WEY JUAN

WEI JUAN (Wey Juan Technology Co., Ltd.) is a Taiwan-based CNC cutting tool manufacturer established in 2000. The company supplies tungsten carbide cutting tools, including end mills, carbide drills, and reamers, to customers in multiple regions. Its manufacturing focuses on precision grinding, material selection, and repeatable inspection, supporting both standard catalog tools and OEM/ODM supply for international partners.

For holemaking applications, WEI JUAN’s carbide drills are positioned for stable tool life, high machining accuracy, and predictable chip evacuation in high-mix CNC environments. The company highlights imported carbide rods from Germany and Japan, modern CNC grinding capabilities, and measurement systems designed to maintain consistent geometry and repeatable performance across production lots.

Recommended
Applications
for WEI JUAN

WEI JUAN carbide drills are suited for shops that need repeatable holemaking under tight tolerance and throughput requirements. They are especially relevant when cycle time and cost per hole depend on stable chip control, heat management, and consistent tool life.

The brand’s application coverage includes precision machining for optical and optoelectronic components, automotive and motorcycle parts, 3C products, aerospace components, medical devices, and mold machining.

For deep-hole or heat-sensitive drilling, internal-coolant designs, where applicable, can support higher cutting speeds and more stable dimensional accuracy by reducing heat buildup and improving chip evacuation. For applications that require accurate hole starts and reduced wander, pairing a spotting or positioning operation with the production drill can help improve hole location repeatability and reduce rework.

How to Choose Carbide Drills
from WEI JUAN

For 5D Drilling with Internal Coolant

Recommended Series: Carbide Drill with Internal Coolant Hole

For 5D drilling applications where heat control, chip evacuation, and dimensional stability are key priorities, WEI JUAN’s Carbide Drill with Internal Coolant Hole is the more application-specific choice.

The SDH5 series is a solid carbide drill with a 5xD flute length and internal coolant holes for deeper-hole drilling. WEI JUAN positions this series for accuracy and dimensional stability at greater drilling depths, with coolant-through delivery that supports higher cutting speeds and feed rates while helping reduce heat buildup and thermal stress.

For production environments, this makes the SDH5 series especially useful when chip packing, thermal load, or tool life can affect hole quality and machining consistency.

For mixed-material operations, the manufacturer describes the series as suitable for steel, non-ferrous metals, high-temperature alloys, and composite materials. In practice, internal-coolant carbide drills are often selected when hole depth, chip evacuation, or heat buildup could increase the risk of tool breakage or dimensional drift.

Best Fit Applications

• 5D drilling where internal coolant delivery is required
• Deeper-hole drilling with higher heat generation
• Production drilling where chip evacuation affects process stability
• Applications requiring accuracy and dimensional stability at greater drilling depths
• Mixed-material operations involving steel, non-ferrous metals, high-temperature alloys, or composite materials

Compatible Materials

• Steel
• Stainless steel
• Cast iron
• Non-ferrous metals
• High-temperature alloys
• Composite materials

Available Lineup

• Carbide Drill with Internal Coolant Hole – 5xD (SDH5 series)
  • Depth class: 5xD
  • Diameter range: Ø3.0–12.0 mm (Type No. SDH5-030 to SDH5-120)
  • Standard size breakdown (Dia. / Flute Length / OAL / Shank Dia.)
    • Ø3.0–3.7 mm: 28 mm / 66 mm / Ø6 mm
    • Ø3.8–4.7 mm: 36 mm / 74 mm / Ø6 mm
    • Ø4.8–6.0 mm: 44 mm / 82 mm / Ø6 mm
    • Ø6.1–8.0 mm: 53 mm / 91 mm / Ø8 mm
    • Ø8.1–10.0 mm: 61 mm / 103 mm / Ø10 mm
    • Ø10.1–12.0 mm: 71 mm / 118 mm / Ø12 mm
  • Representative models: SDH5-030, SDH5-040, SDH5-050, SDH5-060, SDH5-080, SDH5-090, SDH5-100, SDH5-120

For Standard 5D Precision Drilling

Recommended Series: Micro Grain Carbide 5D Regular Drills

For 5D drilling applications that require precision, wear resistance, and stable hole quality without internal coolant holes, WEI JUAN’s Micro Grain Carbide 5D Regular Drills are a practical general-purpose option.

These drills are designed with a 5xD flute length to support deeper holes, stable performance, and efficient chip evacuation. The manufacturer positions the micro- and ultra-fine carbide structure as a foundation for high hardness, wear resistance, and longer tool life in demanding machining environments.

The standard geometry supports high accuracy and smooth surface finishes in steels, stainless steels, cast iron, and non-ferrous materials. Optional coatings, including TiAlN and AlCrN, can further improve heat resistance and support higher-speed machining when the setup and coolant strategy allow.

Best Fit Applications

• Standard 5D precision drilling
• Applications requiring stable hole quality and smooth surface finish
• Production drilling in carbon steel, alloy steel, stainless steel, cast iron, or non-ferrous metals
• Operations where wear resistance and long tool life are important
• Higher-speed machining when optional coatings and proper coolant strategy are used

Compatible Materials

• Carbon steels
• Alloy steels
• Stainless steels
• Cast iron
• Non-ferrous metals

Available Lineup

• Micro Grain Carbide 5D Regular Drills (5D flute length)
  • Diameter range: Ø2.0–16.0 mm
  • Coating options: Uncoated / optional TiAlN / optional AlCrN
  • Standard size structure (Type No. / Drill Dia. / Flute Length / OAL / Shank Dia.)
    • Ø2.0–3.0 mm: 16–20 mm / 50 mm / Ø3 mm (e.g., S97650200, S97650300)
    • Ø3.1–4.0 mm: 25–28 mm / 60 mm / Ø4 mm (e.g., S97650310, S97650400)
    • Ø4.1–5.0 mm: 32–40 mm / 77 mm / Ø6 mm (e.g., S97650410, S97650500)
    • Ø5.1–6.0 mm: 44 mm / 82 mm / Ø6 mm (e.g., S97650510, S97650600)
    • Ø6.1–8.0 mm: 53 mm / 91 mm / Ø8 mm (e.g., S97650610, S97650800)
    • Ø8.1–10.0 mm: 61 mm / 103 mm / Ø10 mm (e.g., S97650810, S97651000)
    • Ø10.1–12.0 mm: 71 mm / 118 mm / Ø12 mm (e.g., S97651010, S97651200)
    • Ø12.1–14.0 mm: 79–90 mm / 138–148 mm / Ø14 mm (e.g., S97651210, S97651400)
    • Ø14.1–16.0 mm: 92–99 mm / 154–162 mm / Ø16 mm (e.g., S97651410, S97651600)
  • Representative models: S97650200, S97650300, S97650400, S97650500, S97650800, S97651000, S97651200, S97651400, S97651600

WEI JUAN Brand Portfolio

End Mills

WEI JUAN’s portfolio includes multiple end mill families such as square end mills, ball end mills, corner-radius end mills, taper end mills, and special-purpose designs. The overall positioning targets CNC users seeking precision surface finish and repeatable geometry across common milling operations.

Drill Bits / Carbide Drills

In addition to micro-grain regular drills, the brand offers internal coolant carbide drills in multiple depth classes (e.g., 3xD, 5xD, 8xD listings). This range supports selection by hole depth, chip evacuation strategy, and thermal load, helping reduce instability in production drilling.

Reamers, Taps, and Supporting Tooling

Complementary categories include solid carbide reamers, taps, tool holders, and accessories, enabling a broader process build-out for shops that prefer supplier consolidation and consistent tooling standards from one manufacturer.

Quality & Certifications

WEI JUAN emphasizes a process-driven approach to quality, describing inspection standards and measurement systems designed to provide accurate inspection reporting and maintain product consistency. The company highlights comprehensive tool measurement using a German ZOLLER measuring instrument and notes the use of modern CNC grinding equipment (including TTB & ROLLOMATIC referenced in its manufacturing description) to support repeatable geometry control and stable performance.

If certification documentation (e.g., ISO scope, audit records, or customer-specific requirements) is needed for supplier qualification, it is recommended to request the latest documents through customer service so procurement teams can verify current compliance status for their region and application.

A Buying Guide for WEI JUAN Tools

To purchase WEI JUAN carbide drills, begin with the official website and product pages to identify the correct series (e.g., internal coolant SDH5 5xD or micro-grain 5D regular drills). For pricing, lead time, and region-specific availability, contact the manufacturer directly to request distributor guidance or a quotation for standard and custom tools.

For more detailed technical information and product comparisons, visit our special feature on carbide drills for stainless steel.
The page highlights three top manufacturers with proven strengths in stainless steel machining, including in-depth coverage of recommended tools for this demanding material.

After-Sales Support from WEI JUAN

WEI JUAN supports customers with customization and application-oriented services, including OEM supply and the ability to develop special tools based on machining needs. For holemaking programs, users can leverage direct communication to request recommendations on drill series selection, depth class (3xD/5xD/8xD), and coating strategy to target stable tool life and process repeatability.

For technical inquiries, product questions, or business cooperation requests, WEI JUAN provides contact channels via its website. When troubleshooting drilling instability, sharing details such as runout, coolant method, spindle power, and hole depth can help narrow root causes and optimize for cycle time and scrap reduction.

Company Information

Address	No. 64, Renzhou St., Fengyuan Dist., Taichung City 42049, Taiwan
Phone Number	+886-4-25293388
Official Website	https://www.wj-tool.com/