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Turning bearings instead of grinding with BN-S200 solid cbn insert from Halnn Superhard
Bearings can be seen anywhere in nowadays, and the bearings are often working in bad environment, especially for the wind power industry, it needs obey large cutting force, so cutting tools materials only can use bearing steel with high strength, the normal grade has GCr15(E52100,100Cr6 or SUJ2)
Bearings often use heat treatment to obtain high hardness, and obtain many performance requirements, and the hardness after heat treatment will be above HRC45, some will be above HRC62. And for large scale bearings, grinding is already difficult, it will be more difficult to machine with turning process. It will require higher on the cutting tools.
Specific for high hardness bearings after heat treatment, we can choose ceramic cutters and pcbn inserts. Ceramic cutters are well known, and we can decide whether to choose ceramic cutters as the working allowance. For example, you’d better not choose ceramic cutters when allowance is larger than 1mm, ceramic cutters only suit for the working condition with small allowance and continuous process.
The application case for machining bearings with cbn insert
(1) Finish turning slew bearings raceway, end surface, the hardness is about HRC47~55, the allowance is less than 2mm, we can choose Halnn non-metal adhesive BN-S200 solid cbn insert, the cutting parameters as follows: ap≤1mm，Fr=0.05-0.35mm/r，Vc=60-250m/min, machining effect: The tool life will be 7 times of ceramic cutters, and the roughness can be controlled within Ra0.6~1.0mm.
(2) Finish turning the Cylindrical,endsurface, the hardness is HRC47~55, the allowance will be above 2mm, we recommend Halnn BN-S20 solid cbn insert, the cutting data: ap=1mm，Vc=140-180m/min, the processing efficiency: the tool life is longer and the roughness can reach Ra0.4.
(3) Finish turning the cylindrical and the inner bore, the hardness will be about HRC62, we choose Halnn BN-H11 pcbn insert, the cutting data: ap≤1mm，Fr=0.05-0.35mm/r，Vc=60-250m/min, machining effect: the roughness can be controlled within Ra0.8
For hard turning bearings, we need to choose the cutting tools depending on the bearings hardness, allowance, working condition. Specific for different machining part, we need to choose the right cbn grade, so when you meet any problems on machining bearings, please feel free to contact with us halnntools@gmail.com, Whatsapp:+8618695866134, Wechat: halnntools.
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Email:halnntools@gmail.com
Skype:cbn_inserts_angels
Wechat:Halnntools
Whatsapp:+8618695866134
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