The JCB JBD series of resin bond synthetic diamond is a type of polycrystalline diamond widely used in the production of resin bond diamond grinding wheels. The JCB JBD series of polycrystalline diamond consists of multiple sub-crystals with an embedded structure, featuring irregular crystal shapes, rough surfaces, excellent brittleness, and superior self-sharpening properties. Its high grinding efficiency, long service life, and superior surface finish provide exceptional performance for grinding various non-ferrous materials such as tungsten carbide, silicon nitride, aluminum oxide, silicon carbide, optical glass, glass, and ceramics.
 | JBD4(AC4) Characteristics: It is the most brittle and least strong polycrystal among resin-bonded diamonds, with a dark gray color, excellent self-sharpening properties. Its micro-fracturing capability enables outstanding grinding performance under low load grinding. Applications: Suitable for low load resin-bonded grinding tools, used in precision machining of cemented carbides, optical glass, and ultra-high-quality fine grinding applications. |
 | JBD6(AC6) Features: A polycrystalline diamond with moderate brittleness and strength in resin bond diamonds, gray-green in color, with good self-sharpening properties. It is an ideal choice for balancing grinding performance and tool life. Applications: Suitable for medium-load resin bond grinding tools, used for rough and semi-finish machining of hard alloys, optical glass, and other brittle non-metallic materials. |
 | JRD Features: The highest-strength irregular single crystal diamond in resin bond diamonds, yellow-green in color, with a rough and sharp surface. Applications: Suitable for heavy-load resin bond grinding tools, used for processing brittle materials such as gemstones, stone, ceramic tiles, glass, and rough machining of hard alloys. It is an economical resin diamond with high grinding efficiency |
| Grain Size Grade | 50/60 | 60/70 | 70/80 | 80/100 | 100/120 | 120/140 | 140/170 |
| JBD4(AC4) | Y | Y | Y | Y | Y | Y | Y |
| JBD6(AC6) | Y | Y | Y | Y | Y | Y | Y |
| JRD | Y | Y | Y | Y | Y | Y | Y |
| Grain Size Grade | 170/200 | 200/230 | 230/270 | 270/325 | 325/400 | 400/500 | 500/600 |
| JBD4(AC4) | Y | Y | Y | Y | Y | Y | Y |
| JBD6(AC6) | Y | Y | Y | Y | Y | Y | Y |
| JRD | Y | Y | Y | Y | Y | Y | Y |
| JCB GB/T 6406-1995 | USA ANSI US Mesh # | European Community FEPA D | International Standard ISO | Russia GOST 9206-80 |
| 50/60 | 50/60 | D301 | 300/250 | 315/250 |
| 60/70 | 60/70 | D251 | 250/212 | 250/200 |
| 70/80 | 70/80 | D213 | 212/180 | |
| 80/100 | 80/100 | D181 | 180/150 | 200/160 |
| 100/120 | 100/120 | D151 | 150/125 | 160/125 |
| 120/140 | 120/140 | D126 | 125/106 | 125/100 |
| 140/170 | 140/170 | D107 | 106/90 | 100/80 |
| 170/200 | 170/200 | D91 | 90/75 | |
| 200/230 | 200/230 | D76 | 75/63 | 80/63 |
| 230/270 | 230/270 | D64 | 63/53 | 63/50 |
| 270/325 | 270/325 | D54 | 53/45 | 50/40 |
| 325/400 | 325/400 | D46 | 45/38 | 45/38 |
| 400/500 | 400/500 | D39 | 38/32 | 38/30 |
| 500/600 | 500/600 | D33 | 32/26 | 30/20 |
