Halnn Superhard CBN inserts is widely used in the processing of mill roll holes due to its excellent cutting performance and stability. It can realize large-capacity cutting and interrupted cutting, compared with traditional carbide tool production. The efficiency is doubled and the application of dry cutting results in a significant reduction in production costs.

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Halnn BN-S20 grade CBN inserts for turning mill rolls
The hardness of the roll itself is difficult to process, especially the surface is
accompanied by casting defects such as sand, pores and hard spots, and the
requirements for the cutting tool are extremely high.
Halnn Superhard CBN inserts is widely used in the processing of mill roll holes
due to its excellent cutting performance and stability. It can realize
large-capacity cutting and interrupted cutting, compared with traditional carbide
tool production. The efficiency is doubled and the application of dry cutting
results in a significant reduction in production costs.
(2)Turning High-speed steel rolls: The use of Halnn BN-S20 grade solid CBN
inserts has doubled tool life of a branded CBN inserts.
Halnn BN-S20 grade CBN inserts turning High-speed steel rolls
Roll material：High-speed steel roll(Hardness HSD90)
Tool type：BN-S20 RCMX120700
Cutting parameters：Fr=0.2mm/r，Vc=35m/min
Processing method：Dry cutting
Tool materials Tool life Failure modes
Halnn BN-S20 grade CBN inserts 25 Groove/edge Normal wear
A brand of CBN inserts 12 Groove/edge Collapse damage

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(2) Turning Forging steel cold rolls: Halnn BN-S20 grade CBN inserts is twice
as efficient as traditional carbide tools.
Halnn BN-S20 grade CBN inserts machining Forging steel cold rolls
Roll material：Forging steel cold roll，Hardness HRC60
Tool type：BN-S20
Cutting parameters：Fr=0.5mm/r，Vc=66m/min，ap=2mm
Processing method：Dry cutting
Tool materials Efficiency
Halnn BN-S20 grade CBN inserts 2times
A brand of traditional carbide tool /
(3) Thread roll repair: Halnn solid CBN inserts is 5 times more efficient than
traditional carbide tools.
Halnn HLCBN grade CBN inserts turning Tungsten carbide rolls
Roll material：Tungsten carbide roll，Hardness HRC84.5-85
Tool type：HLCBN
Cutting parameters：Fr=1.02mm/r，Vc=25m/min，ap=0.6mm
Processing method：Dry cutting
Tool materials Efficiency
Halnn BN-K1 grade CBN inserts 5times
A brand of traditional carbide tool /