DM M3 Ø2.7mm Long Flat Thermal Friction Drill Bits
Industrial tungsten carbide flow drilling tools engineered for high-speed, chipless metal bushing forming and thread creation.
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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.
Flat-Mouth Flush Seating: Produces a clean, flat counterbored rim ideal for flush fastener seating without raised collars.
In-Depth Engineering Description & Technical Overview
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Overview & Thermal Drilling Principle
DM M3 Ø2.7mm Long Flat Thermal Friction Drill Bits utilize high rotational speed and axial force to generate friction heat, localizing temperature up to 600°C–800°C to superplasticize thin metal substrates. As the tungsten carbide tool penetrates, it forms a precise bushing up to 3 to 4 times the original sheet thickness without producing chips or material waste.
The Flat (Planed) Type design simultaneously cuts away the raised surface rim, leaving a completely flush, smooth finish ideal for high-precision mating surfaces, fluid line connectors, and aesthetic structural joints.
Key Advantages of DUOMI Thermal Friction Drill Bits
- 100% Chipless Hole Forming: Eliminates chip accumulation, reducing post-processing cleanup and preventing tool jam in automated production lines.
- Superior Thread Strength: Material is reshaped rather than cut, preserving grain structure and increasing pull-out strength by up to 300% for subsequent M3 thread tapping.
- Precision Surface Planing: The flat collar cutter leaves a perfectly level face for flush hardware assembly and leak-proof sealing surfaces.
- High Productivity & Extended Tool Life: Manufactured from ultra-fine grain tungsten carbide, achieving operating cycle times under 2–4 seconds per hole with service life reaching 5,000–10,000 holes depending on substrate thickness.
- ISO 9001 Quality Compliant: Designed to strict manufacturing tolerances (±0.02mm) to ensure repeatable CNC production accuracy.
Industrial Applications
DUOMI M3 Ø2.7mm thermal friction drill bits are heavily utilized across demanding manufacturing sectors requiring strong thread engagement in thin-walled tubing and sheet metals:
- Automotive & Aerospace: Fluid tubing, bracket mountings, and lightweight frame structures.
- Electronics & Liquid-Cooling Systems: Cold-plate fluid paths, heat exchangers, and enclosure fastenings.
- Furniture & Architectural Hardware: Stainless steel joints, lighting enclosures, and structural tubing.
- HVAC & Piping: Thin-walled heat exchanger manifolds and central heating liquid lines.
Operational Parameters & Machine Compatibility
Compatible with standard high-speed CNC milling centers, automated drill presses, and special-purpose tapping machines. Recommended rotational speed for M3 Ø2.7mm in steel/stainless steel ranges between 2,400 RPM and 3,200 RPM, with controlled axial feed rates.
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 | M3 |
| Diameter | Ø2.7 mm |
| Finishing | Plane Surface |
| Materials | Tungsten Carbide |
| 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 primary difference between standard and flat type thermal friction drill bits?
What spindle speeds and power requirements are recommended for an M3 Ø2.7mm friction drill bit?
Which materials can be processed using thermal friction drill bits?
How does thermal drilling increase thread load capability in sheet metal?
Can these bits be integrated into standard CNC machining centers?
Is release paste or lubrication required during thermal friction drilling?
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