WEY JUAN

WEI JUAN (Wey Juan Technology Co., Ltd.) is a Taiwan-based CNC cutting tool manufacturer established in 2000, supplying tungsten carbide cutting tools such as end mills, Carbide Drills, and reamers to customers across multiple regions. The brand positions its manufacturing around precision grinding, material selection, and repeatable inspection, supporting both standard catalog tooling and OEM/ODM supply for international partners.

For holemaking, WEI JUAN focuses on carbide substrates and production control that target stable tool life, high machining accuracy, and predictable chip evacuation in high-mix CNC environments. The company highlights its use of imported carbide rods (Germany/Japan) and modern CNC grinding capability, combined with measurement systems intended to maintain consistent geometry and repeatable performance across production lots.

Recommended
Applications
for WEI JUAN

WEI JUAN carbide drills are positioned for shops that need repeatable holemaking under demanding tolerance and throughput requirements—especially where cycle time and cost per hole are driven by stable chip control, thermal management, and tool life consistency. The brand highlights application coverage spanning precision machining needs in industries including optical/optoelectronic components, automotive and motorcycle parts, 3C products, aerospace, medical devices, and mold machining.

For deep-hole or heat-sensitive drilling programs, internal coolant designs (where applicable) can support higher cutting speeds and more stable dimensional integrity by reducing heat buildup and improving chip evacuation. For high-accuracy hole starts and reduced wander, pairing a positioning/spot operation with a production drill strategy can help improve hole location repeatability and reduce downstream rework.

Key Products
from WEI JUAN

Carbide Drill with Internal Coolant Hole

Overview

The SDH5 series is a solid carbide drill designed around a 5xD flute length concept and an internal coolant hole structure for deep-hole drilling workflows. WEI JUAN describes this tool family as supporting accuracy and dimensional integrity at increased drilling depths, with internal coolant delivery that enables higher cutting speeds and feed rates while reducing heat buildup and thermal stress. This coolant-through approach can be beneficial in production settings where chip evacuation and thermal stability are critical to tool life and hole quality.

For mixed-material operations, the SDH5 positioning covers a broad scope, with the manufacturer describing suitability for steel, non-ferrous metals, high-temperature alloys, and composite materials. In practice, internal coolant drills are often selected to improve process stability when hole depth, chip packing risk, or thermal load would otherwise increase breakage or dimensional drift.

Compatible Materials

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

Lineup

• Carbide Drill with Internal Coolant Hole – 5xD (SDH5 series)
  • Depth class: 5xD
  • Diameter range: Ø3.0–12.0mm (Type No. SDH5-030 to SDH5-120)
  • Standard size breakdown (Dia. / Flute Length / OAL / Shank Dia.)
    • Ø3.0–3.7mm: 28mm / 66mm / Ø6mm
    • Ø3.8–4.7mm: 36mm / 74mm / Ø6mm
    • Ø4.8–6.0mm: 44mm / 82mm / Ø6mm
    • Ø6.1–8.0mm: 53mm / 91mm / Ø8mm
    • Ø8.1–10.0mm: 61mm / 103mm / Ø10mm
    • Ø10.1–12.0mm: 71mm / 118mm / Ø12mm
  • Representative models: SDH5-030, SDH5-040, SDH5-050, SDH5-060, SDH5-080, SDH5-090, SDH5-100, SDH5-120

Micro Grain Carbide 5D Regular Drills

Overview

WEI JUAN’s Micro Grain Carbide 5D Regular Drills are built for precision drilling with a 5×D flute length, targeting deeper holes while maintaining stability and efficient chip evacuation. The manufacturer positions the micro/ultra-fine carbide structure as a base for high hardness, wear resistance, and longer tool life in demanding machining environments.

These drills are described as using standard geometry for high accuracy and smooth surface finish in steels, stainless steels, cast iron, and non-ferrous materials. The product page also notes optional coatings (including TiAlN and AlCrN) to enhance heat resistance, supporting higher-speed machining strategies when the setup and coolant strategy allow.

Compatible Materials

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

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/