Dc-250 - Df-250 - Sg-250?

[Swemek]

Hi all,

I have two Tormek diamond wheels, course and fine. I also have SG-250 wheel which has never been graded course, so it still has the 250 mm dimension since I only use it as the final step after the diamond wheels, used as Tormek Japanese water stone, if you will, but with courser grit.

Many times DE-250 (grit 600) is the final step, this give me good enough result.

Wanted to ask you all if you see any reason to have the 1200 grit diamond wheel, as long as my SG-wheel keep it's dimension but also remains true?

To my eyes the result from SG-250 (graded very fine, with a finer grit than the fine git side of the Tormek grading stone) gives a beautiful edge to finalize on my leather wheels.

Is there any practical or theoretical pros with using diamond (or CBN) as the last step of sharpening super steel's like m390, rather than traditional aluminium oxide stone?

I I'm aware that deburring on diamond can give high vanadium steels better edge retention.

Thanks!

[Ken S]

One overlooked solution is to make the final pass or two with your DF-250 with VERY light pressure. This is demonstrated in the online class covering the T2, but can be applied to any Tormek. This is very fast, not involving any wheel changing. It is also very cost efficient, as no extra expense is involved. It gently transfers the initial honing from the leather wheel to the grinding wheel.

Ken