Sealey SMS01 Drill Bit Sharpener Grinding Attachment

Product Information

The Darex M3 doesn't include point splitting as their more expensive M5 does so when needed I split point drills with the 4/6 facet sharpener's point splitter. I no longer used the Darex after completing the 4/6 facet powered sharpener so I sold it in January 2012. Ensure that you wear gloves when you’re sharpening your bits. This will help you avoid any injuries to your fingers, especially from small splinters of shaved-off metal. D" bits can be sharpened or even produced in the fixture. Generally, it takes a while to remove much metal by hand with a stone so where possible rough the shape on a bench sander or grinder first then finish to the desired angles in the HoneDrill.

This model is very similar to the Drill Doctor DD750X. The main differences are that it is only slightly more restrictive on the size drill bits that it can accommodate, and it has two set angles rather than adjustable angles. However, most drill bits you’re likely to come across will be compatible with this sharpener, so it’s not much of an inconvenience unless you work with non-standard bits. Another aspect to consider is what type of drill bit the tool can file. Some drill bit sharpeners can handle all types of drill bits. This includes carbide bits, masonry bits, titanium bits, and cobalt drill bits. Have a look at what your most-used bits are made from, and make sure you select the best sharpener for your needs. Why we like it: This sharpener is specialized for getting exactly the right angle on any drill bit you might own, no matter the size, material, or purpose. Sharpening drill bits on a grinder requires a bit of technical knowledge. While Drill Doctors are a lot simpler and come with operating instructions, they work a little like a fancy pencil sharpener. Here’s how to sharpen your drill bits on a grinder. Safety First Drill Doctor DD500X isn't cheap but we can definitely get behind the not-so-modest price considering what the model offers in return. This little instrument is able to sharpen high-speed steel, masonry, carbide, and tin-coated bits. It has no issues with standard twist bits ranging from 3/32-inch to 1/2-inch (3 - 13 mm). It is able to create split points as well as the next machine.An implementation of Oakes design for small drills (includes plans), no inclination to the axis (fixed axis offset since diameter range is small). The model's pretty versatile too. You'll be able to work with HSS titanium, cobalt, and carbon steel bits. In fact, you'll be able to work with just about any drill bit ranging from 3 to 13 millimetres (3/32 to 1/2 inches).

The 11/32" drill shown at right has small SPA's added making it 6 facet. These extra facets cause the drill to have a stronger self centering action plus the shearing action often produces a better finish in the hole. The sharp outer point on the cutting lip, a common failure point (pun), is eliminated so the drill remains sharp longer. It requires only one additional hole in the tilting table to produce SPA's, where the size of the facet is set by eye; SPA facet size isn't critical so simplicity won out. The brass piece is 5/16" long. It is about 5 thou under 3/8" for 3/32" and the remainder is 5/16". The inside is drilled 1/4" and tapered using the reamer previously used to taper the pin vise, the larger diameter toward the large diameter of the brass piece. As with the small collets, brass on steel has low friction and does not rotate the collet as the nut is tightened.Why we like it: This sharpener can handle most drill bits that you are likely to use in a professional setting without the professional price tag.

This is precisely why you need a drill bit sharpener. These tools take the guesswork out of sharpening your drill bits, giving them a new lease of life. Having sharp drill bits will save you both time and money in the long run. I scribed a fiducial mark across the face of the pin vise between the chamfered corners. This is adequate for aligning by eye the flutes of all bits in the covered range. An optical aid, similar to that built for the Four Facet Sharpener, proved unnecessary so I have an extra Lucite lens awaiting some future project -- a peril of mass production to avoid extra setups.

Drill point splitting is possible with a modest addition to this 4/6 facet sharpener. Based on the Mazoff article I built a version to produce a "modified split point", similar to DIN 1412 C. My prototype point splitter provides reasonable results considering my wheel's corner is slightly rounded from use. The modified split is angled more than a regular split point and its edge is undercut to provide positive rake. The 6 facet split point drill pictured is 21/64" with a 0.070 web where I left a 0.018 point width (point width is easily adjusted). Per Mazoff the point could be as small as 0.010 and remain strong enough. Other conical sharpeners were produced, e.g. the Atlas and Kalamazoo units, but these are no longer in production. I haven't seen the Atlas or Kalamazoo units but the caliper for axis offset used in the Potts isn't apparent so they are likely a different simplification of the Van Royen concept. AFAIK the Potts and Duplex incarnations are the only ones that implement the complete Van Royen concept.