1) Diamond grinding is efficient, and the grinding force of it is small. The grinding temperature generated during it is lower. This can avoid burns and cracks on the surface of the workpiece.

2) Diamond grinding’s quality is good, and its precision is high.

3) The diamond grinding tools’ consumption is low, and the tools have a longer service life. This can reduce the processing costs.

4) The processing conditions of equipment, tools and workpieces can be improved, and the energy consumption can be reduced. Also, the working conditions of the operators can be improved.

5) Diamond tools not only can process materials which common tools can not process, but also create conditions for developing new materials and new equipment.

1) The nature of the workpiece:

• If the workpiece is of high hardness, coarser grit diamonds should be chosen to reduce the heat generated in the cutting/grinding process and to improve the cooling conditions.

• If the workpiece is thin, coarser grit should be chosen, for thin workpieces are subject to being deformed by the heat.

• If the workpiece has good scalability, coarser grit can prevent or reduce the blocks on diamond tool’s surface.

2) The contact area between the diamond tool and the workpiece: When the contact area is broad, coarser grit should be chosen to reduce friction and heat.

3) In profile grinding, finer grit should be chosen to keep the form of the diamond tool’s working part.

4) The use volume of the diamond tool and operation conditions should also be taken into account.

The diamond grit is not the only factor to influence the processing quality and efficiency. The roughness of the workpiece’s surface is under the combined effects of diamond grit, volume of grinding, and especially the grinding depth, operation skills and the performance of the grinding machine.

Generally, diamond tools with coarse diamond grit have high processing efficiency but will also leading to high processing roughness; diamond tools with fine diamond grit is opposite. For a same roughness requirement, the grit of super-abrasives is finer than the normal-abrasives’. Under the premise of satisfying the roughness requirements, we should choose coarser grit to improve processing efficiency.

Different bonds of diamond tools have different hold capacities to the diamonds. For a certain bond, there is a best grit range. Normally, the best grit for resin bond is finer than 100/120, ceramics bond is 100/120 – 170/200, and metal bond is 70/80 – 230/270.

In addition, metal-plated diamonds have a lower processing roughness, so their grit can be coarser.

Below are two tables we can refer to when choosing the diamonds’ grit for diamond tools:

I also list some other points in my another article which also need to be considered.

1) Resin Bond: This bond itself has good elasticity and polishing function, but is subject to being burnt under high temperatures. The resin bond diamond tools have good self-sharpening capacity, and are not easy to be blocked. They seldom need several times’ repair . Their grinding/cutting efficiency is high, roughness is low, and the temperature generated in the processing is also low. As their these advantages, the resin bond diamond tools are widely used in half-fine or fine grinding for carbide cutting-tools or workpieces. Resin bond CBN tools are mainly used for the cutting edge’s grinding of high-vanadium HSS cutting tools, and half-fine or fine grinding for workpieces of tool steel, mold steel, stainless steel and heat-resisting steel.

2) Ceramic Bond: Ceramic bond has higher toughness and good heat-resisting performance. The ceramic bond diamond tools can cut/grind sharply and their efficiency is high. Over-heating and blocks seldom happen in the cutting/grinding process. Their thermal expansion is small, so the processing precision can be easily controlled. They can be repaired easily. They are normally used in coarse or half-fine grinding, profile grinding with broad contact area and grinding for superabrasive sinter.

3) Metal Bond: There are two kinds of metal bonds: bronze and electroplate. Bronze bond has good rigidity, high toughness, good wear resistance and long service life. It also has good shape-keeping performance and can withstand larger workload. However, its self-sharpening performance is bad. It is subject to block and is difficult to be repaired. The bronze bond diamond tools are mainly used in cutting and coarse or fine grinding for non-metal materials, such as glass, ceramic, stone, concrete, semiconductor materials and super-hard materials, and a few of them are used in the coarse grinding for carbide alloy, profile grinding and honing. Bronze bond CBN tools can be used in profile grinding for metal materials and honing for various alloy steel.

Electroplate bond has an even higher toughness. The electroplate bond diamond tools have a thin abrasive layer in which the density of the abrasive grains is high. The tool is sharp and its cutting/grinding efficiency is high. It is economical and does not need repair, but its service life is short. Electroplate bond is suitable to be used to manufacture profile grinding tools with complicated forms, small grinding heads, trepanning tools, saw blades and electroplated reamers, and can be applied in high speed grinding manners.

Some cup wheels’ segments are arranged in one or two rings, such as our single row diamond cup wheel and double row diamond cup wheel. They can be used for beveling, smoothing and shaping. Some cup wheels’ segments are arranged into swirl patterns to cover a larger surface area and then gain a faster grinding, such as our segmented turbo cup wheel. There are also cup wheels of other segment arrangement patterns and segment shapes, for example, our floor grinding disc head, dotted star cup wheel, bow segment cup wheel, etc. They are for their respective grinding uses.

The segment number will greatly influence a diamond cup wheel’s working efficiency and its price. More segments can cover more surface area but lead to a higher price for the cup wheel. You can choose fewer segments for a more economical approach or for larger jobs, and can adopt more segments to increase your working efficiency and then reduce your labor expenses. This lies on your tradeoff.

The segments’ diamond grit is another consideration. Coarse, medium and fine grits should be used for a progressive scratch removal prior to the final polishing with diamond polishing pads.

We have full range of diamond cup wheel products for your choice. They are silver brazed, and are of high quality and at low prices. Welcome to contact us to inquire their prices and/or ask other questions.