The Oregon Products OR534-516-CBN Grinding Wheel, 5-3/4" X 5/16" X 5/8" is the most durable grinding wheels Oregon offers.

Besides lasting a long time, they also never need truing.  Also, because the wheels don't get smaller over time, you do not need to periodically adjust your sharpening jigs to compensate for wear.

Each is made of cast steel, precisely machined for accurate size and flatness, and electroplated with CBN (cubic boron nitride) particles.

CBN abrasive is almost as hard as diamond, so you can grind even tough steels quickly.  It's also a much better thermal conductor than the abrasives used in bonded wheels.  This, combined with the heavy steel body, means the abrasive surface remains cooler- you can grind right to the tip of the tool without overheating, so you spend less time honing afterward.

Product Specifications:

• Product Type: Grinding Wheel
• Wheel Size: 5 3/4'' CBN
• Maximum Pitch Size: 3/4"
• Special Feature: CBN
• Item model number: OR534-516-CBN