These high-grade blanks with through-tool cooling channels are used when manufacturing CrazyDrill Cool. Drill regrinding and recoating are possible from a drill size diameter of 1.4 mm (.055”) and increase the cost-effectiveness of this tool.

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Drill Hog is a brand name of “Canary Island Corporation”, incorporated in Nevada, registered in California and operating in California. The sole officer is Mr. Joseph John Russell, who uses the same address as above. I could not find a California fictitious business name registration for “Drill Hog” (and I am not clear that one is necessary). The business is a “manufacturers representative”, which means that Mr. Russell probably purchases these drills from the actual manufacturer for resale. There is some left-over web presence of what appear to be two previous businesses of Mr. Russell: Something called “tarpsdirect”, and toolprice.com which sold Harbor Freight style merchandise. Their web site appears in the Internet Archive. There is more information about Mr. Russell easily available, but not reproduced here out of courtesy.

CrazyDrill Cool can replace expensive deep-hole drilling (for example with gun drilling machine) up to a depth of 15 x d in the drill size diameter range of 0.75 mm to 6 mm (.030” - .236”, coated version in fractional inches available). Greater productivity is thus reached without having to invest in expensive manufacturing systems. Thanks to the high surface quality further finishing processes such as reaming are often not necessary..

It is generally known that machining tungsten carbide or grinding carbide blanks with through-tool spiral cooling channels represent a special challenge. Mikron Tool has specialized in grinding the carbide raw material in such a way that the tool is not weakened and remains stable despite the internal cooling channels.

Mail your broken drills there, with your name and your previously registered serial number, and they say they’ll mail replacements back. The drills are claimed to have a “Lifetime Warranty”, but of course with a small business one has no guarantee of what lifetime the company will have, during which it will fulfill warranty claims.

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Tool steel is not a homogeneous solid. It’s a matrix of hard carbides or nitrides in metal. Alloying with niobium promotes a fine grain of the carbide and nitride crystals and better case hardening, and promotes the toughness, strength, and formability of the steel.

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The special cutting geometry of CrazyDrill Cool affords optimal chip flow. The need to remove chips depends on the material to be machined and the drilling depth (see cutting data chart). A clearly defined drilling process allows a high degree of process reliability which combined with fast drilling speeds produce time-savings compared to conventional tooling.

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The small drill with through-tool cooling CrazyDrill Cool from Mikron Tool also resolves drilling problems in difficult-to-machine materials. The combined use of a pilot drill (solid carbide drill bits CrazyDrill Pilot or  CrazyDrill Crosspilot) and the small drill with through-tool cooling CrazyDrill Cool allows drilling depths of up to 15 x d (other standard lengths: 6 x d and 10 x d) and this in drill size diameter ranges of 0.75 mm to 6 mm (.030” - .236”, coated version in fractional inches available). A shaft-integrated power chamber (up to a drill diameter of 2.95 mm / .116”) allows a more efficient coolant supply directly to the drill tip results in higher drilling speeds and tool life. A double advantage! In addition, the drilling concept of the CrazyDrill Cool is an alternative to the long and costly deep-hole drilling methods using single-lip drills (gundrill).

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Their prices on eBay are cheaper. Amazon takes an 18% markup, is required to carefully charge sales tax, and often does their own fulfillment (processing the order and shipping). eBay vendors pay less of a markup, may avoid sales tax in some cases, and generally do their own fulfillment. So, always look for the same product from the same vendor on eBay before you buy.

There are a few videos online evaluating these bits making large, deep holes in stainless steel, and in the videos they handle that fine. Drill Hog claims that niobium is a specialty drill bit which only works well with certain metals (they don’t say which) and which they usually sell to locksmiths and gunsmiths.

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Locksmiths would use this sort of drill to drill the pins out of a hardened lock cylinder; a forced-entry method that, if done carefully, only damages the lock cylinder and some pins and springs rather than the entire lockset; allowing the locksmith to repair the lockset after entry. Gunsmiths also drill into hardened steel. I am making some antenna mounts out of 1/4 inch 304 stainless steel. I might also fabricate some space satellite parts for Open Research Institute. Perhaps I’ll find it makes more sense to stick with cobalt for those applications.

There were some questions online regarding who Drill Hog really was, because so far they don’t have an email or a phone number published. No phone is not unusual for someone’s “side hustle”, when they work another job all day, but I would have preferred to see an email. Drill Hog requires warranty registration at hogwarranty.com . Once you have registered, they service their warranty through this address, which is a box in a UPS store:

To be able to machine nonferrous metals as well as high-quality and difficult materials successfully with CrazyDrill Cool, the small drill is available with or without coating depending on need. For example, the uncoated variant of this through coolant drill is best suited for drilling alumimum.

Dec 23, 2011 — The "Engineers Black Book" is my favorite in shop source of tungsten carbide insert information for, identification, shapes, selection, ...

Two spiral cooling channels leading up to the drill tip supply the cutting edges with coolant even at lower pressure due to the power chamber in the shaft (up to a drill diameter of 2.95 mm / .116”). Oil volume that is three times greater flows through the shaft at the same pressure, allowing high drilling speeds and guarantees better tool life and more efficient chip removal.

CrazyDrill Cool is used everywhere where long drills are needed to create deep and accurate holes. The drilling concept from Mikron Tool is especially designed for deep holes and is based on a two-stage principle. Centering and pilot drilling is carried out in one step with two types of drill bits: CrazyDrill Pilot or CrazyDrill Crosspilot. CrazyDrill Cool then reaches the maximum drilling depth in one or more pecks (depending on material).  By means of fine-tuned tolerances the long drill is not only guided very well in a cylindrical bore but also produces a hole with the best quality. On inclined surfaces the combination with CrazyDrill Crosspilot works best allowing center drilling with an inclination angle of up to 60°.

I purchased a set of niobium steel drill bits from “Drill Hog” The price was good, and I was interested in whether they’d work better than cobalt for some applications. Cobalt drills are known to be hard, but quite brittle. I’d use either kind of bit only in a drill press, if at all possible, and only with cutting fluid. I would in general use less expensive high-speed steel drill bits in a hand drill.

Besides their own brand, Drill Hog has sold some Norseman drills. Norseman is a well-known source of high-quality drills. Drill Hog’s house brand drills look like copies of Norseman drills, with the same thin web (the metal between the two flutes) and similar details to the machining of the bit. They are marked “USA”. Mine came packaged in a black plastic canister which seems to be a knock-off of the one Norseman sells – a slightly different shape and different color.