1.  Halnn Tools BN-S20  CBN Tips High speed Machining High speed Machining 42CrMo4 Bearing steel Wind turbine bearing

As an important part of wind power generation, wind power bearings often use heat treatment technology to improve the performance requirements of wind power bearings. The heat-treated wind power bearing has high hardness, and the high-precision wind power bearing often uses grinding as the final processing step.

However, with the rapid development of the manufacturing industry, the competition in the market is intensifying. The adoption of high efficiency and low cost is the process of hard turning (turning grinding by turning) is the processing trend of the wind power bearing industry.

Advantages of hard turning (replacement grinding by turning) wind power bearings:

 (1) High production efficiency;

 (2) Hard turning is a clean production, which reduces the production cost, and the iron scraps turned off are more convenient for recycling;

 (3) It is not necessary to use special machinery for hard turning of wind power bearings, and it can be carried out on existing ordinary lathes or CNC lathes;

(4) Most of the heat generated during the hard turning process is carried away by the chips to obtain a good surface quality.

 

2.Advantages of Halnn Tools CBN Tips High speed Machining High speed Machining 42CrMo4 Bearing steel Wind turbine bearing

The dimensions of wind power bearings after heat treatment are generally 2mm-6mm. Halnn Tools recommends the use of BN-S20 grades, which can be cut off with a large margin. The line speed is controlled at 90-150m/min. The surface roughness of the finished vehicle channel reaches Ra0.3μm. The bottom of the hard turning channel is all <0.005mm.

For example, Halnn Tools BN-S20 brand replaces the inner and outer rings of the variable-speed bearing for the 1.5MW unit with turning. The outer diameter is φ1900mm and the thickness is 130mm. The grinding process is used to grind the wind power bearing for more than 18 hours. BN-S20 grade CBN tool car processing, the same surface finish, the time is only 4.5 hours, the efficiency has increased nearly 4 times.

 

3. CBN Tips Characteristics 

Type	Dimension				Grades
	L(mm)	φI.C(mm)	S(mm)	r(mm)	BN-K1	BN-S20	BN-S200
RCMX060700Y		6.35	7.94		●	●	◎
RCMX090700Y		9.525	7.94		●	●	◎
RCMX120700Y		12.7	7.94		●	●	◎
RCMX151000Y		15.875	10		◎	◎	◎
RCMX191000Y		19.05	10		◎	◎	◎
RCMX201200Y		20	12		◎	◎	◎
RCMX251200Y		25.4	12		◎	◎	◎

 

4. Detailed Data of RCMX CBN Tips

Insert Grade	Machining Hardness	Processing Condition	Machining Materials
BN-S20	HRC45~68	Roughing	Hardened Steel
		Semi-finishing
BN-S200	HRC45~68	Semi-finishing	Hardened Steel, Superalloy
		Fine Finishing
BN-H21	HRC62~68	Fine Finishing	Hardened Steel
BN-H10	HRC45~68	Fine Finishing	Hardened Steel and High Strength Cast Iron
BN-H20	HRC45~63	Fine Finishing	Hardened Steel
BN-H11	HRC45~63	Fine Finishing	Hardened Steel

 

5.Application Case

Machining Site: Raceway and End Surface Materials: 42CrMo4 Hardness: HRC47~55 Insert Model: BN-S200 RCGX120700Y Cutting Data: Vc = 110m/min, Fr=0.45mm/r, ap=0.5mm Processing Type: Dry Cutting
Compared with the ceramic cutters
Insert Materials	Cutting Speed (m/min)	Tool Life	Roughness
Halnn BN-S200	110	8	Ra0.8
Ceramic Cutters	90	1	Ra1.6

6.FAQ

Q1. How is your quality?

A1. We have a very seriously control system. We guarantee the high performance of our products.

Q2.What is the Warranty for your products?

A2. For one year from the date of purchase, If any problem on our side, we will make prompt response, and take the shipping cost and send replacement.

Q3. Do you have different quality for different kind of stone?

A3. Yes, according hardness of stone and stone’s feature, we have different typology respectively.

Q4. If we need technical support, can you offer us?

A4. Yes, we have an experienced team, offering our customers additional benefits with specific advice, by our product managerment staff, engineers and technicians.