The cutting Parameters and application case of Halnn Superhard CBN Cutting Tools hard turning bearing steel

Because of the high hardness of the bearing steel after heat treatment ,many cutting tools such as carbide cutting tools ,ceramic cutting tools and traditional cbn cutting tools can not performance well on hard turning bearing steel .Even though ceramic cutting tools and traditional cbn cutting tools can be used for finishing process, they also can not used for interrupted turning and large working allowance machining .

Halnn superhard researched new non-metal adhesive cbn cutting tools BN-S20 grade through continuous effort which break the myth of the cubic boron nitride blade can not be used for strong interrupted turning and large working allowance turning hardened steel, BN-S20 CBN Cutting Tools is a worldwide breakthrough in cutting tools industry.

Halnn BN-S20 not only make sure the hardness and the wear resistance of the traditional CBN Cutting Tools,but also improve the impact toughness ,fracture resistance and shock resistance.

The following will show you the cutting parameters of Halnn BN-S20 hard turning bearing steel :

Machining Materials Recommend Cutting Parameters and CBN Cutting Tools grade

Cutting Speed Vc(m/min) Cutting Depth ap(mm) Feed Rate(mm/r) Common CBN Cutting Tools Grade

Bearing Steel (Above HRC45) 60~250 ≤1 0.05-0.35 BN-S20,BN-S200,BN-H11

Because the characters of the bearing steel part will be easily change, we will have different insert grade specific to different working allowance for turning large bearing steel after heat treatment .

(1)When the working allowance is above 2mm, we will choose Halnn BN-S20 CBN Cutting Tools ,which belongs to non-metal adhesive solid cbn cutting tools .As the following figure:

(2) When the working allowance is less than 2mm,we will choose Halnn BN-S200 and BN-H11 CBN Cutting Tools (as following figure) , BN-S200 belongs to solid CBN Cutting Tools ,mainly used for finishing process,BN-H11 belongs to welded CBN Cutting Tools. Both the two cutting tools cutting depth can be controlled within 0.5mm. It will have best effect.

Now we will share you 2 application case that Halnn CBN Cutting Tools hard turning bearing steel part :

(1) The application case of BN-S200 machining slewing bearings : 

Finish turning slewing bearing raceway and the surface

Hardness:HRC47~55,Cutting Parameters: ap=0.5mm,Fr=0.45mm/r,Vc=110m/min

Processing effect: The lifetime will be more than 7 times than ceramic cutting tools ,and the surface roughness can be controlled within Ra0.6~1.0.

(2) The application case of Halnn BN-H11 CBN Cutting Tools machining Metallurgical bearings:

Finish turning the cylinder and inner bore of the Metallurgical bearings

Hardness:HRC62

Cutting Parameters: ap=0.5mm,Fr=0.12mm/r,Vc=140m/min

Processing effect: Compared imported PCBN Cutting Tools ,it haslonger lifetime, the surface roughness will be within Ra0.8.

More related turning bearing steel ,please check http://www.halnntools.com/news/know/257.html ,Other information on products ,please feel free to contact with us halnntools@gmail.com ,skype:cbn_inserts_angels ,whatsapp:+8618695866134,Wechat:Halnntools.