Drill Bits Sharpener, 3-13mm Drill Bits Grinder Sharpener, Lip Relief Angle & 95°-135° Point Angle Adjustable Drill Bit Re-Sharpener, Portable Sharpening Machine with 11 Collets, CBN & SDC Wheel

I have purchased the MR-13B model. It is cheaper on Amazon than model A and it is better in my opinion. There are several YouTube videos, describing both models in detail. Somehow you led to believe that model A splits the point and model B just thins the web. This is not true. Model B in my opinion is an improvement over model A. It allows you to achieve a true split point and has several ways of doing it. I am not going to write about every detail, but will concentrate on staff, which is not well described and is important in my opinion. This little machine is well engineered and constructed. It weighs 17.7 lb with collets, chuck and grinding wheel. There is no plastic anywhere except some electrical parts. The power supply is 120 VAC, 60 Hz. The cable can be separated from the unit. Electric part is very simple - there are a power receptacle, switch, rectifier bridge and a 110 VDC motor. There is no other electronics in the unit, so it has to be reliable. All parts are mounted on a 7 mm thick steel plate. They are steel (no aluminum here), machined and ground where necessary. That is how you achieve the accuracy needed for drill sharpening. For sharpening you have to setup each drill in the setup station at the left side of the machine. You use a chuck and a collet of the appropriate size. The collets are standard ER20 for sizes above 5 mm. For smaller sizes the collets are modified to include an extended nose and relieved bore. Drills smaller than 4 mm are very difficult to setup properly in this station and I would recommend to do a visual setup or just grind them by hand. The chuck has 2 bearings to reduce the collet clamping torque Once your drill is setup in the chuck you move it to a sharpening station, where you sharpen both lips by rotating the chuck back and force. This station has a bearing as well for easy rotation. If you want to split the point after sharpening, move your chuck to the top station and again rotate the chuck left and right. This operation is adjustable for the depth and width of the cut. The produced split point looks somewhat different from factory drills, but works the same way. The difference is because this machine uses just one wheel for sharpening and point splitting. The finished drill has 4 distinct cutting edges, just like the factory split points. This machine comes with CBN and diamond wheels, model A includes only CBN wheel The wheel is steel with plated layer of CBN or diamond grit. On the attached pictures I show the diamond wheel. It is 3" in diameter, 10 mm wide and has approximately 1/2" bore. The wheel is clamped to the adapter, which is attached to the motor shaft by 3 set screws. I have only tried the CBN wheel for HSS drills. It cuts very aggressively, but leaves an acceptable finish for bigger drills. For small drills you better find a different way of sharpening. Overall my level of satisfaction with this machine is very high. I am getting good drill grinds and nice split points. But don't fool yourself into thinking that it will do the grinding for you. You need to know what a good grind looks like and adjust the machine accordingly.

If you are considering this, I would suggest reading the review, and then just buy it. It is a great machine, and very easy to use once you get some experience with it. This Vevor Drill Sharpener, made by MRCM, compares very favorably with machines costing ten and 20 times the price. I paid full price for the sharpener. Pros: It is very precise and accurate, and able to grind many different points on bits, including accurate split points (aka crankshaft grind) The components are all well machined and heavy duty. It is solidly built. (Which enables accurate and precise grinding) The standard grinding wheel is cubic boron nitride, CBN, which is an extremely hard abrasive, and, if you take your time, it is easy to get a surface finish that rivals new bits. MRCM makes a broad range of professional sharpening tools, and I think that the quality of the engineering in this drill sharpener shows, and makes it easy to use. Cons: The manual is limited. (E.g. the knob to adjust the split point center, and the Allen set screw to hold it were not documented in the manual that I have, but they do work, and enable you to adjust the grind axis to have precisely ground split points bits.) I recommend watching a video or two on YouTube (hint: look for videos of MRCM drill sharpeners). If you are new to drill sharpening, I also recommend any of the Cleveland Twist Drill pamphlets available various places, or the book that the pamphlets came from. I think that drill sharpening is not perhaps rocket science, but like any tool sharpening, does require attention to detail by the user. The holders for the bits are industry standard ER20 collets. You can also buy ER20 collets in SAE/Imperial sizes. It doesn't matter much for larger bits, but may be helpful for smaller bits. Replacement grinding wheels both CBN and diamond are available if you look for them, as are replacement chucks. MRCM is also known as Zhejiang Meiri Intelligent Machinery Company.

I highly recommend the Vevor drill bit sharpener! It's easy to use and puts a professional sharpen on your drill bits up to size 13mm (approximately 1/2 inch). I have used it to sharpen my bits from 1/8 inch up to 1/2 inch. I have the Drill Doctor 750X and have never been that happy with it. I do not see why the DD 750x gets so good of reviews. I find that it in consistent at best and is cheap plastic. The Vevor is made out of metal and is of excellent quality. I have a degree in Metals Technology and have worked many years being a machinist, although that was many years ago. I still work with all types of metal and do some woodworking. The Vevor will be an excellent addition to your workshop and is well worth the money. I wish I would have found it a long time ago. My only regret with the Vevor is that it doesn't sharpen larger than 1/2-inch bit. Buy it, you won't regret it!

If you get frustrated because of dull drill bits then this machine is the ultimate machine to accurately sharpen drill bits. It comes with metric collets which can be used with American fractional, numbered and letter drill bits. There are also fractional collets available, ER20 Spring Collet Set 1/16-1/2 Inch from other vendors. I highly recommend this VEVOR machine. The instructions are not the best but there are excellent YouTube videos available. You can sharpen and split the tip on a drill bit in under 90 seconds. The drill angle can be set to a number of angles for specific needs. It is well worth the money. Treat yourself…..I did!!

I used this sharpener once to learn how to use it.. then the 2nd time, I actually did a pretty good job and sharpened a drill bit. It was sharp sharp! Worked great. The 3rd time I turned it on, or tried to turn it on, it had absolutely NO power. Nothing. Dead as a nail. I returned it at their cost, my money was refunded.

3 Stars because of incorrect product advertising / description: The product information states: "It features 11 elastic collets - 3,4,5,6,7,8,9,10,11,12,13, suitable for ф3-ф13 diameter of drill bits." This is INCORRECT. The MR-13B shown in the product images and the one I received did NOT include 3,4 or 5mm collets. It did include sizes 6-13mm. Just know you'll be unable to sharpen the smaller sizes until you obtain the collets NOT INCLUDED in the package. The sharpener works great.

The Vevor 13B is one of those rare off-shore products that really works, and works well. Right out of the box I was able to take a cheap drill bit I had on hand, sharpen it and put on a split point (technically thinned the webbing). The sharpened bit easily drilled through some 3/16” plate steel with little effort. The Vevor is sturdy and well made, and the collet has close tolerances so it fits snugly in the sizing and grinding openings. I took off a star for the almost complete lack of included instructions and the horrible (nonexistent) support on the Vevor website. I asked a fairly simple question, and after 4 days of AI-generated blather I turned to Youtube where I found several excellent videos describing the differences between the 13A and 13B, as well as tutorials on how to use the machine. The Vevor works so well that it actually takes longer to watch the videos than to sharpen the bits yourself. But watch the videos, they make using the Vevor a snap. Overall the Vevor 13B is excellent addition to my shop. I hate dulling a bit on a weekend night and having to spend 30’ driving to buy a new bit, or waiting until the next day if the stores are closed. This takes 2’ and I’ve got a new bit ready to go. The obvious comparison is the Drill Doctor. I have a Drill Doctor, but it is a toy compared to the 13B, and costs almost as much. No comparison, the Vevor consistently produces an excellent finish and a fast cutting bit. The Drill Doctor takes longer and is not as reliable; in my hands about half the time I have to take a 3rd or 4th pass with the DR, and sometimes even that does not make a useful bit. With the reliabilty of the 13B bit, the DR will go on marketplace or the scrap heap.

After re-sharpening a couple of dozen 118- and 135-degree drill bits, I'm generally impressed with the results. Grinds are symetrical, bits cut evenly on both faces, holes have minimal "wobble". The included instructions are pretty useless -- you'll need watch a YT video to get up to speed. The collet collection covers 1/8 - 1/2" bits. Collets are ER-20 and ER-25 style. Dialing-in the bit-diameter (web-diameter) is pretty low-precision -- the alignment arrow is an inch away from the dial. My biggest complaint is safety-related: while grinding the point angle on the side port, the abrasive wheel is visible in the top port and it's pretty hard to find a position that's out of the "line-of-fire". Eye/face protection is a must, and the same goes for respirator masks. The collet storage is okay (unless you transport the sharpener 'cuz all the collets will fall out of their retainer holes) but there's no place to put the workholder, kind of a big oversight IMO. All that aside, the unit consistently delivers sharp, well-formed drill bits, which, if you'll excuse the pun, is the whole point.

Schärft Bohrer sehr präzise und ultrascharf an. Habe jetzt 50 Bohrer aller Größen durch. Mit ein wenig Übung geht alles zwischen 5-10mm in ca. 30s pro Bohrer. Die kleinen brauchen etwas länger, hauptsächlich, um vor dem schärfen die Schneide auszurichten. Das ist etwas Fummelarbeit. Dauert halt dann 10s länger pro Bohrer. Das Schärfen selbst ist dann sowieso Sekundensache. Da das Gerät so gut funktioniert, würde ich fast sagen: Leute, investiert in nur einen guten Satz HSS-Bohrer und schärft die regelmäßig mit diesem Gerät nach, dann hat man die ein Leben lang.

E una macchina Spettacolare! Avevo visto le mille recensioni online della macchina e le mie aspettative erano alte, e devo dire che cio nonostante sono rimasto stupito di come affila le punte!! Una punta nuova non taglia bene come dopo essere stata affilata con questa affilatrice. La nuova versione arancione e a mio avviso molto piu bella della versione gialla che si vede in tutti i video di youtube. Direi che sono entusiasta di questa macchina e non posso che consigliarla.

Det bästa köp för borrslip den kan jag rekomendera

muito satisfeito com o producto .

Endlich eine vernünftige Bohrer Schleifmaschine. Gute Verarbeitung, eine beleuchtete Lupe wäre noch ein tolles Zubehör