Precision Flat Mouth Flow Drill Friction Drilling Bits
High-Speed Thermal Drilling Tooling for Chipless Bushing Formation in Sheet Metal and Tubing
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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: Advanced Friction Drilling Technology
The Flat Mouth Flow Drill Friction Drilling Bit from DUOMI CNC utilizes high-speed rotational thermal friction (1,500 – 3,500 RPM) to locally heat and plasticize metal workpieces, creating seamless, high-strength collars in seconds without cutting chips. The flat mouth profile simultaneously flattens and rims the top collar surface, delivering a clean, flush contact face ideal for immediate thread tapping or sealed fast-joint assemblies.
Key Technical Features & Capabilities
- Flat Mouth Collar Trimming: Integrated flat face cutter flattens the extruded top collar during the final downstroke, eliminating secondary facing operations.
- Chipless Metal Forming: Extrudes parent material into a robust cylindrical bushing, multiplying effective wall thickness by 3x to 4x.
- Extended Tool Service Life: Crafted from premium tungsten carbide alloys, providing over 10,000 to 15,000 forming cycles under optimal operational conditions.
- Rapid Processing Speed: Cycle times range between 2.0 and 6.0 seconds per hole depending on wall thickness (1.0 mm – 12.0 mm).
- Universal Machine Compatibility: Standardized parallel shank design fits seamlessly with standard CNC machining centers, drill presses, and dedicated automated production units.
Compatible Workpiece Materials
Our thermal friction drill bits process a broad range of conductive and ductile metals: - Mild Steel & Carbon Steel (S235, S355, Q235, 1020) - Stainless Steel (SUS304, SUS316) - Aluminum Alloys (6061, 6063, 5052) - Copper & Brass Alloys - Zinc, Iron, Titanium, and Precious Metals
Industrial Applications & Value Engineering
Friction drilling replaces costly rivet nuts, weld nuts, and threaded inserts across demanding structural industries: - Automotive & Transportation: Chassis frames, exhaust manifolds, and seat rail assemblies. - HVAC & Fluid Systems: Thin-wall manifold piping and heat exchanger header pipes. - Structural Engineering: Tubular steel frames, scaffolding systems, and solar mounting racks.
To optimize your manufacturing workflow, explore our compatible CNC Drilling Machines and specialized Thread Tapping Systems.
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.
Machining Samples
Real parts processed by our machines
