What is the minimum order quantity for APEX carbide rods and tools?

Standard carbide rods and tools start from 1 piece, and samples are available so you can validate grade, tolerance and finish before scaling up.

What is the typical lead time?

Typical delivery is 7–25 days depending on diameter, grade, finishing (unground, ground, chamfered, coated) and batch size. Stock rod blanks ship fastest.

Which tolerances can you grind carbide rods to?

Rods can be supplied unground or centerless ground to common tolerances such as h5, h6 or -0.005 mm, with end chamfers and Weldon flats on request.

Can APEX produce carbide parts to my drawing?

Yes. We provide OEM/ODM manufacturing of non-standard carbide blanks, custom drills, end mills and wear parts according to customer drawings and samples.

What is your production capacity?

APEX operates 3 factories with more than 500 workers. Standard tool lines are rated at up to 1,000,000 pieces per month.

Precision Tooling & Materials Engineering Whitepaper

China Straight Shank Drill Bits Manufacturer & Manufacturers

Pioneering Sinter-HIP densification, submicron WC-Co substrate design, and automated 5-axis CNC grinding to deliver mission-critical rotary tooling for global automotive, aerospace, electronics, and heavy machining sectors.

ENGINEERING SHOWCASE // CATALOG A

High-Performance Straight Shank Solid Carbide Blanks & Tools

Ultra-fine grain structural integrity, h5/h6 tolerances, and tailored PVD/CVD wear-resistant architectures designed for zero-runout machining.

Wholesale Flat End Mill 6 Flutes Straight Shank with NaNo Blue Coating

Flat End Mill 6 Flutes Straight Shank NaNo Blue Coating

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Cut-to-Length Solid Carbide Rods/Bars for European Market

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Wholesale High Quality Tungsten Solid Carbide Rod Ground or Unground

High Quality Tungsten Solid Carbide Rod (Ground/Unground)

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Carbide Preformed Ball Nose Blank Rods Pre-Machined Sphere Tip

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Wholesale Tungsten Carbide discs cutting discs

Tungsten Carbide Cutting Discs (Various Standard Sizes)

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Precision-Ground Tungsten Carbide Blanks & Preforms

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Carbide End Mills for Aluminum Multi-Colored Coating

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China Custom Tungsten Carbide Cylindrical Parts Slotted Top

Custom Tungsten Carbide Cylindrical Parts with Slotted Top

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100%

Sinter-HIP Low-Pressure Densification

≤ 0.002mm

Ultra-Precision Runout Accuracy

1,000,000+

Monthly High-Precision Capacity

5,000+

Global Tier-1 Enterprise Partners

SUPPLY CHAIN RESILIENCE

China Factory 4.0: Metallurgical Control & Capacity

Vertically integrated operations from ammonium paratungstate (APT) reduction and automated spray drying to 5-axis robotic centerless grinding.

In-House Metallurgical Formulation

By controlling ball milling, paraffin waxing, and spray drying within controlled atmospheric chambers, grain size distribution is maintained between 0.4μm and 0.8μm for exceptional transverse rupture strength (TRS ≥ 4000 MPa).

Elimination of binder pooling and micro-structural voids
Customized cobalt ratios (6%–12%) tailored to target hardness
Rigorous X-ray diffraction and magnetic saturation testing

Automated Sinter-HIP Consolidation

Processing under 60-100 bar isostatic argon pressure at 1450°C ensures liquid-phase sintering reaches theoretical density (14.40–14.95 g/cm³), eliminating premature cutting edge chipping.

Near-zero residual micro-porosity (A00, B00, C00 standard)
Elimination of thermal fractures during high-feed operations
Guaranteed batch-to-batch consistency for volume contracts

Sub-Micron Centerless Grinding

Multi-axis Swiss and German CNC grinding units deliver precise outer-diameter (OD) profiles, standard h5/h6 shank tolerances, controlled chamfer geometry, and Weldon flat indexing.

Surface roughness down to Ra 0.1 μm for minimal friction
Runout accuracy held within ≤ 0.002 mm along full length
Flawless chuck gripping in hydraulic and shrink-fit holders

CROSS-SECTOR ENGINEERING

Engineered Solutions for Critical Industrial Applications

Balancing edge strength, thermal conductivity, and dynamic stability for challenging workpiece alloys and demanding cycle times.

Aerospace & Defense

High-efficiency deep-hole and assembly drilling in Titanium (Ti-6Al-4V), Inconel 718, and Carbon Fiber Reinforced Polymers (CFRP).

Helical coolant delivery prevents work hardening
Special point geometries limit delamination
Exceptional tool life across exotic superalloys

Automotive Powertrain

Engineered for high-throughput cast iron (CGI/GCI), forged steel crankshafts, structural aluminum frames, and transmission gear assemblies.

High penetration rates reduce cycle seconds
Optimized web thickness resists high torque loads
Consistent tool life supports lights-out machining

Micro-Drilling & 3C

Specialized tooling for IC substrates, multi-layer HDI printed circuit boards, server chassis, and copper heat-sink components.

Diameters down to Ø0.1 mm with low runout
Mirror-polished flutes prevent chip packing
Sharp cutting edges reduce exit burr formation

Die & Mold Manufacturing

Reliable machining of hardened tool steels (H13, D2, P20, NAK80) from 45 HRC up to 68 HRC with exceptional dimensional fidelity.

TiSiN and AlTiN coatings provide high heat shield
Rigid straight shank limits deflection during plunge
Excellent surface finish cuts down manual polishing

TECHNICAL ROADMAP

Metallurgical Selection & Future Tooling Roadmap

Data-driven substrate selection for precision machining, matching binder content and grain size to mechanical demands.

Cobalt Grade	Grain Size (μm)	Hardness (HRA)	TRS (MPa)	Thermal Shock Resist.	Target Workpiece & Typical Application
6% Co Ultra-Fine	0.4 – 0.6	92.8 – 93.5	3800 – 4100	Moderate	Cast iron, non-ferrous alloys, abrasives, graphite, micro-PCB
8% Co Submicron	0.6 – 0.8	92.2 – 92.7	4000 – 4300	High	Structural steels, alloy steels (≤45 HRC), general deep-hole drilling
10% Co Standard	0.7 – 0.9	91.8 – 92.3	4200 – 4500	Very High	Stainless steels (304/316), high-temp alloys, interrupted cuts
12% Co Nano-Matrix	0.2 – 0.5	92.5 – 93.0	4400 – 4800	Extreme	Hardened tool steels (55–68 HRC), aerospace titanium framing

Future Coating Architecture

Moving from traditional binary coatings to HiPIMS-deposited gradient nanocomposite layers (TiAlSiN, AlCrSiN, diamond-like carbon) that remain stable up to 1200°C without spalling.

Dynamic Helix Flute Geometries

Variable pitch flutes and progressive core taper architectures break harmonic vibration patterns at high spindle speeds, improving hole circularity and tool life.

Smart Tooling Blanks

Development of internal helical coolant channels optimized through computational fluid dynamics (CFD) to maximize chip flushing pressure during MQL drilling.

GLOBAL LOGISTICS & COMPLIANCE

Procurement Frameworks & Quality Compliance

Reliable logistics, certified supply chains, and transparent trade terms for international procurement divisions.

Traceability & Material Certifications

Every shipment comes with detailed mill test certificates covering chemical composition, grain size distribution, density, hardness, and TRS testing under ASTM B406 / ISO 3327 standards.

Conflict-free mineral verification (RMI compliant)
ISO 9001:2015 certified quality management system
Batch-level laser serial tracking on finished shanks

Inventory Buffering & Consignment

We work with international OEM tool grinding centers to maintain strategic safety stocks of standard straight shank rods and semi-finished blanks, reducing supply volatility.

Standard stock blanks ready for 7-day express dispatch
Flexible MOQs (from 1 pc prototype runs to 100k+ series)
Air-tight, oil-coated, impact-resistant protective packaging

Application Engineering Support

Our bilingual metallurgy and cutting-tool engineers collaborate directly with your tooling design teams to review 2D/3D CAD drawings and refine geometries for your applications.

Direct engineering review (SolidWorks, STEP, DXF)
Feed, speed, and chip-load recommendations
Root-cause tool failure wear analysis on used drills

TECHNICAL FAQ

Frequently Asked Questions on Straight Shank Drill Bits

Key metallurgical and manufacturing considerations for production managers and global procurement teams.

Why choose solid carbide over high-speed steel (HSS-E/Cobalt) straight shank drills?

Solid carbide provides roughly three times the elastic modulus of HSS, dramatically reducing tool deflection, chatter, and runout during aggressive plunge cycles. Sinter-HIP tungsten carbide maintains cutting-edge hardness past 800°C, enabling cutting speeds (Vc) 3 to 5 times faster than premium HSS drills, reducing cycle times and unit costs in high-volume production.

What shank tolerances are provided, and do you supply Weldon flats?

Our standard ground straight shank blanks conform to DIN ISO 286 h6, with h5 available upon request for high-precision hydraulic, shrink-fit, and high-frequency collet chucks. We also machine DIN 6535 HB/HE side clamping flats (Weldon flats) and 45° shank lead-in chamfers to streamline automated tool changer indexing.

How does Sinter-HIP processing compare to conventional vacuum sintering?

Standard vacuum sintering often leaves microporosities that can cause cutting edge chipping or catastrophic fracture under heavy cyclic torsional loads. Sinter-HIP introduces high-pressure argon gas (up to 100 bar) during the molten liquid phase, closing microscopic pores to achieve theoretical density, higher transverse rupture strength, and predictable tool life across volume batches.

What internal coolant-hole configurations are available for deep-hole drilling?

We manufacture solid carbide rods with central straight coolant channels, two parallel straight coolant holes, and twin helical internal coolant holes (30° and 40° helix angles). Helical coolant channels align with the flutes of deep-hole drill bits (≥5xD to 30xD), delivering high-pressure coolant directly to the shear zone for efficient chip clearing and cooling.

ENGINEERING SHOWCASE // CATALOG B