Halnn Superhard CBN tools are mainly used for machining parts with high hardness and difficult processing rolls, such as rebar rolls, wire rolls, sheet rolls, etc. According to the material of the roll, hardness and processing conditions, Halnn solid CBN tool is recommended. In the metallurgical steel industry, the most difficult to process is high-speed steel rolls（HSS）, Halnn has more than 60% of the global CBN tool market share, and has good customer reputation and brand value in the overseas roll industry, especially in high-speed steel rolls and hard alloys rolls, high-alloy high-hardness cast iron roll and its repair processing, with rich CBN tool manufacture experience, the following are Halnn CBN tools solutions for rolls industry:

High carbon semi-steel

Halnn CBN tools drawing for machining Rolls

 (1) Machining High Nickel-Chromium alloy cast iron roll: Halnn BN-K1grade solid CBN tool can be used for large-capacity cutting to  improve production efficiency, 
 
 while cutting performance is stable and cost-effective.
 

Halnn BN-K1 grade CBN tool machining High Nickel-Chromium cast iron Rolls
	Roll material：High Nickel-Chromium cast iron roll (HSD80) Tool type：BN-K1 RNMN200800 Cutting parameters：ap=4mm，Fr=0.7mm/r，Vc=45m/min Processing method：Dry cutting
Tool materials	Cutting speed	Tool life	Failure modes
Halnn BN-K1 grade CBN tool	45m/min	3pcs	Normal wear
A brand of CBN tool	35m/min	2pc	Collapse damage

 (2) Machining High-speed steel roll: Halnn BN-S20 grade CBN tool can be used for machining High-speed steel roll with double the efficiency.

Halnn BN-S20 grade CBN tool machining High-speed steel roll
	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 tool	25 Groove/edge	Normal wear
A brand of CBN tool	12 Groove/edge	Collapse damage

(3) Machining Infinite chilled cast iron roll: Halnn BN-S20 grade CBN tool is twice as efficient as traditional cutting tools and the tool life is increased by 3 times.

Halnn BN-K1 grade CBN tool machining Infinite chilled cast iron roll
	Roll material：Infinite chilled cast iron roll ,Hardness HSD67 Tool type：BN-K1 Cutting parameters：Fr=0.5mm/r，Vc=66m/min，ap=2mm Processing method：Dry cutting
Tool materials	Efficiency	Tool life
Halnn BN-K1grade CBN tool	2 times	3 times
A brand of traditional carbide tool	/	/

(4) Machining Forging steel cold roll: Halnn BN-S20 grade CBN tool is twice as efficient as traditional carbide tools.

Halnn BN-S20 grade CBN tool machining Forging steel cold roll
	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 tool	2times
A brand of traditional carbide tool	/

(5) Thread roll repair: Halnn CBN tool is 5 times more efficient than traditional carbide tools.

Halnn HLCBN grade CBN tool machining Tungsten carbide roll
	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 tool	5times
A brand of traditional carbide tool	/

(6) Machining Carbide roll: The service life of the Halnn CBN tool is higher than that of an imported CBN tool by 4 times.

Halnn HLCBN grade CBN tool machining Carbide roll
	Roll material：Carbide roll，Hardness HRC84.5-85 Tool type：HLCBN RNMN120400 Cutting parameters：Fr=1.02mm/r，Vc=25m/min，ap=0.6mm Processing method：Dry cutting
Tool materials	Tool life	Failure modes
Halnn HLCBN grade CBN tool	4times	Normal wear
an imported CBN tool	/	Collapse damage