New Norton Abrasives BlueFire Portable Foundry Wheels Reduce Grind Time More Than 40%. Norton, an abrasives manufacturer and provider of metal fabrication abrasive products, has introduced Norton BlueFire zirconia aluminum portable foundry wheels for the metal fabricating industry. BlueFire Portable Cup Snagging Wheels provide exceptional performance improvements over conventional zirconia products in foundries, welding shops, fabrication facilities, steel mills, and shipyards, including a reduction in grind time of over 40% and an increase of almost 130% in G-ratio.