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DM M3 Ø2.7mm Long Thermal Drill Bits with Collar for Metalwork

DM M3 Ø2.7mm Long Thermal Drill Bits with Collar for Metalwork

CNC Drilling & Tapping Machine

High-Accuracy Thermal Drill Bits DM M4 Ø3.7mm for CNC Drilling

DM M5 Ø4.5mm Collar-Type Thermal Drill Bits for Industrial Use

Model: M3 Ø2.7mm Long Round / Grade A

Function: DM Ø2.7 mm with collar for M3 cold forming tap

Application Materials: Iron, Zinc, Steel, Stainless Steel, Tool Steel, Inconel, Hastelloy, Aluminum, Carbide, Titanium, Tungsten, Tantalum, Copper, Brass, Bronze, Platinum etc.

Feature

Precision thermal drill bits built for clean hole forming and strong bushing creation on steel, stainless steel, and aluminum materials.

Lead time (days) : 7 to 10 working days. (Standard Configuration)

Tip: Our CNC drilling and tapping machines support custom non-standard designs, machine color customization, and OEM branding. Start now to purchase and customize your own equipment, please contact us.

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See how it works – watch the video

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Technical specification

Thread Size

M3
Diameter

Ø2.7 mm
Finishing

with Collar
Materials

Tungsten Carbide
Brand

DUOMI ( DM )
Quality Grade

A

Introduction

Engineered for high-efficiency forming, DM thermal drill bits allow chip-free hole creation with extended thread depth. Standard bits produce a collar, while flat types cut it away. These bits boost productivity in welded assemblies, exchangers, bearing supports, and stainless structures. They are widely used in cars, bicycles, heating systems, and modern metal-building applications.

Key benefits

How to Select the Right Thermal Flow Drill Bit
Thermal flow drill bits are divided into Standard (Round) and Flat-Cut (Planed) versions.
Standard Round: Creates a drawn-out bushing and leaves a raised ring.
Flat-Cut: Forms the same bushing but mills off the raised ring for a flush surface.

Why Choose DM Thermal Drill Bits?
Chip-free forming and strong, durable threading.
Clean processing—no debris handling.
High-precision collar formation.
Suitable for many tapping systems.
Fast operation and long lifespan for boosted efficiency.
Works with a wide range of thermal-drillable metals.

Best Use Cases
Applications needing extended threads
Welded components and heat exchangers
Bearing support parts
Stainless steel fixtures and metal furniture joints

Key Industries
Automotive parts
Bicycle components
Stainless steel fixtures
Aerospace engineering
Heating equipment manufacturing
Industrial lighting
Mechanical and metal building structures
Surface finishing and coating
Liquid cooling pipe systems

Customer Testimonials

Martin Keller
★★★★★
Germany
" We switched to DM flow-drill bits last year and never looked back. The tool life is outstanding and the holes are perfectly extruded every time. The best thermal drill bits for industrial shops. "
Jacob Thompson
★★★★★
USA
" Great performance! These thermal drilling tools form strong bushings without cracking the material. DM flow-drill bits outperform everything we used before. "
Sofia Ramirez
★★★★★
Mexico
" DM thermal drill bits give us clean, accurate holes on aluminum frames. No chips, no mess, and incredibly stable temperature control. Perfect tools for high-volume production. "
Oliver Bennett
★★★★★
United Kingdom
" The consistency of these flow-drill bits is unmatched. Perfect extrusion height and excellent wear resistance. DM thermal drilling tools are worth the investment. "
Derek Wilson
★★★★★
Canada
" These thermal drilling tools produce strong sleeve-like holes without secondary processing. DM flow-drill bits reduced our cycle time by 40%. Excellent quality. "
Arjun Patel
★★★★★
India
" We use DM thermal drill bits for large batch orders. Zero failure rate and very long lifespan. These thermal drilling tools have become our factory standard. "
Chris Evans
★★★★★
Italy
"Durable, efficient, and precise—this CNC drilling machine has been a valuable addition to our workshop!"
Ahmad Yusuf
★★★★★
Indonesia
" DM flow-drill bits are extremely reliable. The hole forming on steel frames is always clean and precise. Perfect for automotive parts manufacturing. "
Emilia Novak
★★★★★
Poland
" High stability, no burrs, and very strong threaded sleeves. These thermal drill bits perform better than the German brands we used before. Very impressive tools. "
Samuel Okoro
★★★★★
Nigeria
" Our metal fabrication team loves DM thermal drilling tools. Smooth forming and long service life. These flow-drill bits help us achieve excellent accuracy. "