Razor Shark´s extensive range of diamond whetstone are designed and manufactured in the UK and are the product of over 30 years experience of supplying diamond abrasives to Rolls Royce, British Aerospace and other leading manufacturers. Backed by a 5 year lifetime guarantee, the diamond whetstones are up to 95% quicker than conventional sharpening methods and can be used on a wide range of tooling from router cutters, chisels, plane irons and saw blades to knife honing, scissors and garden tools. Basically pretty much any tool with an edge.
All of the Razor Shark Diamond Whetstones that we stock on this web site are double-sided whetstones that offer two grit sizes in just one stone, allowing coarse sharpening and finer finishing to be accomplished with just the simple turn of the whetstone.
All Razor Shark Double-Sided Diamond Whetstones are suitable for the sharpening of all HSS (Hardened and treated high carbon content steel used to make router cutters giving maximum sharpness. Suitable for non-abrasive materials.), and TCT (Cutting faces on tools normally brazed onto the tool body. Harder wearing than traditional WS or HSS tools. Ideal for man-made boards.) tooling.
If you look at the 'Vickers Hardness Scale' (Fig.1), you will see that Diamond, which is the hardest material, known to mankind, is given 10,000 on this scale. The nearest competitive abrasive material to diamond, Cubic Boron Nitride CBN), is around 4,000 on the Vickers Hardness Scale, which means that diamond is some 2.5 times harder than this material. Another abrasive is Aluminium Oxide (Al2O3), common used in Ceramic Sharpening Stones, is about 2,500 on the Vickers Hardness Scale, but even this extremely hard material is still 4 times softer than diamond. So you can see that diamonds are not just a girl’s best friend, they are the best buddy to anyone who wishes to sharpen steel or tungsten tools. Anyone who use the amazing Ceramic knives, will see DMT Diamond Whetstones as a real godsend, they will quickly and easily sharpen these super hard blades; diamond being 4 times harder that the Aluminium Oxide that makes them.
Razor Shark Diamond Whetstones are renowned for their remarkable sharpening speed. This sharpening speed is a function of the quality of the micronized super abrasive, Monocrystaline Diamond that they use in all of their products.
The drawing shown below (Fig.1), demonstrates the view of Monocrystaline Diamond Crystals vs. Polycrystalline Diamond Crystals. It becomes obvious that the Polycrystalline diamonds will begin to fracture at the weakest points, which are shown where the surface is segmented.
Polycrystalline diamond are made in such a way that the process causes the diamonds to have microscopic flaws and fracture lines that are very weak and will fragmented when used. Polycrystalline diamond sharpening compounds rapidly break and wear away.
Many competitors use Polycrystalline diamonds; these diamonds will easily breaks apart, sometimes within minutes of use, fragmenting into a paste that is instantly washed away by any lubricant that is used. Some competitor’s even claim that their stones are constructed from multiple layers of diamonds, however, this only indicates the poor quality diamonds that being used. After all using high quality Monocrystaline diamonds on surface that is designed to wear away revealing new diamonds underneath would be a waste of these quality diamonds, since they will only be washed away ... better to use the much cheaper poorer quality Polycrystalline diamonds and save money.
Monocrystaline diamonds (Element 6 Diamonds), on the other hand, are diamonds that are formed with a single crystalline structure. This pure unflawed diamond structure will not shatter and break down with use. Monocrystaline diamonds are very strong which will result in an exceptionally long life span. Monocrystaline diamond have the following properties:
Razor Shark Diamond Whetstones only use two principle grit sizes Fine & Coarse:
The Fine (F) Red - 25 Microns - 600 Grit/Mesh - is ideal for putting a razor sharp edge on a blade that is regularly maintained (i.e. for restoring any knife or tool that has just started to become slightly dull). This restoration, more often than not, is accomplished within just one or two strokes across the whetstone.
The Course (C) Blue - 45 Microns - 340 Grit/Mesh - is general used for rapidly honing and restoring dull edges on neglected tools, blade and general cutting tools such as joinery and High Speed Steel tooling, bringing them back to a sharp cutting edge again, also for re-shaping and rapid metal removal, fast action cutting, without worry of edge refinement.
Superior Monocrystaline Diamonds are bonded through an Electroless nickel plating process to a precision ground pre-plated nickel Carbon Steel (EN43A) base. The Electroless process ensures a more even spread of diamonds which produces unparalleled flatness. Razor Sharks diamond stones are the only diamond products, which are completely pre-plated in nickel first ensuring extra durability.
A Continuous Diamond Surface gives a much smoother finish and prevents snagging on smaller tooling, especially when compared to traditional polka dot diamond stones. This Diamond and nickel lift is also prevented by a continuous diamond finish that also gives 50% more diamond coverage per square inch and prevents diamond and nickel lift giving more effective anti-corrosion.
Precision Ground to perfection. Razor Shark Bench Stones are pre-ground to a tolerance of flatness of +/- 0.005mm, so you are guaranteed that these whetstones are suitable for the most precise of precision tools.
Initially your diamond stone will seem especially coarse and abrasive, however, it will smooth over time, settling into its correct diamond grit size. James Barry, a leading Razor Shark Diamond Whetstone specialist, suggest that you will not attain your maximum sharpening performance on these high quality stones for a couple of months; this is testimony to the level of hardness and quality of the Monocrystaline diamonds that are used in all Razor Shark Diamond Whetstones. Barry advocates that you use very gentle strokes, and that you need not exert extra pressure as you sharpen with your Razor Shark Diamond Whetstones – “Just let the diamonds do the work!”
Razor Shark Diamond Whetstones are precision made tools. When used with reasonable care, they will give many years of faithful service.
Although water can be used as a lubricant for Diamond Whetstones, Razor Shark do not recommended its use its use on Razor Shark Diamond Whetstones will affect the Razor Shark 5 Year Guarantee.
It is well known that water will to cause metals such as steel to rust, and since very fine metal particles of metal are abraded from tools as they are sharpened, this metal swarf will quickly begin to rust. If left on the whetstone's surface there is a very high probability that any diamond whetstone that is lubricated with water, or water based products, will begin to form rust. This rusting will, if it gets under the nickel / diamond sharpening surface, affect the bonding between the precision ground base plate and the nickel / diamond surface causing the two to separate. In other words water will rust the whetstone and the rust will cause the diamonds to fall off, thereby rendering the whetstone useless for sharpening your tools.
To get around this problem Razor Shark recommends that all diamond whetstones, even those made by its competitors, use a specialised Diamond Lapping Fluid as the preferred method of lubricating these products. Design solely for Diamond Abrasives, Razor Shark Diamond Lapping Fluid is petroleum based that effectively lifts the swarf created whilst sharpening away from the diamond surface, this effectively increases the life expectancy, reduces clogging and improves the diamond performance. Professionals who have previously used water on a variety of different make of Diamond sharpening stones have constantly complained of rusting problems caused by water - Razor Shark Lapping Fluid reduces threat of rusting by 95%.
When further cleaning is needed it is recommended that you use a Razor Shark Cleaning Block to remove any excess swarf, you will find that maintaining the whetstone in this manner increases sharpening speed - once cleaned the performance of the diamond stones unparalleled.
Razor Shark Diamond Whetstones are considered by professionals to be excellent value for money because of their durable construction, quality and reputation for providing years of uncompromising service. Unlike conventional oilstones, Japanese Water Stones, Arkansas stones and other ceramic sharpeners, Razor Shark Diamond Whetstones will not break, chip, crack, hollow or groove.
Enthusiasts worldwide prefer Razor Shark's award winning products to care for their edges. Just as essential as your pocketknife, Razor Shark Diamond Sharpeners are lightweight, easy to carry and durable. They withstand harsh environments and sharpen all kinds of knives, tools and edged equ
ipment that hunters, hikers, rock climbers, adventurers, campers and sportsman rely on to survive and enjoy the outdoors.
Razor Shark Diamond Sharpeners will quickly sharpen the toughest stainless steel kitchen cutlery while removing a minimum of material from the blade - unlike electric sharpeners. Manual sharpening with Razor Shark products is fast, easy and versatile. Whether you have a common chef's knife, a Japanese Sashimi knife or even a steep-angled meat cleaver, Razor Shark can do it all.
Traditional Butcher steels do not remove much metal because they are about as hard as the knife. Butcher steels only align the edge. Since they remove very little metal, they round the shoulders of the blade. This diminishes the life of the knife.
Each time you sharpen on a Diamond Steel, a very small amount of steel is removed keeping the edge of the knife thin and the angle maintained. Razor Shark Diamond Steel extends the life of knives, this alone can pay for the cost of the Razor Shark sharpener.
Many chefs and home cooks prefer to use a Diamond Whetstone to sharpen their favourite knife. A few light strokes are all that is needed. You can use a Whetstone to sharpen when you need to re-align an edge or just because you prefer to use a Whetstone. Having a Diamond Whetstone in the kitchen doesn't mean that you can't also use it to sharpen other edged tools that you may have in your home – scissors, woodworking tools, and more. It's a great value and a lot of sharpening potential from just one sharpener.
The Difference between Razor Shark and other makes.
A: The manufacturer of the ‘Polka-dot’ range of diamond whetstones has been around for many years, Razor Shark Diamond Whetstones are a progression from these much respected products. Razor Shark Diamond Whetstones are manufactured with a continuous diamond surface, which have the following major benefits over the ‘polka-dot’ system:
A: Basically all diamond whetstones fall into two construction categories Impregnated Diamond Whetstones and Electroplated Diamond Whetstones and two types of diamond quality Polycrystalline Diamonds and Monocrystaline Diamonds:
A: Razor Shark Bench Stones are pre-ground to a tolerance of flatness of +/-0.005mm.
A: If use on a Professionals basis (every day) the average life span will be approximately 8 – 10 years. It is a fact that all diamond products will wear in time, however there is a whole world of difference between a diamond wearing down through years of faithful service as is the case with Monocrystaline diamonds and diamonds that simply shatters and falls to pieces as soon as they are used as is the case with Polycrystalline diamonds.
A: Most of Razor Shark products are double sided, having a Fine grits on one side and a much Coarser grit on the other. This makes the choice really quite simple, so there is no need to purchase several different Whetstones. All you need to achieve sharpening perfection has been incorporated into just one product, a Coarse side that is good for re-shaping and backing off (flattening the backs) of your tools and a Fine side that I good for refining a cutting edge enabling you to achieve a shaving edge in just four or five strokes.
A: You would only need to purchase just 1 item from the Razor Shark range, since they are double sided (having a Coarse and a Fine grit side), whereas with DMT you will need to purchase up to five different grades which complicated matters. Two grades on the same stone is sufficient for all of your sharpening needs.
A: Yes, you need a lubricant to keep the surface clear of the build up of swarf that is abraded from the tool you are sharpening.
A: Water has become the lubricant of choice for most users of diamond whetstone, and as a lubricant it is freely available to all, certainly it is much better that using oils which are dirty and extremely messy to use. Using water as your choice of lubricant is great if you are out and about in the great outdoors for a couple of weeks or so, however it does have its drawbacks, it is well known that water and metal do not mix, since one will cause the other to rust. As I have already mentioned Razor Shark diamonds are electroplated to the surface of a precision ground steel plate using the metal Nickel, Nickel being a porous metal will hold and trap water, which will then begin to undermine the stability of the diamonds that are embedded within its structure and being porous it will also begin to cause supportive steel bedding plate to rust. Once this process begins to happen the rusting steel will flake thus causing the diamond/nickel electroplating to lose cohesion and fall off, which is not what you want to happen to high quality diamond whetstones. So, if you do need to use water as a lubricant it is strongly advised that you always dry off the stone thoroughly after each use and bear in mind that since Nickel is porous it will still hold onto the moisture that is absorbed into its surface, which significantly reduce the life of these whetstones. As an alternative to water and the issues it has with metal, we would always recommend that you use the Razor Shark Lapping Fluid. Razor Shark Lapping Fluid has been developed over thirty years in the engineering industry for the sole purpose of being used on diamond sharpening products. It will prevent the threat of rusting and is able to lift swarf away from the diamond surface, which increases efficiency by preventing the surface from clogging. It will seal the microscopic pores of the Nickel preventing atmospheric moisture from entering, which will considerably prolong the effectiveness and durability of the diamond whetstone.
A: Razor Shark Lapping Fluid like oil, is a petroleum based product, however unlike oil should Razor Shark Lapping Fluid be left on the surface of the diamond whetstone, for whatever reason, will eventually evaporate … oil will not. Oil, being somewhat sticky, will attract dust and other forms of debris, which will clog up the whetstone surface thus reduce abrasive efficiency and if a drying oil is used you may be required to use harsh chemicals to removed the resulting film; and if using water or water based products you will eventually have issues with rusting. Razor Shark Lapping Fluid will not cause any of these problems.
A: It is recommended that Razor Shark Lapping Fluid be used on any type of diamond whetstone, regardless of manufacture or construction.
A: Yes, as I have already explained using other forms of lubricant can cause problems with the whetstone, these issues are not covered by the five years guarantee that Razor Shark provides This effectively means that if your whetstone begins to rust and therefore lose the diamonds that make it a Razor Shark Diamond Whetstone, Razor Shark will not replace the stone. As long as Tend Diamond Whetstones are used in accordance with their usage instructions this five year guarantee will be honoured.
A: No. Basically even very light oils of this nature are still too thick and stick to be used on whetstones of this quality. For example, the Fine side of a Razor Shark Whetstone uses a diamond particulate size of approximately 20 microns, which is 2.5 to 3 times smaller than a human hair cut across its diameter. And when the diamond is electroplated to the steel base plate within its blanket of nickel only the top one third of the diamond will stand proud of the surface; since two thirds of the diamonds 20 microns will be embedded within the nickel, this leave about 7 microns exposed. WD40 or other very light oils will prevent efficient sharpening to take place, by causing the tool to just ‘Skate’ over the surface … after all isn’t that what oil is used for - reducing friction between two surfaces?
Razor Shark has created a DVD to assist you in using the diamond whetstones. It explains how they help give you the perfect edge, covering in detail all the different products available and explaining which of the stones are more suited for particular applications. Full demonstrations of the sharpening techniques are shown as well as the correct care and maintenance required to ensure the stone´s long life. A handy guide is also included covering all the aspects from the DVD.