Photos 2 Swedish Air Force survival knives

While busy with finetuning the handle the knife slipped out of my rubber coated vise and fell from a measured hight of 1.10 meter on one of the concrete sidewalk tiles which form the floor on my balcony, and landed on the belly part of the edge.
I did not try to catch the falling knife :)

To my surprise there was only slight denting in that area, no large chips, which i would have expected given the presumed high hardness in combination with the narrow edge angle.
Anyway, due to this i had to regrind the blade again on the green silicon carbide side of my Foss 7205 stone, and that is where i am now.


 
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kwackster said:
While busy with finetuning the handle the knife slipped out of my rubber coated vise and fell from a measured hight of 1.10 meter on one of the concrete sidewalk tiles which form the floor on my balcony, and landed on the belly part of the edge.
I did not try to catch the falling knife :)

To my surprise there was only slight denting in that area, no large chips, which i would have expected given the presumed high hardness in combination with the narrow edge angle.
Anyway, due to this i had to regrind the blade again on the green silicon carbide side of my Foss 7205 stone, and that is where i am now.
Click to expand...

Too bad, well done, glad it wasn't worse.
 
kwackster said:
Currently experimenting a bit with different grits of diamond paste on thin cardboard to see what gives both a nice blade finish as well as a good apex.

Already found that only removing the burr is not enough to get the sharpest of edges on this steel, i have to continue stropping a bit to also get the (presumed tungsten) carbides into the right shape.
I also have to tinker some more with the appearance of the blade finish (now it's a bit too shiny for my taste), but the current apex is reverse hairwhittling sharp (chest hair) @ ~20 degrees inclusive.



Click to expand...
They are booth looking good B :) I am not yet into that part of my Swedish heritage, still focusing on folders from the period late 1800 to early 1900. But this thread is inspiring :)
 
Pictured are two Norwegian Foss 7205 combination black/green SiC sharpening stones; the one used with WD40 oil for regrinding the two Pontus Holmberg knives, and an unused new old stock one i intend to use with water.





 
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Very impressive indeed. Looks tedious to do by hand.
 
For me regrinding old school & high quality knives such as these by hand is the only way to do it right.
A belt grinder can take off too much steel very quickly and mess up a valuable knife in no time, while a quality bench stone allows me to slowly & precisely dial in the overall blade shape together with that most important edge angle, plus it accomplishes all this without any heat build-up.
For this kind of work speed is not my friend, also because my eyesight isn't what it was 5 years ago.
 
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