experience with this carbide forstner bit is that it is the least expensive of its size that I have seen, and I have not encountered any problems.
Earlier, I tried a different bit which didn't work. It is working with this one. Even at the slower speed of my drill press, it's not very powerful. My current project is removing hardwood from my house. Although the progress is slow, considering the amount of wood it is cutting through, it is quite accomplished. As opposed to a smaller drill bit that tears through stuff, this takes a whole new level of patience. There is less friction on the outside because it has only 2 teeth instead of a bunch of them. Despite my efforts, the drill heats up quickly, so I have to drill a bit and wait a little while. This again calls for a great deal of patience.
There is an additional runout of 009". What you expect is up to you. In addition to being generous and cutting well, the carbide is also stylish. The drill bit was for drilling holes for exact location of pipe bearings, but I needed it for drilling. In this bit, there is no addition of The runout was also causing a large amount of runout to the system, so my application would simply not function properly. In case you don't mind an extra 9 thou of runout, then these cutters are priced well and can cut pvc, HDPE, and UHMWP with a well-finished finish if you pay attention to the feeds and speeds.
One of the hardest woods I have to drill 150 holes in is ipe, for a project I am working on. One of my woodworking friends who is experienced suggested I get the Freud carbide forstner bit after I tested various bits. After getting one for $40, I completed 60 holes before the drill became too dull for further use. In all of the problems I had with the tool getting stuck in the holes, smoking in the holes, tear out, and speed, I assumed the process was the problem, instead of Getting back on AZ a couple of days ago As that bit wasn't available until August, I settled for two Roman bits at half price. These Roman bits cut twice as fast, did not get stuck on any of the holes, were easier to remove, did not smoke, and completed the job. I just hit the table with the drill and the bit was only "an inch or so" above the Freud at the start, but to be fair because it is a bit longer, I could have easily drilled through the table and hit it.
A 27 hole hole saw bit was used to drill 27 holes in 2x4 pine boards I ordered. Initially, the chip bit went well, and there were lots of chips flying around. My original holes using the drill press were not rushed, as I allowed the bit to do some work and raised it back up to do it again after it had done some work. Then each hole will be repeated multiple times. I wasn't sure, as I got to the end, whether I would be able to get the bit through the last three The progress was fairly steady at first, but it certainly slowed down over time. Compared with the other side of the bit, it seems that one is fairly dull. I am not sure that I will get my money's worth from the bit for its price. Yes, I may be able to sharpen the bit, but I would expect that the bit would last longer than 27 holes in two eight-foot pine planks. I'm not sure whether I will order from you.
I can honestly say that this is the worst bit I have ever bought. A lot of people do not have this size, so I had to get it myself. Roman Carbide has never been a major consideration in my purchases in the past, and I will not again buy anything from them. Initially, the cutters were not aligned properly and the bit did not drill an oblong hole because of the chattering. It chattered and drilled a round, but oversized hole. It was replaced by another one that was not much better. Do yourself a favor and look somewhere else if this is the size you need.
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