The standard shapes most commonly used in tool & cutter grinding are:

• T-6: Straight Cup Wheel
• T-11: Flaring Cup
• T-12: Dish Wheels
• T-50: Plate Mount Wheels

The shape of the wheel is determined by the shape, size, and accessibility of the part to be ground. When grinding peripheral cutters, cup wheels are used. Dish wheels are best for formed cutters.

• WA: White Premium Aluminum Oxide is used when a good cuting action is needed on all steels. When a sharp corner or radius must be held, use fine grits combined with J or K hardness.
• GC: Green Silicon Carbide is used for non-ferrous metals such as cemented materials.
• PA: Pink Aluminum Oxide is used for high alloy steel applications such as sharpening HSS cutters, reamers and chisels.
• AS3: Ceramic Aluminum Oxide is used for fast metal removal; excellent for grinding 50 Rockwell C and harder.