Usually, we need to consider the structure of the parts, the size of the grinding wheel, and the speed of the tool and other fixed circumstances.
The SP series product is a kind of laminate structure, the edge surface is the cutting face, the cutting is relatively higher than convolute wheel, it has no rotation direction.
Convolute wheel series (LDP, DEXL, RF, LP...) is the winding structure, the inner hole size is generally 1, 3, 5, 8 inches, plane surface is the cutting surface. When it is used, it is directional and can only rotate in one direction. The arrow identifies the direction of rotation. The convolute wheel is more durable than the SP wheel, which is more suitable for sharp and harsh applications such as deburring.