DM M5 Ø4.5mm Collar-Type Thermal Drill Bits for Industrial Production
Industrial-Grade Tungsten Carbide Thermal Flow Drill Bits for Chip-Free Friction Drilling and High-Strength M5 Thread Forming
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Features
Thermal Friction Flow Forming: Operates at 600°C+ to plasticize metal and extrude a strong threaded bushing in seconds.
Replaces Rivet & Weld Nuts: Creates a monolithic extruded boss with 3x the original sheet metal wall thickness.
Ultra-Hard Tungsten Carbide: Micro-grain solid carbide substrate provides extreme heat resistance and 10,000+ hole tool life.
Integrated Collar Trimming: Single-step bit trims displaced flash and forms a neat collar ring in one pass.
In-Depth Engineering Description & Technical Overview
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Overview & Thermal Flow Drilling Principles
The DM M5 Ø4.5mm Collar-Type Thermal Drill Bit utilizes friction-generated heat to plasticize metal sheet materials, forming a continuous, high-strength bushing without generating chips or metal swarf. Designed specifically for preparing holes prior to M5 cold roll-forming tapping, this high-grade tungsten carbide tool increases thread engagement length by 3x to 4x the original wall thickness, eliminating the need for rivet nuts, weld nuts, or heavy structural inserts.
Equipped with an integrated rim/collar cutters (flat-cut version), this tool forms the formed bushing while simultaneously milling off the raised collar ring in a single operation, resulting in a smooth, flush surface finish.
Key Technical Specifications & Features
- Precision Tool Geometry: Ø4.5 mm shank calibrated specifically for M5 cold-forming thread taps.
- Grade-A Tungsten Carbide Construction: High thermal resistance and hardness retain cutting edge integrity at temperatures exceeding 600°C–800°C.
- Integrated Flat-Cut Collar: Trims the displaced material displacement ring flush to the metal surface for seamless mating assembly.
- 100% Chip-Free Process: Zero scrap shavings or burrs, dramatically reducing post-processing and machine maintenance cleanup.
- High Production Speed: Typical hole cycle time completed within 2 to 4 seconds under standard CNC spindle speeds.
Applications & Material Compatibility
DUOMI thermal flow drill bits are engineered for high-throughput production environments across structural metalworking, automotive, aerospace, and HVAC sectors. Ideal application components include:
- Liquid cooling pipe systems and heat exchangers
- Automotive body-in-white (BIW) parts and seat frames
- Aerospace engineering brackets and thin-wall tubing
- Bicycle frames, stainless steel fixtures, and industrial lighting
- Bearing support structures and metal furniture joints
Workpiece Material Suitability
Compatible with standard, medium, and high-tensile metals including Iron, Zinc, Carbon Steel, Stainless Steel (304/316), Tool Steel, Inconel, Hastelloy, Aluminum Alloys, Titanium, Copper, Brass, and Bronze.
Operational Performance & Selection Guide
| Feature Parameter | Standard (Round) Type | Flat-Cut (Collar) Type (DM M5) |
|---|---|---|
| Bushing Surface Finish | Raised collar ring around entry | Milled, completely flush surface |
| Secondary Process | Requires deburring/milling | Integrated single-step trimming |
| Thread Contact Depth | 3x to 4x material thickness | 3x to 4x material thickness |
| Optimal Application | Standard structural tubing | Flush mating parts, sealed joints |
For custom machine integration, spindle speed calculations, or non-standard tool geometries, explore our CNC Drilling Machines or contact our engineering team.
Purchase & Delivery Guarantees
Direct Factory Assurance — Built, Tested, and Supported from Dongguan to Your Shop Floor
Runs on Your System
Standard GSK control (100% Fanuc G-code compatible) or optional Mitsubishi/Siemens. Direct CAD file import for code-free toolpath generation.
Factory Video FAT
Live drilling/tapping tests on your actual workpiece recorded before dispatch. Final 50% balance payment is paid only after your video approval.
40-Day Build & Rugged Crate
Guaranteed maximum 40-day manufacturing cycle. Sealed in anti-rust vacuum aluminum foil and bolted in fumigation-free timber crates (EXW/FOB/CIF).
Direct Engineer Care
Direct 1-on-1 WhatsApp group with your machine's build engineers, 12-month full warranty, and critical replacement parts dispatched via DHL within 24–48h.
Every DUOMI machine is built under a transparent 13-step factory production & responsibility chain.
Parameters
Download Technical Brochure| Thread Size | M5 |
| Diameter | Ø4.5 mm |
| Finishing | with Collar |
| Materials | Tungsten Carbide |
| Quality Grade | A |
| Brand | DUOMI ( DM ) |
Machining Samples
Real parts processed by our machines
Frequently Asked Questions
We “only” do drilling & tapping. Why do customers still choose Duomi over general-purpose CNC machines?
What does “Your part defines the solution” mean in practice?
What is the recommended spindle speed (RPM) and feed rate for the M5 Ø4.5mm thermal drill bit?
How does the collar-type thermal drill bit differ from a standard thermal drill bit?
What tap should be used after drilling with this DM Ø4.5mm bit?
What is the typical tool lifespan of a Grade-A tungsten carbide thermal drill bit?
Can these thermal drill bits be used on high-temperature alloys like Inconel and titanium?
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