Tip Repair + Distal Taper

[paosquared]

after doing a tip repair, is it worth trying to fix the loss of distal taper?

 

[Benuser]

The cases can be very different, depending on how drastic the distal taper is and how much has been removed. Quite some blades have a relative thickening at the very tip. The location of the tip can be different: spear point, or low, as in traditional gyutos. You may want to thin the tip area far behind the edge for better performance. For a more precise answer, please let us know what kind of knife is concerned and how much length has been lost. Pictures would be very helpful.

 

[paosquared]

it's a yoshikane skd 240mm. i plan to take some material off the spine to remove the chip and not touching the edge.

 

[Benuser]

Looks like an easy job. I wouldn't worry about the distal taper — it's no vintage Sab with a paper thin tip. Still, after the work it will require some light sharpening to remove the burr at the end of edge. It could otherwise cause new chipping.

 

[Just a DK]

it's a yoshikane skd 240mm. i plan to take some material off the spine to remove the chip and not touching the edge.

Might not be the most qualified to speak on this subject, but also a beginner mistake i want to share that i did... be extra careful when going from the spine side instead of sharpening up from each side of the blade. I've tipped the edge again when I got close to being done cause how thin the edge is on a pink brick.

I've never had a re-tipping slowly moving the edge up.

 

[Benuser]

Working from the spine is the safest way to keep the original profile.

 

[gentiscid]

do this on a 400 grit stone and call it a day.

 

[NickMinton]

do this on a 400 grit stone and call it a day.

This. I’ve done this 5-10 times on Atoma plates and it takes 3-5 min

 

[antlerman]

it's a yoshikane skd 240mm. i plan to take some material off the spine to remove the chip and not touching the edge.

I have this knife too, how did you break it (so i can avoid doing the same)
what products do you avoid with this knife,
and how fragile is this steel compared with other options.
thanks.

 

[user 37848]

Try cutting w it first. See how you feel about it

 

[paosquared]

hi, i did the repair using diamond plate + 1k stone, it looks okay but i definitely lost some of the distal taper :<

how bad is it?

 

[NickMinton]

Looks fine on my end. How is the cutting performance?

 

[Uncle Danny]

I wouldn’t sweat it. Looks fine and as long as it performs the way you want it to, you’re all good.
I mean, if you want to go full monty, I don’t blame you, I would do it - but I’m no sane person.

 

[drsmp]

Looks good. A new Yoshikane looks slightly different .You can more closely match the as new profile by removing a bit more spine from tip up to the KU/hammered area. To avoid re tipping I would work only in heel towards tip direction. This should give a bit more distal taper as well

 

[Heckel7302]

hi, i did the repair using diamond plate + 1k stone, it looks okay but i definitely lost some of the distal taper :<

how bad is it?

Looks great. I would leave it. Thinning it out, then making it look nice again, will be a major undertaking and absolutely not worth it.

 

[paosquared]

Looks fine on my end. How is the cutting performance?

feels okay on an onion!

Looks good. A new Yoshikane looks slightly different .You can more closely match the as new profile by removing a bit more spine from tip up to the KU/hammered area. To avoid re tipping I would work only in heel towards tip direction. This should give a bit more distal taper as well
View attachment 300744View attachment 300745

hi, thanks for the advice. do you think you could show on my blade where i should take off material?

 

[drsmp]

Here’s an overlay - you’re very close

 

[paosquared]

Here’s an overlay - you’re very close
View attachment 300746

oof, i'll have to take some off the edge too?

 

[drsmp]

I wouldn’t touch the edge other than sharpen/strop after you’re done just take a tiny bit more off the spine from tip towards the KU (the grey above the white)
What you’ve done is also fine

 

[paosquared]

I wouldn’t touch the edge other than sharpen/strop after you’re done just take a tiny bit more off the spine from tip towards the KU (the grey above the white)
What you’ve done is also fine

so i started to do it but it was so much work for so little.... is this any better?

 

[drsmp]

Looks great !

 

[paosquared]

Looks great !

thanks! you can tell a difference? because i can barely tell lol

 

[drsmp]

After- Smoother transition from tip to spine

Before - A very slight bulge above the clad /core line

 

[paosquared]

Smoother transition from tip to spine
View attachment 300836View attachment 300837
A very slight bulge above the clad /core line

i see! that's see easy to miss .... do i need to do anything more? i'm just worried i took off too much material, as you can see in the initial chip pic where the cladding line meets the spine...

 

[drsmp]

Good as new, use and enjoy !