CBN Insert-the right choice for hard turning bearings
Category：News
PublishedDate：2017-10-16
CBN Tools, the hardness is only second to Diamond Tools, and have excellent wear resistance and impact resistance, is the right cutting tools for hard turning bearings.
Bearings, as one of the most important component in modern machine tools, often use heat treatment method to improve the tools performance, in order to obtain good usage life. However, the hardness of bearings often reach HRC60, it is difficult to machine even for finishing process with small working allowance.
In early times, the manufacturers use grinding process to make sure the dimension requirements and the precision requirements. With the development of the modern technology, grinding process can't satisfy the requirements of high efficiency and low production costs. So the manufacturers are searching other methods to improve the efficiency.
The appearance of cbn insert makes it possible with turning instead of grinding. CBN Insert is researched by high hardness materials, it not only has high hardness, but also has strong impact resistance, is the right cutting tools for machining bearings.
The main process of machining bearing is finishing process, and most dimension size is large, the size will easily change after heat treatment, so the working allowance is large. For example, when machining the wind power bearings, the allowance will be more than 0.3mm, and some process will exist interrupt turning condition. So we need pay more attention on the cbn grade and brand when choose cutting tools for machining bearings.
CBN Tools can be divided into 3 types: solid cbn insert, pcbn inserts and brazing pcbn inserts. For the process that allowance is smaller than 0,5mm, we can choose pcbn inserts and brazing pcbn insert. For the process that allowance is larger than 0.5mm, we can choose solid cbn inserts.
For example, Halnn Superhard BN-S20 solid cbn insert finish turning bearings, the performance is about 8 times of ceramic insert, and the roughness can be ensure within Ra0.8. The efficiency is improved, and the tools costs become lower.
Halnn cbn inserts realize high speed cutting, turning bearing instead of grinding, is the right choice for machining bearings. If you would like to know more details, please feel free to contact with us info@halnntools.com, skype:info@halnntools.com.