Bi-Metal Core Cutting
Catalog Overview
High-Efficiency Holemaking Systems & Cutters
Engineered for high-torque magnetic drilling units and heavy-duty industrial machinery. Designed to exceed ISO and DIN performance standards under extreme continuous workloads.
Surface Preparation
SUBORUI 125mm Fine Abrasive Segmented Cup Diamond Grinding Disc
High-Alloy Cutters
BORUI 12-80mm HSS Hardened Core Cutter Set for Inox & Structural Steel
Heavy Foundation
SUBORUI Heavy-Duty Carbide SDS Max Masonry & Foundation Core Cutter
Regional Industrial Analysis
Gothenburg’s Structural Engineering & Drilling Demands
As the Nordic region’s largest logistics gateway and industrial cluster, Gothenburg imposes uncompromising metallurgic criteria on magnetic drilling tools and annular cutters.
Port of Gothenburg Marine Works
Continuous expansions across the Skandia and RoRo terminals demand high-speed holemaking through thick-walled structural steel and heavy sheet piles, often under saline conditions requiring optimal wear coatings like TiAlN and extreme concentricity.
Västsvenska Paketet & Railway Civils
Large-scale civil infrastructure projects like Västlänken (the West Link) demand TCT core cutters capable of piercing wear-resistant rail head steels and heavily reinforced girders with zero tolerance for pilot pin binding or premature tooth chipping.
Automotive & Heavy Vehicle Assembly
Surrounding Torslanda and Lindholmen engineering clusters rely heavily on Weldon-shank core cutters for prototyping and specialized chassis fabrication involving micro-alloyed and Domex high-strength structural sheets.
Engineering Specialized Drill Bits for Nordic Standards
We configure tooth geometry, gullet rake angles, and flute clearing depths specifically to manage SS-EN 10025-2 structural grades (S235, S355J2+N) and SS2343 (316L) acid-proof stainless steels without micro-fracturing.
Technical Metallurgy
High-Speed Steel vs. Carbide Core Bit Specifications
A rigorous metallurgical comparison to help structural engineers and Swedish procurement managers select optimal cutter dynamics based on hole diameter, depth, and substrate hardness.
| Evaluation Parameter | HSS-E M35 Cobalt (5% Co) | HSS-E M42 Cobalt (8% Co) | TCT (Carbide Tipped Sandvik Grain) |
|---|---|---|---|
| Rockwell Hardness (HRC) | 64.0 – 66.0 HRC | 66.5 – 68.5 HRC | 91.5 – 93.0 HRA |
| Gothenburg Substrate Target | S235, S355, Standard Plate <750 N/mm² | S355J2+N, Boiler Plate, HARDOX 400 | Hardox 450/500, Inox 304/316L, Rail |
| Cutting Speed (VDI / Surface m/min) | 18 – 25 m/min | 22 – 32 m/min | 35 – 60 m/min |
| Impact Resistance (Toughness) | Extremely High (Flex tolerant) | High (Optimized balance) | Moderate (Brittle under erratic feeding) |
| Optimal Feed Rate (mm/rev) | 0.08 – 0.12 mm/rev | 0.10 – 0.15 mm/rev | 0.12 – 0.20 mm/rev |
| Shank Compatibility | 19.05mm (3/4") Weldon / Nitto Dual | 19.05mm (3/4") Weldon Flat | Weldon / Fein Quick-IN Compatible |
Enterprise Credentials
Jiangsu WRD Tools: Certified Manufacturing Authority
Combining 19 years of dedicated cutting-tool fabrication with Intertek-verified quality management to deliver low total cost of ownership (TCO) directly from our factory floor.
Intertek On-Site Verified
Our comprehensive facilities, thermal treatment lines, and precision testing labs have undergone thorough on-site verification by Intertek, assuring complete procurement compliance for Swedish importers.
Tier-1 Global OEM Pedigree
We engineer tooling components and private-label products trusted by major brands including BOSCH, Milwaukee, Makita, DeWalt, and Heller, guaranteeing consistent metallurgy and tight geometric runout.
High-Tech Enterprise Certified
Certified as a Provincial High-Tech Enterprise since 2019, our factory operates five-axis CNC flute grinding machines and dedicated computer-controlled multi-stage salt-bath and vacuum hardening chambers.
Annular Cutter Dedicated Workshop
CNC Fully-Ground Production Line
Multi-Stage Quality Inspection Lab
Procurement Clarity
Gothenburg B2B Sourcing FAQ
Addressing core questions from Swedish project leaders, industrial tool distributors, and wholesale purchasers regarding lead times, specifications, and certifications.
What shank configurations are stocked for the Swedish market?
We supply standard 19.05mm (3/4") Weldon shanks with dual-flat ground locks compatible with magnetic base drills such as Euroboor, BDS, Rotabroach, and Alfra. We also manufacture tool-free Fein Quick-IN shanks and universal three-notch combinations.
How do you control runout and tooth geometry on large diameters?
Every cutter undergoes optical laser profiling to guarantee radial runout within ≤0.02mm. Our three-ply variable tooth geometry balances cutting pressure across outer, intermediate, and inner teeth, suppressing tool chatter on thick flanges.
What are the typical sea and air transit timelines to Gothenburg?
Air cargo shipments direct to Göteborg Landvetter Airport (GOT) take 4–7 business days for urgently needed project batches. Regular consolidated FCL/LCL ocean freight directly into the Port of Gothenburg routes reliably in approximately 26–32 days.
Can we specify custom coatings for marine or structural steel jobs?
Yes. Beyond standard bright and steam-tempered finishes, we deposit industrial TiN (Titanium Nitride), TiAlN (Titanium Aluminium Nitride), or AlTiN coatings designed specifically to resist oxidation at temperatures exceeding 800°C when drilling dry or under low coolant conditions.
What minimum order quantities (MOQs) apply to customized OEM runs?
For custom laser-marked Weldon annular cutters and branded packaging, our baseline order starts at just 50 pieces per size, or 10 sets for boxed core drilling kits. Standard non-branded inventory is available at 10 pieces per specification.
Do your tools satisfy European Union material traceability criteria?
Yes. All incoming raw HSS and tungsten carbide materials undergo spectral analysis to verify European standard conformity (EN ISO 4957). Material inspection certificates (EN 10204 3.1) and RoHS/CE compliance documents accompany wholesale shipments.
Request Direct-Factory Quotations & Engineering Samples
Contact our engineering sales team with your specifications, CAD drawings, or distribution forecasts. Receive comprehensive pricing sheets and material inspection reports within 24 hours.