The manufacturer of High Chrome White Iron Grinding Disk tells you that the material of the grinding disc should be softer than that of the workpiece, so that the grinding powder can be embedded in the surface of the grinding disc. The grinding disc is made of pig iron, soft copper, red copper, brass, lead, and hard wood . Lead and hardwoods are used only for glossing after the workpiece has been ground to final size.

High Chrome White Iron Grinding Disk manufacturers tell you that the hardest abrasive is diamond powder; use diamond powder to grind hardened hardware. But diamond powder is very expensive, so it is rarely used. The second hardest is corundum. It is followed by corundum powder, silicon carbide and iron red powder. The most commonly used is emery.
The manufacturer of High Chrome White Iron Grinding Disk tells you that different grinding discs require different types of lubricants. Pig iron grinding disc needs kerosene or gasoline as lubricant. Mild Steel Grinding Disc - Use engine oil. Copper Grinding Disc - Use motor oil, alcohol, carbonated water. Where the quality requirements of the copper surface are particularly high, talcum powder diluted with alcohol or iron powder mixed with vaseline is used as a lubricant. The manufacturer of the High Chrome White Iron Grinding Disk tells you to use diatomaceous earth diluted with toluene and stearic acid or diatomaceous earth diluted with wood oil as a lubricant when grinding aluminum. When grinding copper alloys, use machine oil and fat as lubricants, mix the selected lubricating fluid with grinding powder, and then rub the mixture carefully.