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Brazed PCBN inserts are cutting tools used in machining operations requiring high precision and durability.
Tipped PCBN inserts are a new type of superhard cutting tool made from polycrystalline cubic boron nitride and are optimally suited for high-speed cutting of ferrous metals.
Welded CBN inserts and Tipped PCBN inserts have the advantages of high hardness, good wear resistance, and strong thermal stability when processing hardened steel, which can effectively improve processing efficiency and quality.
Typical components made of hardened steel: gears, bearings, ball screw, transimmission shaft and so on.
For processing hardened steel, SCBN is committed to customizing the most suitable solution for each customer through continuous research and development, and has received unanimous praise from customers.
Commonly processed hardened steel models:
C-series: CNGA-2N, CNGA-4N, CCGW-2N, CCGW-4N
D-series: DNGA-2N, DNGA-4N, DCGW-2N, DCGW-4N
T-series: TNGA-3N, TNGA-6N, TPGW-3N, TPGW-6N, TCGW-3N, TCGW-6N
W-series: WNGA0804-3N, WNGA0804-6N, WNGA0604-2N, WNGA0604-8N
V-series: VNGA-2N, VNGA-4N, VBGW-2N, VBGW-4N, VCGW-2N, VCGW-4N
For the above models, we can provide you with customized coating.
SCBN recommends grades for hardened steel:
SBH130: continuous, light interrupt
SBH170: light interrupt, mid interrupt
SBH190: heavy interrupt
Case1: large shaft parts
| Reference | Type | ** | SCBN TOOLS |
|
| Workpiece Name: Large Shaft | Model | VNGA160408-2N | VNGA160408-2N | |
| Material: hardened steelMaterial: 20CrMnTi | Grade | first-line grade | SBH130 | |
| Hardness: HRC 52-58 | Materials | PCBN | PCBN | |
| Processing Location: OD | Vc(m/min) | 110 | 110 | |
| Processing Method: Turning/Continuous | Fr(mm/rev) | 0.16 | 0.16 | |
| Roughness Requirement: Ra 1.6 | ap(mm) | 0.35 | 0.35 | |
| Machining Allowance: 0.35mm | Lifespan(units) | 1 | 1 | |
| OD machining life (pieces): The life is the same, but the SCBN tool cost is reduced by more than 25%, achieving "quality maintenance and cost reduction" | ||||
Case 2: automobile wheel hub bearings - semi-finishing of ball races and ribs
| Reference | Type | **TOOLS | SCBN TOOLS |
|
| Workpiece: wheel hub bearing | Model | VNGA160408-2N | VNGA160412-2N | |
| Material: hardened steel | Grade | first-line grade | SBH130 | |
| Hardness: HRC 58 ± 2 | Materials | ceramic | PCBN | |
| Processing Location: ballway + Rib | Vc(m/min) | 370 | 370 | |
| Processing Method: continuous semi-finishing | Fr(mm/rev) | 0.15 | 0.15 | |
| Roughness Requirement: Ra 1.6 | ap(mm) | 0.15~0.2 | 0.15 | |
| Machining Allowance: 0.15-0.2mm | Lifespan(units) | 150 | 320 | |
| Ballway + retaining edge processing life (pieces): life increased by 113% | ||||
Case 3：PCBN hard turning of planetary gear inner hole
| Reference | Type | **TOOLS | SCBN TOOLS |
|
| Workpiece Name: planetary pinion | Model | CCGW060204-2N | CCGW060202-2N | |
| Material: hardened steel | Grade | first-line grade | SBH130 | |
| Hardness: HRC 58-62 | Materials | ceramic | PCBN | |
| Processing Location: inner hole | Vc(m/min) | 110 | 110 | |
| Processing Method: continuous finishing | Fr(mm/rev) | 0.05 | 0.05 | |
| Roughness Requirement: Ra 0.6 | ap(mm) | 0.1 | 0.1 | |
| Machining Allowance: 0.1mm | Lifespan(units) | 1500 | 1500 | |
| The tool life is the same, but the tool cost is significantly reduced, meeting the goal of "maintaining quality and reducing costs" | ||||
Case 4：outer ball cage processing case
| Reference | Type | **TOOLS | SCBN TOOLS |
|
| Workpiece Name: Outer Ball Cage | Model | TNGA160416-3B | TNGA160416-3N | |
| Material: hardened steel | Grade | first-line grade | SBH130 | |
| Hardness: HRC 58-62 | Materials | ceramic | PCBN | |
| Processing Area: Inner spherical surface | Vc(m/min) | 160 | 100~110 | |
| Processing Method: Intermittent finishing | Fr(mm/rev) | 0.12 | 0.12 | |
| Roughness Requirement: Ra 0.8 | ap(mm) | 0.15~0.2 | 0.15~0.2 | |
| Machining Allowance: 0.15-0.2mm | Lifespan(units) | 400 | 480 | |
| Inner spherical surface processing life (pieces): life increased by 20% | ||||
Advantages of welded CBN Inserts
1. Higher CBN Content: The thicker CBN layer provides excellent wear resistance, making it suitable for long-term continuous machining of high-hardness hardened steel.
2. Excellent Impact Resistance: The weldeding process creates a strong bond between the CBN particles and the substrate, making it suitable for interrupted cutting or rough machining.
3. Economical: reducing long-term costs.
4. High-Temperature Stability: CBN is resistant to high temperatures and maintains its hardness even at high-speed cutting.
Advantages of Tipped CBN Inserts
1. Higher Hardness and Wear Resistance: Uniformly distributed CBN particles make it suitable for finishing high-hardness hardened steel, achieving surface roughnesses below Ra0.4.
2. Excellent Chemical Stability: The vitrified bond reduces reactivity with ferrous materials, extending tool life.
3. High Edge Precision: Suitable for high-precision machining (e.g., final machining of hardened steel molds and precision bearings).
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