Diamond blades are currently the number one choice for cutting tiles. The blades are of different grit sizes of diamonds. Suppliers of diamond blades agree that coarse diamonds generally remove more materials and cut faster compared to others while fine ones make use of high-quality tile cuts for polishing and smooth cutting.
Different processes combine the diamonds in the blades with different materials. The type of bond is one of the determinants of the blade. Here are the bonds used for diamond blades.
These comprise multiple diamond layers impregnated inside metal matrix containing tungsten, cobalt, nickel, bronze, and alloys of these metal powders. These materials are sintered or hot pressed to achieve various levels of full density based on the sintering temperature, applied pressure, and heating rate and time. Sintered diamond blades wear evenly but are exceptionally durable. They are best for cutting hard material with a 45-75 rating on a Rockwell scale.
Resin-bonded diamond blades are typically used for minimum surface chipping and creating a smooth surface finish since they are soft. The resin used for the bonding is a tough phenolic resin but cannot bond strong, high-quality diamonds. The diamonds used in resin bonds are hence medium, and poor quality ones and the blades created are thin with a high wear rate.
Electroplated diamond blades are the least costly ones and are ideal for small cutting tasks. They are also suitable for dry cutting and cutting of thermoplastics and pre-sintered materials. Electroplating uses a high diamond concentration to create a bond but the blade formed is less durable compared to resin-bonded and sintered blades.
The above bonds are not just for holding a blade’s diamond crystals. They also support the diamonds, allow protrusion of the diamond when cutting and act as an absorbent for the heat produced when cutting. The ideal type of bond primarily depends on your task.