Thread: Maximum Hollow Kamisori

Man that looks awesome!

Is that slightly thicker part in the middle of the blade for added stability? I love the way it looks.

Thank you all for your kind words.

@str8fencer: Thank you! The blade is very flexible, even a soft touch makes it flex from the edge to the belly.

@Swerve: You are right, this is not a real kamisori. Fixed straight surely is the better term.

@ZeroCool: Thank you. Yes, the thicker part (belly) gives a bit more stability. Without it the blade would be to flexible.

cheers,
Ulrik

Great griding skils and geautiful razor.
Do you have some WIP pictures? What did you use for grinding that profile?

Thank you.

Unfortunately i did not take any wip pictures. Maybe i take some next time i make such a grind.

To create such a profile you need at least two different contact wheel sizes. The more different sizes, the thiner the final grind can be made.
I started with a 20cm Wheel and made a grind to nearly zero at the edge. It is important to have a perfect grind at this point, any mistake will make the rest much more difficult.
Next is a 10cm wheel with a hard coating that is very aggressive. With this one i grind till i nearly reach the edge. Then i change to a soft 10cm wheel an grind the rest exactly till i reach the edge. The blade is now hollow ground but hasnt the belly yet.
To achieve this i change to a 5cm wheel. I start grinding at the spine and often change the side to get it symmetrical. This needs to be done till both grinds nearly match in the middle of the blade.

I hope this is quite understandable ;-)

cheers,
Ulrik

Thank you very much for your instructions. Do you have some jig or you grind free hand?

No problem.

I do the grinding free hand.

cheers,
Ulrik

WOW! Great skils you have!

Gosh that must sing when shaving.
Very thin and very impressive work.
Thank you for sharing your skills.

Originally Posted by Ulrik

Thank you.

Unfortunately i did not take any wip pictures. Maybe i take some next time i make such a grind.

To create such a profile you need at least two different contact wheel sizes. The more different sizes, the thiner the final grind can be made.
I started with a 20cm Wheel and made a grind to nearly zero at the edge. It is important to have a perfect grind at this point, any mistake will make the rest much more difficult.
Next is a 10cm wheel with a hard coating that is very aggressive. With this one i grind till i nearly reach the edge. Then i change to a soft 10cm wheel an grind the rest exactly till i reach the edge. The blade is now hollow ground but hasnt the belly yet.
To achieve this i change to a 5cm wheel. I start grinding at the spine and often change the side to get it symmetrical. This needs to be done till both grinds nearly match in the middle of the blade.

I hope this is quite understandable ;-)

cheers,
Ulrik

One more question.... Did you hadrening blade before grinding or somewere in the middle of this procedure?

I always do the rough grinding with the 20cm wheel before hardening. But i leave about 0,5mm at the edge.
The rest is done after hardening.