DIN 338 Standard
5% Co Alloy
90,000,000+
Annual Drill Bit Capacity
12,000 m²
Modern Production Base
65–67 HRC
Controlled Hardness
20+ Countries
Audited Global Export Footprint
Featured Industrial Tooling & Twist Drill Solutions
High-speed steel tooling, high-cobalt geometries, and abrasive solutions engineered for tight-tolerance fabrication lines and high-output metal production.
135° Split Point
CNC Fully Ground
SUBORUI DIN338 135° Split Point M35 Cobalt Spiral Drill for SS 304/316
1/4" Hex Shank
TiN Coating
SUBORUI 1/4" HSS Fully Ground Titanium Coated Hex Shank Drill Bit
M42 8% Cobalt
3-Piece Set
SUBORUI 20/25/32mm Ultra-Thin Hex Shank M42 Bi-Metal Hole Saw Set
HRC 65 Carbide
4-Flute Design
SUBORUI 4-Flute CNC Solid Carbide End Mill Cutter for Tool Steel
35–100mm Range
Bi-Metal Teeth
Suborui Borderless Spotlight Hole Opener HSS Bi-Metal Hole Saw
125mm Diameter
Diamond Segments
SUBORUI 125mm Fine Abrasive Segmented Cup Diamond Grinding Disc
Ultra-Thin Kerf
Diamond Grit
SUBORUI 100/115mm Precision Thin Diamond Ceramic & Glass Cutting Disc
Technical Analysis: Why M35 (HSSE) Dominates Harsh Machining
High Speed Steel with 5% Cobalt (W6Mo5Cr4V2Co5) delivers the red hardness and thermal boundaries required for austenitic steels, titanium alloys, and continuous CNC cycles.
Thermal Red Hardness
Standard HSS (like M2 or 4241) undergoes rapid softening when friction temperatures exceed 500°C. M35's 5% cobalt matrix stabilizes the martensitic phase up to 600–650°C, sustaining razor-sharp cutting edges even under unlubricated or intermittent coolant setups common in field operations.
135° Split Point Architecture
The DIN 1412 Form C split point reduces chisel edge resistance by over 40%. The bit acts as its own center punch, eliminating tool walk across curved or work-hardened surfaces like pressed automotive chassis or deep drawn stainless structural brackets.
Parabolic Flute Evacuation
In austenitic materials (AISI 304/316), localized work hardening happens instantly if chips bind. Our fully ground spiral geometry features polished flute gutters that optimize curl morphology, rapidly evacuating hot chips and reducing friction-induced drill seizure.
| Material Grade | Cobalt (Co) % | Working Hardness | Thermal Threshold | Primary Application Target |
|---|---|---|---|---|
| HSS 4241 | 0% | 60–62 HRC | < 450°C | Low-carbon steels, structural plastics, aluminum, DIY retail sets |
| HSS M2 (6542) | 0% | 62–64 HRC | < 520°C | Standard machinery steel, cast iron, mild alloys, brass |
| HSS-Co M35 (Our Standard) | 4.8% – 5.2% | 65–67 HRC | 620°C – 650°C | Austenitic stainless steels (304, 316), spring steel, titanium, weld seams |
| HSS-Co M42 | 7.8% – 8.2% | 67–69 HRC | 680°C | Aerospace superalloys, Inconel, heavy-duty production hole saws |
Localized Application Scenarios & Industrial Trends in Miskolc
Borsod-Abaúj-Zemplén county is experiencing an industrial renaissance. From historic heavy machinery traditions to cutting-edge e-mobility and advanced tier-one automotive plants, Miskolc demands tooling that withstands aggressive production pacing.
E-Mobility & Automotive Tier-1 Tooling
With massive investments sweeping Eastern Hungary, local sub-suppliers in Miskolc manufacture battery enclosures, stamped alloy crossmembers, and high-tensile brackets. Custom OEM M35 twist drills deliver predictable tool life across robotic stations and manual repair fixtures, avoiding micro-chipping on abrasive alloys.
Heavy Machinery & Fabrication Line Maintenance
Drawing on Miskolc’s deep metallurgical heritage around Diósgyőr, regional fabrication facilities handle heavy structural steel (S355JR, HARDOX plates, welded assemblies). M35 drill bits with amber oxide or TiAlN coatings deliver the durability required for drilling through flame-cut slag and hardened weld seams without burn-out.
Just-in-Time Inventory & High-Feed Trends
Industrial procurement departments across the Miskolc South Industrial Park increasingly favor direct factory OEM integration over multi-tier distributor markups. Our direct container-load and consolidate-air freight programs ensure stable pricing and consistent batch chemistry, keeping Hungarian plants running smoothly.
Jiangsu WRD Tools Co., Ltd. — Your Direct Production Partner
Operating from Danyang, China's premier cutting-tool manufacturing cluster, we integrate raw steel metallurgy, thermal treatment, precision 5-axis flute grinding, and customized private-label packaging.
Intertek Onsite Verified
Our production floor, QC labs, and operational integrity are audited and certified on-site by Intertek. Comprehensive factory compliance reports ensure rapid vendor onboarding for European buyers.
19+ Years OEM Expertise
Since March 2007, our facility has manufactured cutting tools for tier-one brands worldwide, including BOSCH, Milwaukee, DeWalt, Makita, and Heller. We maintain strict confidentiality and engineering discipline.
Jiangsu High-Tech Enterprise
Recognized as an official High-Tech Enterprise in 2019, our in-house engineering team secures patented flute profiles, optimized core thickness taper, and state-of-the-art salt-bath quenching lines.
Complete OEM Customization
From custom shank geometries (reduced, 3-flat, 1/4" quick-release hex) and laser-etched European standard branding to metal case set configurations, we adapt our tooling to your exact market specifications.
Frequently Asked Questions by Industrial Buyers in Hungary
Direct technical answers addressing logistics, quality validation, customs clearance, and material traceability for buyers in Miskolc and Central Europe.
What verifies the cobalt content in WRD's M35 drill bits?
Every raw material coil or bar stock batch undergoes optical emission spectrometry (OES) testing upon mill delivery to confirm a 4.8% to 5.2% cobalt content alongside balanced molybdenum and tungsten ratios. Spectrometric test certs and Mill Test Certificates (MTC) according to EN 10204 3.1 are provided with every industrial order shipped to Miskolc.
How are shipments handled to the Borsod-Abaúj-Zemplén region?
We operate daily direct shipments from the ports of Shanghai and Ningbo. Full container loads (FCL) or consolidated shipments (LCL) typically route through Koper or Hamburg before direct bonded rail/truck transport into industrial Miskolc. Express air samples or emergency batches land at Budapest Ferenc Liszt International Airport (BUD) within 4 to 6 business days.
What is your Minimum Order Quantity (MOQ) for custom private-label drill bits?
For standard individual bulk DIN338 M35 drill bits with private-label shank laser engraving, our MOQ begins at 500 pieces per size. For custom branded metal cassette sets (e.g., 1–10mm or 1–13mm 19/25-piece drill bit assortments), production begins at 1,200 sets with custom silk-screened logos, molded indexing clips, and retail carton layouts.
Can you manufacture non-standard lengths and specialized flutes?
Yes. In addition to DIN 338 jobber drills, our CNC grinding lines produce DIN 1897 stub drills (for thin sheet metal and automated tapping machines), DIN 340 long-series, and DIN 1869 extra-long drill bits. Custom flute geometries, parabolic chip gutters, and stepped subland geometries can be fully customized based on client CAD drawings.
How do M35 cobalt twist drills perform in automated CNC drilling lines?
Our fully ground M35 bits feature runout tolerances well within DIN standard limits (total radial runout under 0.02mm for diameters up to 10mm). This tight concentricity prevents drill walking and bell-mouthed holes, maximizing tool predictability when mounted in high-speed BT40/ER collet chucks across automated machining lines.
Connect with our Engineering & Export Team
Supplying the automotive, metalworking, and tooling distributor channels of Miskolc. Request a fast wholesale quotation, sample kit, or non-disclosure OEM production review today.