That depends on your style. If you reshape tools often or make some of your own tools on occasion, get the 80-grit wheel as your low grit wheel. If you don’t do that type of grinding much, then get the 180 grit. For sharpening and touching up your tools we suggest the 350 or 600. The 350 grit wheel is better for softer tool steel like M2 while the 600 works well with M42 and Powdered Metal. Use of our Wonder Slick Stick is suggested with both of those grits to help keep the wheel clean and from loading up with particles of metal. They will leave a scary sharp edge on your tool and remove very little metal, leaving you with a tool that will last a lot longer. We suggest you read the article by Tom Wirsing in our Blog section for additional guidance.
All our 8" wheels are constructed the same way and carry our famous lifetime warranty. Wheels with Radius edges are great for sharpening smaller hollowing bits and round nose scrapers. The main reason for this is the tool can be kept straight on the platform and just moved around the edge of the wheel. Wheels with grit on the side like the 4-in-1 (which also has a radius) and the Mega Square are great for doing non hollow grinds on skews. Our Kodiak sharpening platform has a fixture to hold the skew in the right position when using the side of a wheel. Our Spartan wheels are 1 inch wide with ¼ inch on the side. Our Radius edge wheels are 1.5 inches side with a ¼ inch radius on the edge and no grit on the side. Our 4-1 wheels are 1.25 inches wide with ¼ inch radius and 1 inch on the side. Our Mega Square wheel is 1.5 inches wide, no radius and 1 inch down the side. Please check out our video section to see an in-depth explanation of our wheels.
A good majority of our wheels are 1.5" wide, meaning they won't fit in traditional guards. While our CBN Wheels are perfectly safe to run without guards, we understand if you'd rather have gurads on your grinder.For grinders with guards, stick with either the 4-in-1 or Spartan profiles. For grinders without guards, any wheel will fit the grinder.