My Videos

As the advancement of technology advancements, it will require higher on the precision of large scale bearings. The tolerance grade also reach P4 and P5. Large bearings are usually manufactured using CNC Lathes as well as Grinding Tools. Because of the limitations of grinding, efficiency and cost are very low. Utilizing the research and development of superhard cutting instruments solid cbn insert In many cold processes, turning could replace grinding. This article will describe the process of hard turning rings for bearings, and the surface roughness will reach Ra0.4~0.8 and meet the requirements of the bearing. The characters of cbn inserts for hard turning bearings CBN Insert is among the most efficient materials used to machine ferrous metals. It has high hardness, wear resistance, and it is second in importance to diamond tools. CBN Insert is capable of cutting materials that have high hardness. CBN Insert has high stable performance and high temperature red hardness If the cutting temperature is very high, the materials are able to soften, which is a benefit for the cutting process. CBN Insert is very antioxidant and will not react with iron at temperatures over 1200-1300?. However, it is able to undergo hydrolysis at 1000?. When using pcbn turning inserts, machining bearings, it is essential to use dry cutting methods. CBN Insert has low Co-efficient of friction. It will not easily make the chipping layer and it can enhance the surface quality of the piece. CBN materials used for bearings with hard turning The allowance for machining large scale bearing is large, we usually use the solid cbn insert to minimize the cutting process and increase the effectiveness. The BN-S20 Solid CBN Insert is among the most widely utilized cbn components. BN-S20 is a part of solid cbn inserts manufacturers, the hardness is about HRC95~1000, and uses ceramic as the binder, that will ensure superior wear resistance and the highest chemical resistance at high temperatures. For example grinding wind power bearings of dimensions of 1900mm in diameter and 130mm in thickness If you use a grinding process grinding takes around 18 hours. when turning is used instead of grinding process the time is only 4.5h. The roughness can reach Ra0.3um. Turning has a processing efficiency about four times higher than grinding. The cost of all this is only have 20% percent. Advantages of cbn inserts with hard-turning bearings (1) Efficiency increased by several times (2) It can be used for bulk orders, and is durable. (3) Lower pollution: The chips can be easily reclyed, as opposed to grinding. And turning process don't need cutting fluid. Conclusion If we utilize cutting tools cbn that are hard turning, using CNC Lathe, it will have an excellent working efficiency and will reduce the costs of the tool. As the industry develops increasing number of manufacturers of bearings use cbn inserts in place of grinding.