Halnn CBN insert used for hard turning the wind power bearing

Wind Power bearings,also named slewing bearing. Because of the bad environment and the high processing costs ,the manufacturers usually use the 42CrMo with excellent performance for the main materials, it also be called 42CrMo bearings.

Wind Power Bearing belongs to forging moulding. In order to improve the lifetime of the wind power bearings,the manufacturers usually use heat treatment process to improve the usage performance after rough machining.The hardness of the wind power bearing after heat treatment usually is above HRC45.

The inserts which used for finish turning wind power bearings must have high hardness, wear resistance and impact resistance.Halnn Superhard researched cbn insert can satisfy all the requirements. Specific to the different hardness and the deformation of the wind power bearing after heat treatment,Halnn has different grades cbn inserts to satisfy the manufacturers.

For example, Finish turning wind power bearing ,the working allowance is less than 2mm,Halnn choose BN-S200 solid cbn inserts hard turning the raceway and the end surface of the wind power bearings. The cutting parameters as follows: Vc=110m/min, Fr=0.45m/r,ap=0.5mm,The insert grade is RCGX090700,the precision can arrive Ra0.8. The working efficiency as follows:

Compared with Ceramic insert ,The lifetime of the insert will be 7 times of ceramic insert when the same cutting speed is higher than ceramic insert .And the surface roughness is higher than ceramic insert .

Compared with Ceramic insert ,The lifetime of the insert will be 7 times of ceramic insert when the same cutting speed is higher than cermet insert .And the surface roughness is higher than cermet insert .

When hard turning the wind power bearing with working allowance above 2mm,the bearings manufacturer will choose Halnn Superhard BN-S20 CBN inserts ,When machining the channel part of the wind power bearing ,we can choose CNC Lathe for rough machining speed Vc=100~150m/min,the cutting speed ap=1~4mm, finish turning speed Vc=140~180m/min ,and the roughness can arrive Ra0.4.

Halnn Superhard Bn-S20 solid cbn insert hard turning all the parts of the wind power bearings :

When turning the cylinder of the wind power bearings, Halnn recommend you SNGN120712 CBN inserts;

When turning the end surface of wind power bearings, Halnn recommend you CNGN120412,CNGN120408 cbn inserts;

When turning the surface shoulder of the wind power bearings ,Halnn recommend you CNGN120412,CNGN120408 CBN inserts ;

When turning the channel part of the wind power bearings ,Halnn recommend you RNGN120400 and RNGM090300 CBN inserts.

Halnn superhard has researched new cbn inserts materials BN-S20 CBN Inserts to satisfy the manufacturers ,and if you have any problems on Bn-S20 CBN insert ,please feel free to contact with us halnntools@gmail.com ,skype:cbn_inserts_angels ,whatsapp:+8618695866134 ,Wechat:Halnntools.