The document discusses CBN insert grades for hard turning of bearing components. It provides information on 6 CBN insert grades for machining various hardened steel and superalloy materials. For each grade it lists the recommended hardness range, machining type, materials, and cutting conditions for operations like roughing, semi-finishing and fine finishing of bearings. Common bearing materials include chromium and chromium-molybdenum steels. Information is also provided on tool holders and inserts suitable for specific bearing geometries and processes.

1. www.halnncbn.com
Hard
Turning
Bearing

2. BN-H10
BN-H21
BN-H20
BN-H11
BN-S20
BN-S200

3. CBN Grade for Hard Turning Bearing
Insert Grade
Machining
Hardness
Processing Condition Machining Materials Machining Type
BN-S20 HRC45~68
Roughing
Semi-Finishing
Hardened Steel
Interrupt Cutting
Contiunous Cutting
BN-S200 HRC45~68
Semi-Finishing
Fine Finishing
Hardened Steel,
Superalloy
Continuous Cutting
BN-H21 HRC62~68 Fine Finishing Hardened Steel
Heavy Interrupt Turning
Continuous Cutting
BN-H10 HRC45~68 Fine Finisihing
Hardened Steel
High Strength Cast Iron
Continuous Cutting
BN-H20 HRC45~63 Fine Finishing Hardened Steel
Interrupt Cutting
Continuous Cutting
BN-H11 HRC45~63 Fine Finishing Hardened Steel Continuous Cutting

4. Bearing Common Materials
1. Cr9 (100C5/105Cr4/51100)
2. Cr15 (100C6/100Cr6/52100)
3. 42CrMo (4140/42CD4/42CrMo4)
For Bearings in different industries, they will
be different materials, which include
Cr9,Cr15,42CrMo, ect. Halnn already research
cbn grades (BN-H20,BN-H11,BN-H10 and BN-
H11) for these materials, and also can be used
for different process: Roughing, Finishing and
Interrupt turning).
35%
Wind Power
Bearing
Automotive
Bearing
Bearing
Ring
Metallurgical
Bearing
Compressor
Bearing

5. Roughing Bearing Surface
Tool Holder:CSDNN
Insert Model: BN-S20 SNMN150716/SNGN120712
Machining Surface Shoulder
Tool Holder:CCLNR/L 90°
Insert Model: BN-S20 CNGN120412/CNGN120408
Machining Channel parts
Tool Holder: CRDNN
Insert Model: BN-S20 RNGN120400/RNGN090300
Machining Channel Part
Tool Holder: CRDNN
Insert Model: BN-S20 RCGX120700/RCGX090700
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2
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6. 1
2
BN-S20 BN-S20

7. When turning instead of gringding,
Total Working allowance is above 1mm, we recommend BN-S20 CNGN120408,
It also suit for turning Bearing Ring with small large allowance.
1
2

8. 1
2 BN-S20

9. Cutting Data for Hard Turning Bearing
Insert Grade Machining Type
Cutting Speed
(Vc)
Cutting Depth
(ap)
Feed Rate
(Fr)
BN-S20
Interrupt Cutting
Continuous Vutting
50~200
60~250
0.5~10
<1
0.15~1.0
0.05~0.35
BN-S200 Continuous Cutting
50~200
60~250
1~10
<1
0.15~1.0
0.05~0.35
BN-H21
Heavy Interrupt Turning
Continuous Cutting
60~250 <0.5 0.05~0.35
BN-H10 Continuous Cutting 60~250 <1 0.05~0.35
BN-H20
Interrupt Cutting
Continuous Cutting
60~180 <1 0.05~0.35
BN-H11 Continuous Cutting 90~200 <1 0.05~0.35

10. Web:www.halnncbn.com
Email:halnntools@gmail.com
WhatsApp:+8618695866134
Skype:cbn_inserts_angels
WhatsApp: +8618695866134
Contact Us

11. Thanks !