Depressed center wheels may also be referred to as raised hub wheels or by their shape designation Type 27, 28 or 29, with Type 27 being the most popular. The depressed center design allows the flange/lock nut to recess within the wheel so that it can be used for various grinding and cutting applications. Depressed center wheels are designed to handle the most severe right angle grinding applications from heavy stock removal to rough blending. More recently, depressed center wheels have been designed for cut-off applications when the tool is proper designed with flanges and guards. While large right angle grinders (7 in and 9 in) have been around for many years, small or mini grinders that handle 4 in, 4-1/2 in and 5 in wheels have made this machine and wheel category, the most popular in power tools.

Norton® RightCut™ Cut-Off Wheel, All Purpose, Series: DC7116M, 7 in Wheel Diameter, 1/16 in Wheel Thickness, 7/8 in Center Hole, Arbor Connector, 24 Grit, Extra Coarse Grade, Aluminum Oxide Abrasive, Wheel Type Number: Type 27, 8600 rpm Maximum, Resin Bond, Applicable Materials: Ferrous Metals, Gray Iron and Stainless Steel, Black Wheel

• Premium aluminum oxide for consistent performance at a competitive price
• Designed only for cut-off applications where a fast cut and minimum material loss are desired
• High performance bond designed for extremely fast cut while retaining excellent wheel life
• Excellent blend of performance and price
• Designed for quick cutting on right angle grinders with proper flanges
• With quick-change hub for tool free wheel changes to increase productivity