Howto remove 2cm from the tip of my Denka?

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konsuke

konsuke

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Question: I want to remove a large piece from the tip of my 240 Denka gyuto, to make it more aesthetic - along with flattening the profile. My most coarse stone is a 220 Shapton k0706. It didn't make a dent even after "many" high pressure strokes on the spine. The tip is quite thick. Will an Atoma 140 be enough to grind this down quickly or do I need something even more aggressive?

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Removing 2cm from the tip isn’t going to change the profile of the knife, it will just make it shorter. I have a hard time understanding how it will improve the aesthetic. Do you mean something like this?

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If yes, I would find someone with a belt grinder.
 
Belt grinder in Europe is rare and probably very expensive, but I understand there might be no other way.
 
rotary disc cutter (angle grinder)? just make sure you cool the steel plenty!
 
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You might be able to do it with a dremmel and a diamond blade. It won't be fast or easy, but it could work to get you to a rough shape, then use your stones. Start at the 140 and get it to the shape you want. Then work your way up. You could also go with a carbide hack saw but that would be a pretty crude cut.
 
This seems like a send it to a maker situation. Plenty of German or other makers in the EU could do this pretty easily and more precisely than DIY with a dremel.
 
This makes me queasy but I support the idea. Of course belt grinder would be ideal..

Orbital sander can work but it might still take a while. Again be careful with the heat generated (like, really careful) and wear protective gear when using power.

Personally? I would Some sort of Norton oilstone or a shapton pro 120 and about 5 hours of time. Clamp the knife and use the stone as an eraser.

But damn, 20mm… My hands are cramping just thinking about it.

Ps - I would keep the atoma away from this. It’ll end up aging a few years, possibly to the point where you need a new one.
 
konsuke said:
Already tried with no luck. But along with thinning and re-profiling, it's a good skill building exercise. And anyway, Santokus are child's play
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It is your knife so do what you want, but….I am pretty sure if you lowered the price enough you would be able to sell it and buy a 210 and at the end of it you will be much ahead. You probably were not able to sell it for the price you want and think is fair, but since you are ready to basically loose a significant value from your knife, you should try selling it for significantly less than what you wanted. If you do the modification you will loose a lot more than the $200 difference between 240 and 210 since that difference is for new knives from the maker. Once you modify your knife you can’t expect to get what you would for unmolested 210 example.
 
konsuke said:
Don't have a dremel, live in a condo, but might know somebody who has something like this - could it work?
View attachment 284130
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This is a random orbital sander. Not a practical tool for the work you're describing.

If you really want to modify it, probably remove the bulk of the material with some sort of cutting tool like an angle grinder. Then shape it with a belt grinder. It doesn't actually look like that much work unless you plan to grind off all the metal only with belts. I don't think you really need to do a whole lot of thinning afterwards unless you also do significant reprofiling of the edge.

Do have some sort of plan in place before you start to manage heat, to prevent from overheating the blade.
 
Just post a WTT thread to swap it for a 210? Since there's a large price gap between the two you might actually have a decent chance of someone wanting to trade you.
 
Then trade it for a Toyama? Or even just sell this one and buy a Toyama...
Personally I'm not really a fan of the stubby tips, but you do you.
 
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