Halnn Superhard provides hard turning, hard milling, profiling, grooving, threading and other CBN tools for the hardened steel field, and has formed a set of hard cutting tools from continuous to intermittent, from roughing to super-finishing The scheme is for users to choose. It has rich hard cutting experience in the fields of gears/gear shafts, synchronizers, bearings, screws, molds, etc. The following are some cases of Halnn Superhard CBN tools for hard cutting hardened steel:

    （1）Continuous cutting conditions: BN-H05 and BN-H11 materials are recommended to achieve high-speed cutting. Compared with a brand CBN insert, the life is increased by 45%, and coated CBN inserts are also available.

	Workpiece Material：20CrMnTi（hardness HRC58-62）    Selected Insert：BN-H05 CNGA120408    Cutting Parameters：Vc=180m/min，Fr=0.1mm/r，ap=0.1mm   Processing Methods：Dry Cutting
Tool Material	Surface Roughness	Tool Life
Halnn BN-H05	≤Ra0.8	800pcs
Other Brand CBN	Ra1.0	550pcs

    （2）Medium intermittent cutting conditions: BN-H10 and BN-H20 materials are recommended. It can withstand the impact of the keyway during hard turning. At the same time, whether it can be stabilized by turning instead of grinding. It is affected by the machine tool used in the hard turning process. It is important to confirm, especially when there is intermittent processing.

	Workpiece Material：20CrMnTi（hardness HRC58-62）    Selected Insert：BN-H10 CCGW09T304    Cutting Parameters：Vc=135m/min，Fr=0.08mm/r，ap=0.25mm   Processing Methods：Dry Cutting
Tool Material	Cutting Speed	Tool Life	Eeffectiveness
Halnn BN-H10	135m/min	1000pcs	improve 22%
Other Brand CBN	110m/min	600pcs	----

    （3）Strong intermittent cutting conditions: the composite CBN blade BN-H21 material is recommended. The gear with a group of holes on the end of the hard car has a high cost performance, stable cutting performance, and advantages over imported tools;

	Workpiece Material：20CrMnTi（hardness HRC58-62）    Selected Insert：BN-H21 WNGA080404    Cutting Parameters：Vc=117m/min，Fr=0.1mm/r，ap=0.15mm   Processing Methods：Dry Cutting
Tool Material	Tool Life	Final Failure Form
Halnn BN-H21	600pcs	normal abrasion
Other Brand CBN	100pcs	Breakage

    （4）Heavy-duty cutting conditions: select the solid polycrystalline CBN blade BN-S20 grade, which can withstand tooth surface impact during hard turning, stable cutting performance, and high cost performance.

Workpiece Hardness：HRC60    Selected Insert：BN-S20  SNMN120712    Cutting Parameters：Vc=90m/min，Fr=0.12mm/r，ap=2.5mm   Processing Methods：Dry Cutting

    （1）After hot turning, the inner ring and outer ring of the wind power bearing are hard-turned, and the integral polycrystalline CBN blade is used. The tool life is more stable than a certain brand of CBN tool, the cost performance is high, and the surface quality is higher.    

    （2）Wind power bearing raceway processing, commonly used solid polycrystalline CBN blade model RCGX090700; RNMN090300, the production efficiency is significantly improved, and the surface finish can reach Ra0.4.

	Workpiece Name：Wind Power Bearing Rib    Workpiece Material：42CrMo4（hardness HRC58-63）    Selected Insert：BN-H200 RNMN090300   Cutting Parameters：Vc=190m/min，Fr=0.32mm/r，ap=0.6-0.7mm    Processing Method: Dry Cutting
Tool Material	Tool Life	Final Failure Form
Halnn BN-H200	1 pcs/tip	normal abrasion
Other Brand CBN	＜1 pcs/tip	Breakage

	Workpiece Name：Wind Power Bearing Raceway    Workpiece Material：42CrMo4（hardness HRC58-63）    Selected Insert：BN-H200 RNMN090300   Cutting Parameters：Vc=260m/min，Fr=0.2mm/r，ap=0.1mm    Processing Method: Dry cutting
Tool Material	Surface Roughness	Final Failure Form
Halnn BN-H200	Ra0.4	normal abrasion
Other Brand CBN	Ra0.4	Breakage

    （1）The grooving process adopts the forming grooving tools to increase the production cycle and improve the efficiency.    

    （2）The grooving process adopts CBN stanard inserts, which has stable cutting performance and high cost performance.

	Workpiece Material：Gear Steel（hardness HRC58-63）    Selected Insert：BN-H10    Cutting Parameters：Vc=170m/min，Fr=0.1mm/r   Processing Methods：Dry Cutting
Tool Material	Cutting Speed	Tool Life	Final Failure Form
Halnn BN-H10	170m/min	350pcs	normal abrasion
Other Brand Ceramic inserts	120m/min	70pcs	Breakage

    （1）Hard turning head (rolling screw), commonly used blade model: BN-S20 CNMN120708/04, improve processing technology, increase production efficiency.

	Workpiece Material：GCr15（hardness HRC60-62）    Selected Insert：BN-S20 CNGN120708    Cutting Parameters：ap=4.5mm，Fr=0.10mm/r，Vc=95m/min   Processing Methods：Dry Cutting
Tool Material	Cutting Speed	Cutting Depth	Final Failure Form
Halnn BN-S20	95m/min	4.5mm	normal abrasion
Other Brand Ceramic Inserts	65m/min	0.5mm	Breakage

       （2）Turning: The use of PCBN inserts, compared with a brand of CBN inserts, tool life is increased by 4 times, and is normal wear.

	Workpiece Material：Powder high speed steel（hardness HRC65）    Selected Insert：BN-H21  CNGA120408    Cutting Parameters：Vc=35-60m/min，Fr=0.1mm/r，ap=0.15mm   Processing Methods：Wet Cutting
Tool Material	Tool Life（pcs/tip）	Final Failure Form
Halnn BN-H21	5	normal abrasion
Other Brand CBN	＜1	Breakage

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