The sharpening wheels are a bit too harsh, but it's better than a trip to A&E caused by a blunt knife
We bought this to sharpen all our knives, just because there is no knife sharpening shop near us.
We have some good quality professional chefs knives, but also we have a variety of cheap knives too, costing anything between ultra-budget £1 to mid-range £20 each. Also a mixture of old fishing knives, flexible filleting knives, gardening knives, penknives, etc.
Basically what this product does is when the electric motor is turned on, it turns a spindle on which are mounted 2 round sharpening gritstones. That's it. Not much to go wrong. When you turn it on it starts to operate, and it doesn't stop til you turn it off. That is to say, there is no sensor which detects when a blade is present.
The first thing we noticed is that the guide slots are not very precise. I'd expected the machine slots to guide the knife blade to touch the grindstones at the correct angle, which this doesn't do precisely. The first time I drew a blade through a slot, I cut the side of the slot, as they are just plastic. Trying to be more careful, I found I could use different angles, and you can even change the angle during the grinding, which I don't think is that great a design, as it allows user error, ... if a user can do it wrong, then inevitably some of us will ....
Next thing I noticed was the rough grinding feel, it feels and sounds quite harsh on the blade.
When we tried a short blade on a penknife it wasn't much use, as you can't get a short blade close enough to the wheel to sharpen it all along the cutting edge. So this is better for longer blades than it is for shorter blades.
The 2 grinding wheels are intended to be one for sharpening and one for honing.
Generally, sharpeners remove metal to make an edge, and a honer is supposed to straighten the rough sharp edge (when seen magnified) into a straight line for cutting. Which is why you should hone a blade before and after every use. A honer should not remove metal, just straighten it.
These grinding stones are in my opinion 2 sharpening gritstones, there is no real honer in my view. One gritstone is quite coarse, and it grinds quite roughly. The other is smoother, and grinds less roughly, but it still seems to grind metal off, so to me that is not really a honer.
I think on balance these both need to be finer grade, because our knives look quite scratched and not a totally smooth cutting edge.
What we found was, you still need to use a proper chefs steel to hone the blade.
Overall, this is a handy gadget to have at home, it does grind blades, and the cheaper the knives the less you'll mind any damage this does to them. But it's not really what we'd call a high quality product, so perhaps we should not be surprised if it grinds knives a bit faster and harsher than we'd really prefer.
And, you'd still need to buy a good quality steel to hone your blades. If you keep honing with this machine alone, I believe your knives may end up rough and wear out faster than you'd expect.
That said, it's better than owning no grinder at all. Blunt knives are a hazard. And this machine is not overly expensive compared to a trip to A&E; so probably on balance you are getting what you pay for. Unless you own expensive knives you care about, on balance this machine is worth having.
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