The 3M™ Cubitron™ II Depressed Centre Grinding Wheel is constructed of 3M precision-shaped ceramic grain to bring you an exceptionally fast-cutting and long-lasting rigid bonded wheel for heavy weld removal and other heavy-duty grinding applications. This grinding wheel works well on almost all materials and is specially formulated for use on stainless steel, mild steel, and aerospace alloys.The 3M Cubitron II Depressed Centre Grinding Wheel was made to perform at a level that delivers significant gains in productivity in both cut and life. Experience the power of 3M Precision-Shaped Grain to provide a cool, extra-sharp, quick cut long after other wheels are consumed. In medium and high-pressure applications, like robotic weld grinding, it is important to choose a high-performance abrasive that cuts fast and lasts long. The self-fracturing mineral in 3M Cubitron II Depressed Centre Grinding Wheels, will keep robot grinding welds running efficiently, ultimately reducing downtime. The 3M Cubitron II Depressed Centre Grinding Wheel is a rigid resin-bonded wheel that is approximately 1/4" (6.35 mm) thick and is useful for removing welds from internal angles. Fibre discs, on the other hand, typically work best for grinding welds on flat surfaces. The 3M Cubitron II Depressed Centre Grinding Wheel must be run on a right angle grinder with a wheel guard that is designed specifically for the size of wheel used. Type 27 wheels have a depressed centre to allow grinding at any angle without damaging the surrounding surface with the attachment. The 3M Cubitron II Depressed Centre Grinding Wheel must have a maximum operating speed greater than or equal to the maximum speed of the grinder used.