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Flat-bottom-cylindrical-end-mill-1
Flat-bottom-cylindrical-end-mill
Flat-bottom-cylindrical-end-mill-1
Flat-bottom-cylindrical-end-mill

Diamond coating Flat-bottom cylindrical end mill

Standard 2-flute/4-flute design with sharp cutting edges and large chip clearance space, suitable for efficient roughing and semi-finishing of graphite electrodes.
  • 9800–10000 HV, approaching that of natural diamond, far surpassing carbide (approx. 1500 HV) and TiAlN coatings (approx. 2800 HV).
  • 10–20 times longer than carbide when machining graphite; 4–6 times longer than conventional coatings for carbon fiber/glass fiber.
  • Resists abrasive wear, maintains sharpness over extended periods, minimizing chipping.
  • Thermal conductivity: 2000 W/(m·K) (vs. carbide: 80–100), enabling rapid heat dissipation.

Maximum Straightness and Service Life: Why CVD Diamond Square End Mills are the Global Benchmark for Precision Machining

In the high-load roughing and precision finishing of flat surfaces, square end mills (flat mills) bear the brunt of mechanical stress. However, when machining abrasive materials like graphite, high-silicon aluminum alloys, or fiber-reinforced composites (FRP), traditional carbide mills suffer rapid flank wear and bottom-edge chipping. This results in “tapered” profiles, out-of-tolerance slots, and expensive scrap.

Tiansheng Hengzuan (TSHZ) has engineered the CVD Diamond Coated Square End Mill to secure edge sharpness at the atomic level. By utilizing a $HV10,000$ diamond armor, we deliver long-term verticality and unparalleled flatness for your most demanding projects.

1. Core Pain Points: Why Standard Square Mills Fail in High-Load Machining

A. Dimensional “Shrinkage” due to Edge Blunting

In slotting and shoulder milling, the verticality of the peripheral edge is vital.

The Failure: When milling graphite, tungsten carbide edges wear down almost instantly. As the tool diameter shrinks, the resulting deep slots or steps develop a tapered deviation, leading to assembly failure or loss of airtightness in molds.

B. Bottom-Edge Chipping and Flatness Deviation

During face milling or floor finishing, the bottom edge bears the primary axial cutting force.

Quality Crisis: As the tool dulls, cutting resistance spikes, leading to micro-chipping on the bottom edge. This creates “step marks” and ruins the surface roughness, making it impossible to achieve a mirror finish.

C. Surface Scratches caused by Built-Up Edge (BUE)

When machining “gummy” materials like aluminum or plastics, chips tend to weld themselves onto the square cutting edge.

The Failure: BUE alters the actual geometry of the tool, leading to severe surface scratches and sudden dimensional jumps during the milling cycle.

2. The TSHZ Technical Edge: Engineering for Stability

A. HV10,000 Hardness: Defending Peripheral Verticality

Our CVD Diamond coating is maintained at a consistent thickness of 10-15μm, with a hardness five times that of tungsten carbide.

Longevity Benchmark: In continuous graphite electrode machining, TSHZ square end mills provide a cutting length up to 15x longer than standard tools. This allows you to maintain stable slot widths for shifts at a time without needing constant tool offset compensations.

B. Mirror-Finish Post-Treatment: Friction Coefficient < 0.1

The flatness of the bottom edge dictates the surface quality of the workpiece floor.

The Advantage: Our diamond surfaces undergo ultrasonic polishing to achieve extreme smoothness. This minimizes friction, prevents the adhesion of aluminum alloys, and allows the machined surface to retain the high brightness and original luster of the metal.

C. Substrate Optimization: High Impact Resistance

Roughing with square end mills often involves interrupted cuts and high impact loads.

Reliability: TSHZ utilizes a high-toughness carbide substrate specifically for non-standard square mills. Combined with our atomic-level bonding process, the coating remains intact without peeling or edge failure under heavy-duty cycles.

3. Key Industry Application Scenarios

Graphite Mold Roughing: Ideal for the rapid material removal and floor finishing of 3D glass hot-bending molds for smartphones.

High-Silicon Aluminum Machining: High-efficiency milling for NEV (New Energy Vehicle) motor housings or gearbox casings, effectively suppressing tool sticking.

Fiber Reinforced Plastics (FRP): Precision trimming and slotting for aerospace interior components, ensuring clean, burr-free edges.

4. Expert Machining Parameters (Graphite/Aluminum Optimized)

Specification (Dmm) Recommended RPM Feed Rate (mm/min) Axial Depth (Ap​mm) Radial Depth (Ae​mm)
φ1.0 35,000 – 45,000 800 – 1,200 0.05 – 0.10 0.2 – 0.4
φ4.0 12,000 – 18,000 1,500 – 2,500 0.20 – 0.50 0.8 – 1.5
φ10.0 6,000 – 10,000 2,500 – 4,000 0.50 – 1.50
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PCB-diamond-drill-bit

PCB diamond drill bit

PCB drill bits with excellent chip removal and hole roughness capabilities, long service life, suitable for drilling general multilayer and HDI boards, FR-4, CEM-1 boards, and eco-friendly boards. Diameter range: 0.1–3.175 mm,For the latest PCB boards, diamond-coated drills achieve over 3,000 holes per bit.
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PCB Diamond-Coated Milling Cutters

PCB diamond-coated milling cutters, also known as PCB routing cutters, printed circuit board milling cutters, or engraving cutters, are primarily used for contour cutting, slotting, depth-controlled milling, V-grooving, half-hole machining, and gold finger chamfering of PCBs; they are the most commonly used carbide tools in post-PCB manufacturing processes.
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CVD Diamond Dental burs

Micron-level precision cutting, balancing ultimate wear resistance with a gentle clinical experience,This series of dental burs features a high-purity integrated stainless steel/carbide substrate, coated with advanced CVD nano-diamond (or high-density natural diamond grit electroplating). Engineered for high-intensity clinical procedures such as tooth preparation, cavity access, decay removal, cosmetic restoration (veneer prep), and crown/bridge cutting. The ultra-hard, uniformly distributed diamond coating delivers aggressive cutting efficiency while minimizing frictional heat to protect the dental pulp, making it the premium choice for modern digital dentistry.
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Round-Nose-End-Mill

Diamond coating Round Nose End Mill

Balances the corner-clearing capability of flat-end mills with the chipping resistance of ball-end mills, extending tool tip life and enabling rapid roughing of cavities.
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Our Blog

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12/ May

What is the biggest bottleneck for global AI computing power? It is a drill bit with a diameter of less than 0.2 millimeters.

Everyone is obsessing over Nvidia’s GPUs and HBM memory. But here is the cold truth about 2026: The biggest threat to global AI server delivery isn’t a chip shortage or a lack of light modules. It is a needle—a micro-drill bit less than 0.2mm in diameter. Think about it. We are building “Cathedrals of Computation” that cost billions, yet their survival depends on whether we can drill 100,000 perfect holes in a high-density backplane without snapping a single needle. In the world of AI, 0.01mm of deviation isn’t an error; it’s a total system collapse. Why is this happening now? Because Nvidia’s new architectures (Rubin/Rubin Ultra) have pushed PCB materials to the physical limit. We’ve moved from standard FR-4 to M9 high-frequency materials filled with 99.99% silica—essentially drilling through quartz. The tool life has plummeted from 2,000 holes to barely 200. This is no longer “manufacturing”; it is atomic-scale carving. If your tool provider doesn’t understand the micro-physics of CVD coatings, your production line is a ticking time bomb.     To secure your position in the AI supply chain, stop looking at “Price per Tool” and start looking at these three technical moats: 1.Aspect Ratio Mastery (50:1): For 8mm thick boards, you need a 50x aspect ratio. Only a handful of companies globally can maintain verticality at this scale. Ensure your supplier uses Gradient CVD Diamond Coatings to manage the thermal shock that exceeds 800℃ at the tip. 2.Equipment Autonomy: The global lead time for Swiss-made high-precision grinders is now 18 months. If your supplier doesn’t manufacture their own CNC grinding equipment, they cannot scale with your demand. Vertical integration is the only hedge against supply chain paralysis. 3.Substrate Decobaltization Depth: Check the chemical treatment of the tungsten steel substrate. For AI-grade M9 materials, you need a precise decobaltization depth to ensure the diamond coating doesn’t peel under high-frequency friction. The AI revolution is loud, but the real winners are those mastering the silence of the laboratory. But the reality is extremely cruel and absurd: in 2026, the fate of global AI computing power will be determined by a “toothpick” with a diameter of less than 0.2 millimeters, thinner than a human hair. This is an extremely pathological phenomenon. We can design a GPU capable of trillions of operations per second, yet often a $5 diamond drill bit deviating by just 0.01 millimeters during drilling can cause an entire AI server backplane, worth a fortune, to be scrapped. This is not precision manufacturing; it’s like defusing a bomb in the microscopic world. In 2026, the biggest failure for a PCB Procurement Director isn’t paying too much—it’s buying “garbage” that kills the factory’s yield. Most people don’t realize that the AI server boards for NVIDIA aren’t just “thicker”; they are physically “hostile” to traditional tools. When you use a standard tungsten needle on M9 high-frequency material, you aren’t manufacturing; you are committing “industrial suicide.” A deviation of 0.01mm—the width of a ghost—and a 50,000 backplane becomes scrap metal. In this era, “cheap” is the most expensive mistake you can make.     As a Procurement Director, you must enforce these three “Hard-Core” technical filters to protect your margins: Demand the “SP3 Bond Density” Certificate: Don’t settle for “Diamond-like” claims. Real CVD Diamond coatings must have an SP3 content that hits a hardness of 80-100 GPa. Insist on a Raman Spectroscopy report. Only a high SP3 peak ensures the drill won’t soften under extreme friction, allowing you to hit 2,000 holes instead of 200. Verify “Nano-scale Decobaltization” Depth: Diamond and Tungsten are naturally incompatible. Premium tools require a chemical decobaltization process at a specific nano-depth. If the substrate isn’t treated perfectly, the coating will peel off like “dead skin” under stress. Ask for the “Gradient Interface” specs; this is the difference between a tool that lasts a shift and one that snaps in seconds. Audit the “Honing Radius” Precision: Thicker coating is a trap. If it’s too thick, the cutting edge becomes rounded, skyrocketing the cutting force and shattering the board. The gold standard is a post-coating edge radius (Honing) strictly under 2 μm If the Ra (Roughness) of the hole wall doesn’t hit nano-levels during testing, reject the batch immediately. 4.In the age of AI, the Procurement Director is the factory’s “Technical Firewall.” The battle for AGI isn’t just about silicon; it’s about that unbreakable, 0.2mm needle forged in a vacuum.      At TSHZ (Tiansheng Hengzhuan), we don’t sell consumables; we sell the “Skeletal Support” for the world’s most powerful servers. If you’re tired of explaining scrap rates to your boss, let’s talk. Real solutions aren’t found in the “lowest price” column—they are grown in the lab, atom by atom.
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PCB drilling

26/ April

Stop the $5 Price War: Join the CVD Diamond Revolution and Capture the 2026 Blue Ocean.

Headline: Dominate the High-End Market: TSHZ Global Recruitment for CVD Diamond Tool Distributors The Context: Manufacturing in Vietnam, Thailand, and Malaysia is shifting from “low-cost assembly” to “high-precision engineering.” While your competitors are fighting a price war over $5 carbide mills, are you ready to offer the “1 = 20” Diamond Solution that ends the competition? Why TSHZ is the Ultimate Tool for SEA Distributors: The “Japan/Germany” Alternative: Our performance rivals top-tier global brands, but our pricing structure allows you to capture the market aggressively. Give your clients premium quality without the premium price tag. The AI Server Boom: As PCB manufacturing for AI servers migrates to Southeast Asia, the demand for high-layer count drilling is exploding. TSHZ Diamond Drills are the only solution for “Zero Smear” and “Zero Breakage” in 32-layer boards. Full-Scale Empowerment: We provide more than just tools. You get our full library of viral marketing videos (FB/TikTok), technical white papers, and 24/7 engineering support from our Shenzhen HQ. The Market is Blue. The Opportunity is Now. Most distributors are still sleeping on CVD technology. Be the first in your region to bring the “Industrial Tooth” of 2026 to your clients. [CTA]: DM for the “SouthEast Asia Partner Growth Kit” and request your trial samples today.
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25/ April

Beyond Silicon: Why a Few Grams of Lab-Grown Crystals in Jiangxi Will Redefine High-End Manufacturing

1. The “Cold War” in the Lab: Why Diamonds are the Ultimate Frontier While the world fixates on the scarcity of “luxury diamonds,” a more strategic battle is unfolding in the laboratories of Shenzhen Tiansheng Hengzhuan Technology. For their engineers, diamonds are not jewelry—they are the “Ultimate Semiconductor.” As silicon-based chips approach their physical limits (Moore’s Law), and Gallium Nitride (GaN) reaches its thermal ceiling, the industry is pivoting toward a “Heat-Sink Savior.” The upcoming National Key Laboratory for Diamond Materials in Jiujiang, Jiangxi, is not just a research center; it is a declaration of war against the “Thermal Barrier” in high-power electronics. 2. A Strategic Convergence: Shenzhen’s “Brain” Meets Jiujiang’s “Hand” Why would a high-tech powerhouse from Shenzhen’s tech hub relocate its crown jewel—a National Key Lab—to Jiujiang, Jiangxi? This is a calculated Supply Chain Symbiosis. Tiansheng’s “Cognitive Edge”: With dozens of patents in CVD (Chemical Vapor Deposition) growth and precision doping, Tiansheng understands that the next bottleneck for 5G base stations, deep-sea probes, and military radar is not logic, but Heat Dissipation. Jiujiang’s “Industrial Depth”: Jiangxi’s strategic layout in advanced materials provides more than just policy incentives. It offers a stable energy grid and a manufacturing ecosystem capable of scaling lab breakthroughs into industrial reality. 3. Inside the Lab: Cracking the “Anti-Human” Challenges of Physics This lab isn’t chasing headlines; it’s chasing the limits of atomic physics. Here are the three technical pillars Tiansheng is fortifying: I. The Thermal Conductivity Gamble Diamonds possess the highest natural thermal conductivity (over $2000 W/m·K$), five times that of copper. Tiansheng’s mission is to achieve large-area, high-purity diamond wafer fabrication. This requires simulating “Subterranean Extremes” in a vacuum, forcing carbon atoms to align with sub-nanometer precision. II. The “Forbidden Zone” of N-type Doping Diamonds are natural insulators. Turning them into semiconductors requires “Doping”—a process akin to modern alchemy. Tiansheng’s lab is tackling the stability of N-type phosphorus doping, a hurdle that has stumped global researchers for decades. Success here means processors that can operate at $500^{\circ}C$ without melting. III. The Cost Revolution via Laser Peeling A lab is only as good as its commercial viability. The Jiujiang facility is refining proprietary Laser Lift-Off (LLO) and non-destructive grinding techniques. By slashing the cost of diamond substrates, Tiansheng aims to transition this “Black Tech” from orbital satellites to everyday smart EVs. 4. The Stakes: What Happens If We Fail? In the race for hypersonic flight, quantum computing, and long-range radar, the winner won’t be the one with the best software, but the one with the best Material Science. By planting this flag in Jiujiang, Tiansheng Hengzhuan is executing a “Dimensional Strike” on traditional semiconductor paths. While others patch up silicon-based systems, Tiansheng is digging trenches in the “No-Man’s Land” of diamond electronics. 5. Elevating Value: The Era of “Deep Tech” Patience This news isn’t just about corporate expansion; it’s about a shift in the industrial zeitgeist. In an era of “Quick Capital,” Tiansheng has chosen the arduous path of fundamental science. These few grams of lab-grown crystals will eventually serve as the “Skeletal System” for the next generation of global high-end equipment.
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1/ April

Sustainable Manufacturing Trend: Diamond Coating Listed as a Key Technology for “Green Machining”

Global manufacturing’s environmental requirements will reach a new high in 2026. Due to their exceptionally long service life, CVD diamond tools significantly reduce the carbon footprint associated with discarded tools and enable higher-efficiency dry machining (reducing cutting fluid pollution), leading multiple governments to include them on their recommended lists for sustainable manufacturing.
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Graphite, Ceramics, and Carbon Fiber are the future, but they are “tool killers.” If you’re still using traditional coating, you’re fighting a losing battle.
Our CVD (Chemical Vapor Deposition) Diamond Coating creates a real crystalline diamond layer on the carbide substrate. This isn’t just a “finish”—it’s a shield.

Why top distributors choose our CVD series:
1.Ultra-Low Friction: Prevents chip welding and heat buildup.
2.Extreme Abrasion Resistance: Maintains sharp cutting edges $20 \times$ longer.
3.Surface Finish: Mirror-like results on the workpiece, zero secondary polishing needed.

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