Silicon carbide finishing stones vary from aluminium oxide finishing stones in that the particle shape of the grain is thinner and sharper than aluminium oxide particles.

Silicon carbide particles shave a narrow cut in the material being polished and produce a less brilliant finish because the narrow cut does not reflect as much light.

Silicon carbide tends to shape easily to contours and is typically fast cutting and breaks down quickly.

This polishing stone can be used to polish even the hardest die and mould steels.

Polishers claim excellent results with the CS-HD when finishing dies ranging in hardness from 47 to 63Rc.

 This stone should be used with a lubricant.


Inside the kit, you will find 5 abrasive stones and the proper lubricant required for these types of stones.

Directions of use:

Before use, you should use a ceramic or silicon carbide belt or a grinding stone to grind a 45-degree chamfer onto the end of the stone.
put a few drops of the stoning oil onto your blade and sand out your grinder marks in a reciprocating linear motion.
The slurry that forms on the blade is what helps break down the stone resulting in faster sanding, so don't wipe it away too often!

it is recommended to use a strip of sandpaper to get an even finish between your grits to make it easier to spot scratches you have missed.
and you should also use sandpaper to get your final satin finish if that is the look you desire.


Boride Polishing Stones

  • The stones are 1" x 1/4" in profile and  6" long.

    Standard: 150, 220, 320, 400, 600

    Fine: 320, 400, 600, 800, 1000, 1200