Zirconia goes through a phase change when force or heat is applied, therefore it is good to use cooling when working on zirconia. The different phases of zirconia have different sizes and changing phase puts a strain on the material.

FWIW...watched WorkSharp's several videos about this and splurged for your Ken Onion model and diamond belts. It was a curiosity/impulse buy but I've been very pleased. Reasonably priced; easy to understand and use; restored ALL of my ceramic knives to like-new condition quickly and easily. Compared with other expensive and time-consuming alternatives, your machine and method are very impressive.

Hi Doug! Love these instructional videos. I just got my Ken Onion edition this morning. So far, I've sharpened my 9" Rapala fillet knife and my 4" Zyliss paring knife to, what could only be described as "LASER SHARP"! I used a 17 degree angle on both of them with minimal passes - 5 right, and 5 left, then to the progressively finer belts with the same treatment. I'm completely AMAZED by how sharp both these knives have become with such little effort. However, I opened the diamond belts that I ordered and started in on my Kyocera ceramic kitchen knife - and I've hit a wall. I've actually dulled my ceramic knife! I started with the 180 grit and had to do 30 passes per side - TWICE! Then I switched to the 1500 grit and repeated those 30 passes. I'm using a 22.5 degree angle and I'm reasonably certain that my technique is not an issue here considering the results I'd achieved with my other steel-blade knives. Am I doing something wrong with the ceramic knife? Too large an angle? Have I ruined my Kyocera ceramic knife? It's my favorite veggie slicer and I'd hate to think I ruined it! Any suggestions at all would be appreciated. Thanks in advance for your time!

That was EXTREMELY helpful! Thank you so much!

I have a range of decent knives in our home kitchen. Even so I do find myself reaching for the ceramic knife quite often, and I suppose it was inevitable that I'd lose that edge. I wasn't sure if it could be resharpened or not, so thanks to you I'm now all good to go. Thank you.

Glad you gave a description of what they are actually good for and what they are not good for. I think we are going to stick with our carbon steel and victorinox knives. Thanks for the information.

Thank you Doug, for that info I've been looking something to sharpen my knife.. And that is a amazing tool .

I bought a ceramic knife in bad shape at my local flea market, it had a broken tip and lots of chips, I reprofiled the tip and took out the chips,sharpened it with a set of cheap Harbor freight diamond sharpeners,it took me about 10 minutes. Good video.

Very helpful, thanks! I was wondering if it was possible to raise a burr on a Zirconia blade, so I’m glad you addressed that.

Yes, great video, good background, too. Thanks for sharing.

Outstanding! Thanks a lot!

Hello Doug another great program

Very nice video, thank you!

very nice place you got! SPACE! would love something similar, my compliments

Thank you do much Doug!!!!

Real good info. Thanks

You had me at good quality junk, also usefull since all my ceramic blades are about ready..

Good Video. I have a Work Sharp sharpener and it works great !

Good info!

Hahaha... I lived in Palmdale for 23 years! Thanks for the tut!

Thanks Doug, beats the hell out of the old ceramic crock sticks. I had not seen one of these little machines at work. Interesting enough to do a Bing. Looks like $70 on ebay with different shipping fees and $80 at Bass Pro with a specialty gift card. I do not think you can buy a fish hook at BP for ten bucks.

is any way to fix a breaking knife like the one you have i break my knife which i payed 230$

I could not find diamond belts for the WSKTS. How do I get a set?

Does the Ken Onion machine work with the diamond belts?

Nice video Doug, where can I buy this sharpener?

I like your style sir,, I really like your style(!):)

i have the Ken Onion edition but can't seem to get my ceramic knifes sharp. they cut paper ok, but when i try to cut a tomato, they just slide across the skin. how can i get the knife sharp so it will cut a tomato?

How many chipped knifes can be sharpened with the special set of diamond belts?

Appreciate your video, Doug! Say, what speed did you use … Low?

Hi.... Good video... On 1500 grit diamond belt,you sharpen left-right-left-right... Do you reverse the belt travel for each pass ? Thank you.

what's the voltage on that? We use 220v here is that 110-220v sir?

Very informative. Thank you. BTW, how long have you live in the desert? When I served with the US Army back in 1968, I was stationed at Fort Irwin, Ca. for about three months from October to December. Never realized it could get so cold in the desert at night. How far are you from Fort Irwin?

Can you help me where is this sharpener and diamond belt sell. I'm from Vietnam. Thank you! :)

If not tools like that what the other material name can use

I can't find diamond belts . Where do you buy them ?

You should show a tutorial on how to sharpen wharncliffe knives

Good video..... It was nice to see those diamond belts go to work. I know they don't recommend the diamond belts on steel, but I wondered if maybe you have given it a try? I think it's most likely due to the aggressiveness of the diamonds.

do i have to use diamond sharpeners for ceramic knives? will a regular benchstone or ceramic rods damage the blade while sharpening?

2:03 freakin’ humongous chuck taken out of the blade: “You can see there’s a nick in the blade here.”

ok yea it's all nice n dandy but what about the knife that had a chip what do you do with that ? why didn't you show how you would fix that &take the nick out of it instead ?????

I see it rounded the tip, how do you avoid that?

It is a very nice machine. I want to purchase a machine. Where can I buy it in India and how much cost?

What is that belt sanders manufacture?

Thanks for the guide. Yes, ceramic not good for prying. You might want to take a look at Kyocera knives, does not seem to break easily.

why the motor on/off burst for every stroke? why not just keep it running?

So I click on this video and I immediately say that's the AV! And it IS!!! ha ha cool I grew up there left about 11 years ago.

But still... I can’t see getting one if already have a nice steel pairing knife. I’ve got a couple.. never used them. Maybe I’ll try them on some fruit for fun.

2013 ... hmmm, well, still, thanks for the video. I was left wondering (1) what you advise for those who don't have such a gadget, and (2) why (assuming the gadget belt goes only one direction, and you didn't reverse on us) you sharpened in opposite directions for the 2 sides of the knife--in other words, one side was sharpened 5 times with the grit running OFF the edge of the blade, then 5 times on the other side of the jig, with the grit running ONTO the edge of the blade. Best of luck.

I just saw the first 5 seconds of this video and thought "Looks familiar.... wait, if he moves that car, there's a meth lab underneath yea?"

It is the only thing to easily cut my carbon fibre ropes. It gets only used for that. But good to see how to sharpen it.

what kind of sharpener is that?

shame you didn't demonstrate the chipped one to restore or resurface the blade

Hi how many strapping did you use i think i counted 8 on each side, thanks

If you stop the belt with the tip of the knife in the center of the belt you won't round the tip off don't pull the knife all the way thru

You should pull a gag on people and drag that across your nail, scream, show an arm laying on the ground. Hehe!

If you can break a ceramic knife with compressive force, you've bought a shitty knife. If you manage to twist or wrench the blade apart, then you're not using it as a knife.

why do ceramic knives even exist it's basically a regular knife Wich isn't tempered with a funny name and color

I SHARPEN THEM WITH MY EYES AAAAAAAAAAAAAAAAHHHHHH!

Has anyone ever mentioned that you have enourmous beautiful hands

+Doug Holser the first run you did 5 on the right and 4 on the left on the pairing nife

guess , the knife was sharp before you began to sharp it.

it seems very good,but why not buy another ceramic knife? Our company provide high quality ceramic knife with EX factory price.

That's not stropping..........

Recently I purchased an 'ERAMIC KNIVES' Online.. Let me tell ya its fuckin' too sharp nd much better then any metal or Steel knive.. It never go dull nd no need for sharping it even after using it for a several many time too. Man it is so cool... Beside any metal nd steel knive have to.

Why show ppl how to round their blade tip? Why not show the the correct way? It is explained in the user manual!!!!!!!

only ignorant people use ceramic knives steel knives are more versatile, easier to maintain & sharpen, more reliable. and steel knives can stay sharp (actually sharper) just as long as a ceramic

so basically ceramic knives are GARBAGE... thanks for the video won't be being one EVER

Give me a good steel knife anyday! I've used a ceramic knife for years but they just don't compare to even a cheap Kiwi brand steel knife. The blade of the Kyocera is harder than any steel knife I know of but it is such a pain-in-the- _ss to sharpen. t

Only knife I use for mushrooms