Bonded abrasives have abrasive grains held together by a bonding agent, while coated abrasives have abrasive grains adhered to a backing material. Bonded abrasives are typically used for heavy-duty applications, while coated abrasives are better suited for finer finishing tasks.

Common abrasive materials include aluminum oxide, silicon carbide, and ceramic. Aluminum oxide is a versatile and durable choice, while silicon carbide is harder and more durable. Ceramic abrasives offer the highest level of performance and are often used for precision grinding.

Consider the material you are working with, the desired finish, and the type of equipment you will be using. For example, a coarse-grit abrasive will remove material quickly, while a fine-grit abrasive will produce a smoother finish. It's also important to match the abrasive part to the type of machine you will be using.

Always wear appropriate safety gear, including eye protection, gloves, and a respirator. Keep the work area well-ventilated and free of dust. Inspect abrasive parts regularly for damage and discard any that are cracked or broken.