Shun Fuji Knives

[jamesrieger]

Hi!  I have a set of Shun Fuji Knives and was wondering if anyone knew the type of steel they use.  I have a Tormek T8 with wheels featuring grit sizes ranging from 220 to 1,200.  They are getting dull, and I wanted to know which grit you think I should start with first.

[Sir Amwell]

It depends on the condition of the knives.
If they are just needing a touch up then match the angle and maybe start oa 600 grit?
If they are badly damaged and need a re grind or re profiling then start lower.
Remember that all the hard work is done at lower grits.
Establish your edge and then refine and then de burr/ hone.

[tgbto]

Shun Fuji have a SG2 core, which can be tempered to a high hardness. If they are severely damaged, starting with a coarse diamond wheel or SB wheel may speed up the process. They will still sharpen fine, albeit a bit slowly, on the SG wheel. I would also recommend a longer honing with a lighter touch.

[Royale]

From my limited personal experience running my own sharpening business...

If it's the first time your knives are meeting the T8, save yourself time and start at 220/360 grit. Reprofile the entire edge and work your way upwards to your 1200 grit (LA-220 inclusive)

When they start to feel dull again, start with the LA-220 first, before you decide if you want to break out the grindstones for (re)sharpening.

[jamesrieger]

Thank you!

[jamesrieger]

Thank you for your excellent advice!!!

[John Hancock Sr]

Shun Fuji have a SG2 core, which can be tempered to a high hardness

It appears that SG2 is also a "powdered" steel which is interesting. The claim is that it is "easy to sharpen" so it should fine with silicon carbide (the Tormek SG wheel) which would be convenient.

If you are getting glazing on you SG you may need to use something harder like the SB, CBN or diamond.

I have a powered metal chisel from Veritas and although I can sharpen it with the SG wheel it is slower and more problematic than my carbon steel chisels.