Norton Metal Depressed Center Abrasive Wheel, Type 27, Aluminum Oxide, 7/8" Arbor, 4-1/2" Diameter x 1/4" Thickness (Pack of 5)

"Norton Metal Depressed Center Abrasive Wheel Type 27 Aluminum Oxide 7/8"" Arbor 4-1/2"" Diameter x 1/4"" Thickness (Pack of 5)" Norton Metal Type 27 depressed center wheels have versatile aluminum oxide abrasive for use on many metalworking applications, such as cutting iron alloys, steels, and other ferrous (iron-containing) metals. Reinforced wheels are designed to resist breakage caused by severe cross-bending and are required on any operation where the work is not securely clamped. Resin bonds are organic bonds that soften under the heat of grinding, releasing dulled abrasive grains. Because of its forgiving nature, only an organic type bond is used in cutoff wheels. The resin-bonded wheel is more resilient than a vitrified wheel. The manufacturing term for a resin bond wheel is "cured," meaning the wheel has been heated to less than 500 degrees F. Depressed center wheels are flat faced with inset centers and are used for cutting off and portable grinding. The depressed center prevents the tool mandrel from...