Indexable CBN Inserts (Multi-Corner PCBN Tools)
UKing Diamond’s factory-direct indexable CBN inserts combine a full PCBN layer with a carbide substrate through HPHT sintering, delivering up to 8 usable cutting edges per insert, superior fracture toughness, and exceptional tool economy for high-feed roughing and heavy-duty machining of hardened steel and cast iron.
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Description
Uking Diamond’s Indexable CBN Inserts represent the high-performance evolution in high-volume production economy. By eliminating localized brazed boundaries entirely and utilizing the full double-sided insert geometry, these tools handle high depth of cut (ap) and volatile interrupted impacts across automotive and heavy industrial components:
High-Volume Automotive Brake Discs & Drums：Maximizes machine uptime in automated production lines by delivering up to 8 continuous fresh cutting corners, dramatically lowering the tooling cost-per-part ratio.
Heavy-Duty Roll Turning & Steel Mill Maintenance：Outlasts ceramic tools by 10× when roughing highly abrasive chilled cast iron rolls and high-speed steel (HSS) metallurgical dies under heavy scaling conditions.
Industrial Pumps, Valving & Slurry Impellers：Easily withstands the volatile sand-inclusion impacts and severe skin-abrasion of raw high-chromium cast iron casting blanks.
Large Gear Rings & Wind Power Bearings: Manages continuous high-feed roughing on large-diameter hardened steel structures (
55), absorbing high heat generation without plastic deformation.
Models & Specs
| ISO Standard Model | Insert Shape & Clearance | Primary Mechanical Application | Industry Standard Sizes |
| CNMN Series | 80° Rhombic (No hole, double-sided) | [Double-Sided Heavy Roughing] Solid rhombic profile with up to 8 usable edges. Engineered for aggressive rough turning of cast iron blanks and brake rotors. | CNMN 120408, CNMN 120412, CNMN 120416 |
| SNMN Series | 90° Square (Maximum corners) | [High-Feed Face Milling & Planing] Rigid square footprint delivering 8 strong corners. Perfect for heavy face milling blocks and scaling cuts on interrupted surfaces. | SNMN 120408, SNMN 120412, SNMN 150612 |
| TNMN Series | 60° Triangle (Maximum edge economy) | [Multi-Directional Continuous Turning] Provides 6 highly cost-effective usable corners for simultaneous O.D. turning, facing, and chamfering packages. | TNMN 160408, TNMN 160412, TNMN 220416 |
| WNMN Series | 80° Trigon (Aggressive edge tracking) | [Severe Interrupted Cuts & Castings] Combines wide trigon geometry with full composite toughness to absorb structural voids and crust variations in large casings. | WNMN 080408, WNMN 080412 |
| DNMN Series | 55° Rhombic (Profile flexibility) | [Profile Copying & Under-Cut Roughing] Offers double-sided usability for narrow profile tracing and heavy copying cycles inside hardened cavities. | DNMN 150408, DNMN 150612 |
1. Full-Surface Solid Sintering vs. Tiny Brazed Patches
Standard tipped CBN inserts restrict your production limits because they only offer 1 or 2 usable brazed corners, leaving the rest of the carbide body wasted. Furthermore, deep cuts (≥1.0 mm) are impossible because the material shear zone would spill over onto the fragile brazing line, triggering immediate severe cracking.
Uking’s Indexable CBN Inserts are built with zero spatial boundaries. The entire upper and lower operating faces consist of industrial-grade PCBN material integrated directly into the carbide spine under large-scale HPHT press blocks. This solid cross-section allows you to increase your depth of cut to the physical machine limits without fearing edge separation, making it the premier choice for aggressive metal removal rates.
2. Up to 8 Edges: The Ultimate Tooling Cost Destroyer
In global automotive sourcing, purchasing managers look beyond the initial purchase price—they hunt for the lowest Cost-Per-Part (CPP).
By utilizing a negative style geometry with no fixing hole (clamped via robust top-clamp holders), our CNMN and SNMN composite series unlock up to 6 or 8 fully operational cutting corners on a single insert body.
Combined with our high-thermal conductivity binder network, each individual corner outlasts conventional carbide by 80×, shrinking tool-change downtime and collapsing your warehouse tooling inventory costs.
Why Choose Uking Diamond Overall Composite?
8 Usable Corners per Insert: Multiplies your usable tooling edges, automatically cutting your tool procurement budget by up to 60%.
Massive Depth of Cut ( ap ) Capability: Solid layer design permits deep roughing passes without encountering fragile brazed line stress fatigue.
Immunity to Heavy Interrupted Shock: Co-sintered structural backing absorbs severe cyclic mechanical pounding during rough cast iron skin scaling.
Optimized Automotive Grade Consistency: Delivers perfectly uniform micro-grain distribution across all edges, ensuring uniform component tracking in high-volume CNC cells.
Application
Parameters
Model: SNGA1204-E
Cutting Edge Length(mm): 12.7
Inscribed Circle(mm) : 12.7
Thickness(mm) : 4.76
Note: E: Double face : Nose Radius It can be customized according to your requirements
Model: CNGA1204-E
Cutting Edge Length(mm): 12.7
Inscribed Circle(mm) : 12.7
Thickness(mm) : 4.76
Note: E: Double face : Nose Radius It can be customized according to your requirements
Model: TNGA1604-E
Cutting Edge Length(mm): 16.5
Inscribed Circle(mm) : 9.525
Thickness(mm) : 4.76
Note: E: Double face : Nose Radius It can be customized according to your requirements
Model: WNGA0804-E
Cutting Edge Length(mm): 8.7
Inscribed Circle(mm) : 12.7
Thickness(mm) : 4.76
Note: E: Double face : Nose Radius It can be customized according to your requirements
Model: CCGW09T3-F
Cutting Edge Length(mm): 9.7
Inscribed Circle(mm) : 9.525
Thickness(mm) : 3.97
Grade: UK6000 UK7800
Note: F: Single face : Nose Radius It can be customized according to your requirements
Model: TCGW0902-F
Cutting Edge Length(mm): 9.6
Inscribed Circle(mm) : 5.56
Thickness(mm) : 2.38
Grade: UK6000 UK7800
Note: F: Single face : Nose Radius It can be customized according to your requirements
Model: TCGW1103-F
Cutting Edge Length(mm): 11.0
Inscribed Circle(mm) : 6.35
Thickness(mm) : 3.18
Grade: UK6000 UK7800
Note: F: Single face : Nose Radius It can be customized according to your requirements
Model: SCGW09T3-F
Cutting Edge Length(mm): 9.525
Inscribed Circle(mm) : 9.525
Thickness(mm) : 3.97
Grade: UK6000 UK7800
Note: F: Single face : Nose Radius It can be customized according to your requirements
Model: DCGW11T3-F
Cutting Edge Length(mm): 11.6
Inscribed Circle(mm) : 9.525
Thickness(mm) : 3.97
Grade:UK6000 UK7800
Note: F: Single face: Nose Radius It can be customized according to your requirements
Are your automated automotive CNC lines bleeding cash due to rapid edge wear, or are your brazed CBN tips cracking whenever you attempt a deeper roughing pass on cast iron blanks?
Stop paying industrial-grade prices for tipped inserts that only give you 1 or 2 usable edges and fail during aggressive roughing cycles. Backed by 20 years of ultra-high pressure and large-scale scale solid-state sintering engineering authority in Henan, China, Uking Diamond supplies high-volume manufacturing lines with industrial-grade Overall Composite Double-Sided CBN inserts that keep your cycle times short and your margins high.
Because these full-solid composite CBN blanks represent highly optimized, high-output production assets, we align strictly with high-intent industrial evaluations rather than distributing unmonitored free samples.
Ready to unlock 8 fresh cutting edges per insert and crush your cost-per-part? Contact our global automotive tooling division today with your current ISO configuration (e.g., CNMN 120412), your target component details (e.g., Brake Rotors or Mill Rolls), and your current cutting feed limits. Our team will immediately issue your Corporate Composite Evaluation Pass: obtain a prioritized evaluation test batch of our double-sided composite inserts at factory-direct wholesale pricing, with 100% of the sample evaluation fee fully credited back to your balance upon your first bulk commercial order.
[ Contact Our Global Tooling Desk & Request Your Composite CBN Quote Now ]
FAQ
Q1: What are Indexable CBN inserts, and how do they provide up to 8 usable cutting edges?
A: UKing Diamond’s indexable CBN inserts combine a full PCBN cutting layer with a carbide substrate through HPHT sintering technology. Unlike single-corner tipped inserts, double-sided indexable designs allow multiple cutting edges to be used on both the upper and lower faces of the insert.
For example:
- CNMN geometry provides 4 usable corners per side, for a total of 8 cutting edges.
- SNMN geometry also provides up to 8 usable cutting edges per insert.
This multi-edge design significantly reduces tooling cost per cutting edge while maintaining the wear resistance, thermal stability, and high-speed machining capability of PCBN. As a result, UKing Diamond’s indexable CBN inserts are widely used in high-volume cast iron and hardened steel production environments where tooling economy is a key consideration.
Q2: Why are Indexable CBN inserts suitable for heavy roughing and large depths of cut?
A: Unlike brazed CBN inserts that utilize a localized PCBN tip at each cutting corner, indexable CBN inserts feature a continuous PCBN cutting layer across the entire working surface.
Because there is no brazed interface within the active cutting zone, cutting forces remain fully supported by the PCBN layer even under demanding machining conditions. This allows depths of cut typically ranging from 1.0 mm to 3.0 mm, depending on workpiece material, machine rigidity, and available spindle power.
For brake disc production, cast iron roughing, pump housing machining, and other high-material-removal applications, UKing Diamond’s indexable CBN inserts help reduce machining cycles, improve productivity, and lower tooling costs per component.
Q3: What materials and applications are Indexable CBN inserts designed for?
A: UKing Diamond’s indexable CBN inserts are optimized for high-productivity machining of:
- Gray cast iron
- Chilled cast iron
- Ductile cast iron
- Powder metallurgy (PM) components
- Hardened steel (HRC 45–60)
Typical applications include:
- Automotive brake discs and brake drums
- Engine blocks and cylinder heads
- Mill rolls and industrial pump housings
- Sintered gears and valve seat components
- Heavy roughing of hardened steel parts
These inserts are primarily designed for high material removal rates, long tool life, and maximum tooling economy. For fine hard turning or premium surface finish requirements, UKing Diamond generally recommends brazed CBN inserts or full-edge PCBN inserts, which are better suited for finishing operations and tighter surface finish specifications.
