Been interested in this Vulkanus from Böker myself.
As I am a novice at sharpening (got a couple of stones and some massive hand turned grind-stone that came with a barn of a house I bought)and I would like something simple to start with. Would Vulkanus be any good for this?
Was alarmed about the shavings thing as well, maybe just low grade kitchen cutlery is the cause? But the idea of bits of a decent knife coming off, er...
Thought about the Sharpmaker but it seems to demand a lot of skill and experience.Appreciate more views thanks.
Willgoy,I do think it's the knife, that's the cause of the shavings and especially low grade cutery that's the cause.The Knife that I used on my Boker Vulkanus was a Sheffield brand, 5'" utility knife, with a steel bolster and some kind of black plastic overmolded handle.which I bought from a clearance store for a few bucks,a couple of years ag

n the package,it didn't say what type of steel it was but after only a few uses around the kitchen it's absolutely dull.
Also I wanted to clarify that when I wrote shavings(strips of metal), I actually meant fillings(like dust) instead,Sorry to ALARM those who read my review.
I also what to note that the Boker Vulkanus is more of a Steeling device(ex.Butcher's Steel) than a sharpener, that it doesn't actually sharpen but maintains a knifes edge.So if your knife is extremely dull it has to be actually sharpened on a honing stone or other sharpening device ex.Gatco,Lansky,sharpmaker etc. So what I'm saying is that your knife has to be reasonably sharp to begin with in order to maintain a razor sharp edge.
But for me,my knife ,as I suspect is the low grade variety can be sharpened using the Vulkanus's Sharpening mode then on to the Honing mode which produces a sharp edge which is not razor sharp because this acts as a sharpening steel.
On one occasion,I was using my brothers Victorinox utility knife in the kitchen and found that while cutting tomatoes that the edge just wasn't cutting it.So I stopped cutting and tested the edge on my thumb to determine whether it's sharp and discover that the edge was bent to one side.So I used the Vulkanus in the honing mode and after half a dozen passes(5 - 10 seconds) the edge was straighted or restored and cutting tomatoes again.
I have also sliced grapes hanging on the vine in my hand and have the pieces hanging on the skin or on the ground.
I would say that the Boker Vulkanus is handy around the house not to mention kitchen when quick results are required.