Replies

1. 
   esch5995 | Jan 03, 2024 07:37pm | #1

   If you are asking about black silicon carbide sandpaper you first need to know what grading standard the manufacture used. If it's labeled with a P it uses the European FEPA standard and it would be around P4000-P5000. If on the other hand it is graded on the CAMI or ANSI scale it would be around 1200. Unfortunately Silicon Carbide paper wears quickly when used on metal. I would suggest using 3M lapping papers which will last much longer.

   You can get a complete Scary Sharp system from Taylor Toolworks for a small investment or buy just the films.

   https://taytools.com/collections/supplies-sharpening-scary-sharp-system/products/three-sheets-5-16-x-5-x-12-float-glass-and-7-sheets-3m-psa-lapping-film-for-scary-sharp-system

   
2. 
   boxbrush | Jan 03, 2024 09:31pm | #2

   Thanks, I'm in Australia where everything is expensive and impossible to get.

   I've glued it back together and will probably glue it to a base to hold it all together.

1. 
   esch5995 | Jan 03, 2024 10:10pm | #3

   Make sure you lap it after you do to try to insure a flat surface

3. 
   ajg1942 | Jan 03, 2024 11:03pm | #4

   I believe King water stones use the JIS standard, I have seen sites that specifically state that King's grits follow JIS ex:

   "Note: All grit grade specifications refer to the Japanese JIS norm."

   https://www.fine-tools.com/king-stones.html

   Here is a chart which compares grits across specifications/manufactures by grit size

   https://www.gritomatic.com/pages/grit-chart

   An article on grit fundamentals (good read)

   https://www.gritomatic.com/pages/grit-fundamentals

1. 
   boxbrush | Jan 04, 2024 12:03pm | #5

   Thanks, will come in handy when this wears out.