<Tr> <Td> Oxychloride </Td> <Td> O </Td> <Td> Made from an oxohalide </Td> </Tr> <Tr> <Td> Plated </Td> <Td> P </Td> <Td> Made by Electro / Electroless bonding of metal to hold abrasive </Td> </Tr> <P> To the right is an image of a straight wheel . These are by far the most common style of wheel and can be found on bench or pedestal grinders . They are used on the periphery only and therefore produce a slightly concave surface (hollow ground) on the part . This can be used to advantage on many tools such as chisels . </P> <P> Straight Wheels are generally used for cylindrical, centreless, and surface grinding operations . Wheels of this form vary greatly in size, the diameter and width of face naturally depending upon the class of work for which is used and the size and power of the grinding machine . </P>

What does the code number on an abrasive wheel show