JCB JLD series of Large single crystal diamond refer to diamonds with a diameter greater than 1.0mm, generated under rigorous high temperature and high pressure conditions. The product has a hexoctahedral crystal structure, high purity, good transparency, and consistent orientation. It possesses high static pressure strength, impact toughness, thermal stability, and wear resistance. The JCB JLD series of large grain single crystal diamonds are widely used in the manufacturing of single crystal dressing pens, diamond rollers, grinding wheel dressing tools, gem processing tools, precious metal processing tools, optical material processing tools, and single crystal drawing dies, among other precision machining tools. They are extensively applied in high-tech fields such as aerospace, optical materials, jewelry processing, watches, instruments manufacturing, optical fiber cables, and infrared technology.
| JLD91/90 Features: Regular crystal shape, complete hexahedral or octahedral structure, almost free from impurities. Purpose: Mainly used for producing diamond single crystal wire drawing dies. |
| JLD80 Features: Regular crystal shape, complete hexahedral or octahedral structure, few impurities. Purpose: Mainly used for producing diamond single crystal cutting tools and diamond single crystal dressing tools. |
| JLD60 Features: Regular crystal shape, almost complete hexahedral or octahedral structure, few impurities. Purpose: Mainly used for producing diamond single crystal cutting tools and diamond single crystal dressing tools. |
| JLD40 Features: Regular crystal shape, hexahedral or octahedral structure, higher impurity content compared to JLD60. Purpose: Mainly used for producing diamond single crystal dressing tools and diamond rollers. |
| JLD20 Features: Relatively regular crystal shape, higher impurity content compared to JLD40. Purpose: Mainly used for producing diamond rollers and diamond coarse grinding tools. |
| JLD10 Features: Irregular crystal shape, higher impurity content compared to JLD20. Purpose: Mainly used for producing diamond coarse grinding tools. |
Product Number Diameter, MM | JLD10 | JLD20 | JLD40 | JLD60 | JLD80 | JLD90 | JLD91 |
| 1.0(18/20) | Y | Y | Y | Y | Y | Y | |
| 1.2(16/18) | Y | Y | Y | Y | Y | Y | |
| 1.4(14/16) | Y | Y | Y | Y | Y | Y | Y |
| 1.6(12/14) | Y | Y | Y | Y | Y | Y | Y |
| 1.8(10/12) | Y | Y | Y | Y | Y | Y | Y |
| 2.0 | Y | Y | Y | Y | Y | Y | Y |
| 2.2 | Y | Y | Y | Y | Y | Y | Y |
| 2.4 | Y | Y | Y | Y | Y | Y | Y |
| 2.6 | Y | Y | Y | Y | Y | Y | Y |
| 2.8 | Y | Y | Y | Y | Y | Y | Y |
| 3.0 | Y | Y | Y | Y | Y | Y | Y |
| 3.2 | Y | Y | Y | Y | Y | Y | Y |
| 3.4 | Y | Y | Y | Y | Y | Y | Y |
| 3.6 | Y | Y | Y | Y | Y | Y | Y |
| 3.8 | Y | Y | Y | Y | Y | Y | Y |
| 4.0 | Y | Y | Y | Y | Y | Y | Y |
| 4.2 | Y | Y | Y | Y | Y | Y | Y |
| 4.5 | Y | Y | Y | Y | Y | Y | Y |
| 5.0 | Y | Y | Y | Y | Y | Y | Y |
| 6.0 | Y | Y | Y | Y | Y | Y | Y |
