Drill Doctor DD500X Twist Drill Bit Sharpener - 3/32" to 1/2" - Electric Sharpener - High Speed & Portable - For Steel, Masonry, Carbide & Tin-Coated Drill Bits - Adjustable 118° or 135° Angle

If you're looking to be able to ram your bit through the grinding wheel as fast as you can, don't get this. If you're more in tune with the current universe, read on. I've bought a couple of these, though not because the first one wore out! This should be the last drill bit sharpener you buy IF you take care of it and actually read the instructions. Very inexpensive considering no more drill bit purchases (unless you just break them). It IS often possible to sharpen a broken bit back into use if there is enough of the bit left. I have used this sharpener to do that several times. Use this on my high speed steel as well as Cobalt bits that have a standard shank. Always take any burrs off of the bit shank when sharpening. Is important to not rush or overload, then all is fine. Gives great results when used correctly. Doesn't need an "install" schmamazon getting its nose out of joint again. Plenty durable when not pushed too hard. Easy to get new stones and parts for. Good documentation. Great value for the money. The size is as stated again, schmamazon, wtf? Accuracy, well, I do not have the lab to be able to measure this but I CAN say the sharpened bits DO cut very much cleaner and faster! So empirically this works well! Never sharpen a bit so fast that it turns blue, or it is ruined. Never drill until it is blue either for the same reason. Never use the "hammer" mode on your drill using steel or cobalt drill bits or you will ruin them and possibly injure yourself. Use ONLY carbide tipped bits designed for hammer drilling with this function. This sharpener has a diamond wheel so it CAN sharpen carbide tipped bits!

Works great. Just sharpened 75 drill bits and what a difference a sharp drill bit makes. Very easy to use. Well worth the money invested. Think I just paid for it sharpening these bits.

First off, this machine is quite good.it will sharpen dull bits as good as new.the actual sharpening process is quite easy and quick.the instructions to get there are a little vague.if your grinding a 118° angle the printed instructions doesn't tell you what notch to put the chuck in to get the desired relief angle.you have to keep resetting the bit and selecting the next notch and regrinding to get the desired relief angle.for the 135°setting the instructions do tell you the notch to select. And the port to grind the split point is straight forward.i used that port on a 3/ 8th's bit it dressed the point up nicely but it didn't grind the whole flute.( Probably the bit stick- out from the chuck is the reason). Overall I'm well pleased with the machine.it eleminates the errors and guess work that come with free hand sharpening.the vagueness of the printed instructions is the reason for 4 stars.it does an excellent job and in my opinion,worth the cost of the purchase price.a d with a three year no product registration hassle free warranty the cost is reasonable. Once you get the process to get the bit set to grind down pat your in business.i recommend this product to anyone who's not looking to keep on buying bits to replace the dull ones.

This is my second Drill Doctor. They are fantastic sharpeners. The first one was a DD 250. It is still in use after 25 years. I have sharpened maybe 300 or more drill bits with it. It still has the original stone. I received my new DD 500 yesterday. It is basically the same machine but, upgraded, and can sharpen masonry, and split point bits. Sharpened about 20 steel bits in about 20 minutes or so. Also, tried sharpening masonry bits. Takes a little getting used to but, after a couple of tries it worked great. On the masonry bits I would recommend starting with a bit about 1/4" or so until you get the hang of it before you try any smaller ones. They are a little harder to sharpen. I sharpened bits down to 1/8". I would recommend this sharpener to anyone looking for drill bit sharpener. They are very well-built and easy to use machines. Just follow the directions, and you will do fine.

A VERY quality piece of machinery. Great instructions. Easy to set up. I sharpened every bit that showed signs of use in my shop! I highly recommend it.

This is my 3rd Drill Doctor, the first one I sold on a garage sale because I needed money, 2nd was pretty much wore out before I bought it from a garage sale. This new one is my favorite the 500x and I opted to buy a secone chuck that would go to 3/4 it was cheaper to do it this way that buy a 750x. I work in plastics and have to sharpen my bits due to drilling sometimes close to 1k holes in a day. With that in mind plasitics are the worst to set up for, they require an anle of about 118 degrees, with a split point and a pretty severe angle from face to heel. We drill as large as 1/2" not pilot hole so bits need to start quick and cut rapidly otherwise they just clog up with plastic. The 118 most closely simulates the best working drill bits we use. It does however take a bit of studying and the use of a black sharpee marker to get it set up and figure out how to get it to produce the correct angles. Coat the tip with sharpee then setup your bit at zero. If you look at the alignment port there are several slots for the chuck to go in, the one in the middle marked 118 is the 0 advance or retard of the bit, the port is marked + on the left and - on the right. As I said coat the cutting end with sharpee ans make about 1 to 2 full revolutions then check to see if they cut looks right. if the cutting edge is getting rolled over or the back angle is too flat, insert the chuch turned more to the left + side this will cut deeper to the heel and stop the roll over. If you have problems read the instructions they are not too bad and experiment with clocking your bit timing in the chuck. If you desire to split point your bit after using a clocked setting you will need to reset you bit in the chuck at the zero 118 degree position before or the split point will mess up your nicely sharpened edges. Takes a bit of playing to figure out how to make it work but all in all when you get it sorted it works well and sharpens well.

I had a Drill Doctor 350 which was ok but it could only sharpen an angle of 118. I drill a lot of metal and 135 is a better angle for this material. I upgraded to the 500 and WOW am I ever impressed. The 500 can sharpen both angles and do it well. There’s not big learning curve either. There’s a video on using it as well as a pretty good manual included. I honestly don’t think I’ll ever need to any new bits for quite some time.

Handig en snel

取説はインターネットから見て使用しています。 やや分かりにくいところはありましたが 何とか使えています。 一切鉄板が切れなかったドリルが見違えるように切れるようになります。

Not that much good as expected

Es una de las mejores compras que hecho en Amazon, en verdad es un buen producto, los materiales se sienten bien, es fácil de usar y el disco de afilado parece que no necesitará ser remplazado pronto, afilé unas 50 brocas y no muestra ni siquiera desgaste, 1000% recomendado.