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CBN Inserts
SUNDI is a professional CBN inserts manufacturer, providing high-precision solutions for hardened steel and other demanding applications.
Cubic Boron Nitride Inserts Overview
What is a CBN(PCBN) Insert?
A CBN Insert, also called PCBN insert, is a cutting tool made of polycrystalline cubic boron nitride, whose hardness is second only to diamond, ultra-hard and heat-resistant, ideal for machining hardened steels, cast iron, powdered metal,and superalloys with high precision and durability.
CBN (PCBN) Overview
CBN (PCBN) is a material with a hardness second only to synthetic diamonds. It is produced through the transformation of a catalyst under high temperature and pressure conditions. CBN (PCBN) is a type of inorganic super-hard material and boasts high hardness, chemical inertness, and thermal stability at high temperatures.
Advantages Of Using CBN Inserts
CBN inserts deliver exceptional hardness and superior wear resistance, which ensures extremely slow tool wear and extended tool life during the machining of quenched steels, chilled cast iron, and other materials containing hard carbides or martensite. Thanks to outstanding thermal stability, the cutting edge remains sharp and reliable even under high cutting temperatures, consistently guaranteeing precision. And unlike PCD inserts, CBN exhibits very low chemical affinity with ferrous elements (Fe, Ni, Co), establishing it as the ideal solution for machining ferrous metals.
When it comes to machining ferrous materials and superalloys (Ni-base, Co-base), CBN inserts are an excellent choice, especially for the following applications:
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Hardened steels
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Alloy steels
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Carbon tool steels
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Die steels
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High speed steels
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Forged steels
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Chilled cast iron
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Nodular and grey iron
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White and chrome iron
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Meehanite iron
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Ferrous powder metals
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Valve seat rings
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Superalloys: Ni-base, Co-base
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And more
Indexable CBN (PCBN) inserts for Diverse Machining Needs
We offer a variety of indexable CBN/PCBN inserts. You can provide the tool model based on the ISO designation key, and we will manufacture the appropriate inserts to match the tool’s application and material performance. These indexable inserts are commonly used for turning, boring, grooving, milling, threading, and as part of a replaceable tooling system.
Full Edge CBN Turning Inserts
Custom CBN Turning Inserts
CBN Milling Inserts
CBN Grooving Inserts
CBN Threading Inserts
User Case CBN (PCBN) Inserts
CBN Inserts for Turning Hardened Steel
1.7 x
50 x
- Hardened Steel, 57–62 HRC
Working Material
- 100 m/min
Cutting Speed (V)
- 0.1 mm/rev
Feed (f)
- 0.15 mm
Cutting Depth (d)
Performance
- Over 500 pcs per insert set
- Better dimensional accuracy
- Superior surface roughness control
CBN Inserts for Turning half shaft
1.5 x
53 x
- HRC55–60 (20CrNiMoH)
Working Material
- 170 m/min
Cutting Speed (V)
- 0.22 mm/rev
Feed (f)
- 0.1 mm
Cutting Depth (d)
Performance
Tooling life increased 15% over competitors at the same parameter
Greatly reduced the user’s cost
Why choose SUNDI as your CBN (PCBN) inserts manufacturer
Our CBN/PCBN turning inserts are engineered for longer tool life and uniform surface finish, as well as exceptional dimensional control. As a result, component costs can be reduced, leading to higher productivity and cost savings in the overall manufacturing process.
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Cost Reduction
Longer tool life reduces machining cost and improves efficiency.
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High-Quality Materials
UK E6 CBN raw materials ensure hardness and stability.
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Experienced Team
Skilled engineers and workers guarantee reliable performance.
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Advanced Equipment
Peripheral grinders, laser cutting, vacuum brazing ensure precision.
The cBN Material Behavior
E6 CBN deliver strength, stability, and superior performance.
DCN450
Approximately 45% CBN
Sub-μm CBN grain size
DCC500
Approximately 50% CBN
1.5 μm average grain
size
DCX650
Approximately 65% CBN
Average 3 μm
proprietary multi-modal
grain size
DBW85
Approximately 85% CBN
2 μm average grain size
DBS900
Approximately 90% CBN
2 μm average grain size
| Work Material | Hardness | Cutting Speed(m/min) | Cutting Depth d(mm) | Feed Rate f(mm/rev) | Recommendation |
|---|---|---|---|---|---|
| Hardened Steel | >55HRC | 130~210 | - 0.5 | - 0.5 | DCN450 |
| <56HRC | 100~190 | - 0.5 | 0.3~0.5 | DCC500 | |
| Gray Cast Irons | <55HRC | 600~2500 | 0.2~2.0 | 0.5~5.0 | DBW85 |
| >55HRC | 600~2500 | 0.1~1.0 | 0.1~2.0 | DBS900 / DBW85 | |
| Nodular Cast Iron | - | 150~350 | 0.2~2.0 | 0.1~1.0 | DCC500 / DCX650 |
| White and Chrome Cast Irons | - | 50~80 | 0.2~2.0 | 0.1~0.5 | DBW85/DBS900 |
| 50~100 | 1.0~3.0 | 0.2~2.0 | |||
| Valve Seat Rings | <350HV | 50~180 | 0.1~0.5 | 0.05~0.2 | DBW85 |
| >350HV | 50~180 | 0.1~0.5 | 0.05~0.2 |
frequently asked questions for CBN Insers and catalogs
FAQ
Most frequent questions and answers
This is a common misunderstanding. CBN inserts do not “burn” the steel. Instead, the extreme hardness and thermal stability of CBN allow it to mechanically cut hardened steels at very high temperatures, where carbide tools would fail. There is no burning; it is still a cutting process with controlled wear.
The cbn insert price depends on grade, size, and order quantity. While the price is higher than carbide inserts, the longer tool life and stable performance make them more economical in the long run.
Lead time depends on the product and order volume. Standard items can often be shipped within 3-7 days, while customized inserts may take 10-20 days.
Yes. We work with DHL, FedEx, UPS, and other carriers. Sea or air freight can also be arranged according to customer requirements.
Of course. We provide full support for new buyers, including guidance on quotation, payment, customs, and shipping, so you can purchase without concerns.
We offer complete after-sales support, including product quality tracking, usage guidance, and technical advice. In case of quality issues, we will arrange a return or replacement promptly.
Yes. Our experienced engineers can recommend the right CBN grade and cutting parameters based on your workpiece material, hardness, and machine condition.
CBN is a super-hard material that requires advanced manufacturing technology. Although the unit price is higher, CBN inserts last much longer and reduce downtime, which lowers the overall machining cost.
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