Do you have any questions? We can provide the answers!

Certainly! Hold the knife horizontally and turn it with the bevel towards the sharpening insert.

Also no problem! Do the same as for a knife with a serrated blade.

The process is the same as for classic knives.

No, definitely not! These knives are made of a very hard and delicate, brittle material. You would damage both your knife and your VulkanUS. Take the knife to a professional sharpening service.

The sharpening inserts are made of a hard metal with a very high level of hardness (around 93 HRC). As this is not a ceramic material, it is still tough enough not to be sensitive to shocks. With these properties, it is ideally suited to removing material to create smoothness both very quickly and gently.

When closed, the sharpening insert has an angle of 11° from vertical. This changes, depending on the depth to which the blade is pushed into the VulkanUS during sharpening. The maximum is 21°

The angle here is also in the range of 11° – 21° from vertical.

We recommend checking the blade sharpness after approx. 4 draws and repeating the process if necessary. You will then achieve optimum sharpness with minimal wear on the blade.

Hold the VulkanUS on the top edge and ensure that no fingers or other body parts are sticking into the opening. See the illustration in the handbook.

The cutting edge shifts towards the back of the knife each time it is sharpened. As the blade becomes thicker, more and more material has to be removed. When the cutting area is used up, have it ground again by a sharpening service.

We do not recommend them. The diamond dust coating acts like sandpaper and leaves a rough cutting edge, which wears more quickly. In addition, you will
need to use different tools for different processes, such as repairing, sharpening and polishing. That takes more time, especially if the tool inserts have to be changed. You would achieve a truly smooth cutting edge only with a very fine polishing insert and a lot of time.

Even with the daily training undertaken by chefs and butchers, you will never achieve the consistent bevel quality of the VulkanUS. In addition, the sharpening steel only straightens the cutting edge; it is hard to “sharpen” a blunt knife with it.

Here too, you need a lot of experience for an optimal result. The many whetstone types and methods will not make it easy for you. In any case, this is a time-consuming process.

These sharpeners are technically of the simplest nature and do not handle your knife particularly carefully. With its variable bevel angle, the patented VulkanUS guarantees an optimum balance between result and gentle handling of your precious knives.

Sharpen only clean knives. Grease acts like a lubricant and makes sharpening more difficult. Regularly clean the filings from the VulkanUS with a damp household sponge. In rare cases, e.g. in the event of contamination with food residues, cleaning in the dishwasher may be necessary.

Clean off any metal filings stuck to the knife.

If used properly, the sharpening inserts will last for several years. They can be replaced easily with a spare parts set available from specialist retailers.

Watch the videos on use. These explain smooth handling of your VulkanUS device and can be found on our YouTube channel or here with the respective product.

The device is essentially designed to be exceptionally robust and sturdy. It has a 2-year manufacturer’s guarantee. Nevertheless, if an unexpected defect occurs, please contact us directly.