GETTING STARTED
Unbox your Jotung 7 and Magnet Knife Holder. You'll find that the Jotung 7 has a Diamond Disc (Top) and Fine Grit Honing Disc (bottom) as well that both sides of the Knife Holder are equipped with powerful magnets.
15° sharpening angle
You can use the 15 degree angle for harder blades, for example Damascus knives or blades with a core steel that has a higher hardness degree. These knife edges can be ground to a very fine finish while retaining their stability.
20° sharpening angle
Almost all kitchen knives can be sharpened with the 20 degree angle, as it is a common angle in the kitchen knife industry. You won't go wrong with this one. The knife retains its sharpness for a long time due to the stable cutting edge. The 20° is also suitable for many pocket knives that find their daily use outdoors.
KEEP IN MIND
A 20-degree angle is a more robust angle than the steep 15-degree cutting angle which might offer more precision. Western knives are generally made with a softer variety of steel that is more forgiving to the high-impact style of cutting we do in the West, rendering them too soft to hold a narrower 15-degree angle for very long. Thus, if you change their angle from 20 degrees to 15, they will require more frequent sharpening. Japanese knives usually are made from a harder, more brittle steel that holds a narrower edge for longer and thus can support a 15 degree angle.
SHARPENING PROCESS
1. Place the Jotung 7 on a stable surface. Ideally on a cutting board or kitchen counter. Attach your knife to the preferred sharpening angle via the integrated magnets.
2. Now the grinding process can begin. Start with the diamond disk. Hold the magnetic holder with one hand and grab the Tumbler Rolling Sharpener on the wooden cylinder with the other hand. Move it back and forth with the diamond disk along the entire cutting edge. Do the movements with little pressure. It should feel effortless. The diamond is extremely effective and will grind enough material from the edge even if you don't press hard.
SAFETY INFORMATION
Risk of injury from sharp blades
Use the Jotung 7 on a non-slip, clean, dry and level work surface. Hold it
only by the roller grip during use and avoid dangling a finger. By touching
the knife’s edge there is danger of cutting yourself badly.
Danger due to powerful magnets
The magnetic angle support contains strong neodymium magnets and
should therefore be kept out of the reach of children. Magnets can cause
damage to things like bank cards, pacemakers, computers, mobile phones
and other electronic devices. If in doubt, exercise extreme caution.
Care and maintenance
The Jotung 7 and the magnetic angle support should be protected from
water. If necessary, you can clean the diamond grinding disc with a
pencil eraser to remove any grinding residue. When there is a lot of
contamination, the diamond grinding disc can be unscrewed and
thoroughly washed in warm water, with a little washing-up liquid and
a brush.
3. Sharpening the blade on one side may result in a minimal burr at the tip of the cutting edge. To smooth this out, turn the Jotun 7 and start the same movement process with the Fine Grit Honing Disc. Here you need a maximum of 6 repetitions. This is sufficient to remove the burr.
4. The first side of your blade is now sharpened. Rotate the knife by 180 degrees and mount it with the other side of the blade on the magnetic holder. Start the grinding process so that both sides are sharpened at the same angle.
5. After sharpening your knife with Jotung, clean it with a dry towel. You will notice the dark abrasive dust that the diamond wheel created when removing the material from the edge. This is a sign that you have achieved an effective result with the Tumbler.
IMPORTANT
The first grinding with the Jotung may take 5-8 minutes, depending on the condition of the blade and its hardness. Your knife will probably not have an exact an accurate grinding angle of 15° or 20° from the factory. The edge of your knife must first learn the new and constant sharpening angle. After you have reached this stage and your knife has the exact angle through the Jotung sharpener, each further resharpening takes only 1-2 minutes.