405U49 Metal Drill Bit 2mm: The Complete Buyer's Guide for Worldwide Sourcing
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The 405U49 Metal Drill Bit 2mm is a small-diameter twist drill designed for accurate, low-torque drilling in ferrous and non-ferrous metals, plastics, and softwoods. It is commonly used for pilot holes, PCB work, and light fabrication where standard 1/4 in bits are too large.
A 405U49 metal drill bit 2mm is a 2 mm diameter high-speed steel (HSS) twist drill with a 2 mm shank, used for precision pilot holes and small-diameter drilling in metal, plastic, and wood. It is not a masonry or cable-installer bit; for those applications, choose a dedicated DEWALT masonry bit or an EAGLE TOOL US cable installer bit.
What is a 405U49 Metal Drill Bit 2mm used for?
This bit is used for drilling 2 mm holes in sheet metal, aluminium, brass, plastics, and thin wood. Typical tasks include pilot holes for screws, PCB mounting, instrument panel work, and light maintenance. It is not intended for concrete, brick, or deep-hole production drilling.
How does a 2mm metal drill bit work?
The bit's flutes lift chips out of the hole while the point angle (commonly 118° or 135°) centres the bit on the workpiece. A 2 mm bit removes very little material per revolution, so it demands high spindle speed and low feed pressure. Excessive speed without lubrication can overheat and dull the cutting edges quickly.
405U49 Metal Drill Bit 2mm specifications
| Attribute | Typical value |
|---|---|
| Drill bit diameter | 2 mm (0.0787 in) |
| Shank diameter | 2 mm (0.0787 in) |
| Material | High-speed steel (HSS) |
| Point angle | 118° (standard) or 135° (split point) |
| Flute type | Standard spiral |
| Coating | Bright, black oxide, or TiN (varies by supplier) |
| Overall length | Approx. 49 mm (1.93 in) — verify with supplier |
| Application | Metal, plastic, wood |
Note: The "405U49" designation is a supplier or catalog reference. Always confirm exact dimensions, coating, and point angle with your distributor before ordering.
Types of small-diameter drill bits and their applications
Small-diameter bits fall into three broad families: twist drills for metal and plastic, masonry bits for concrete and brick, and installer bits for routing cable through framing. Each family has distinct geometry and shank designs.
- Twist drills (HSS): General-purpose metal, plastic, and wood drilling. The 405U49 2 mm bit belongs here.
- Masonry bits: Carbide-tipped for concrete, brick, and block. DEWALT offers 3-flat shank masonry bits in sizes from 1/8 in to 7/8 in.
- Cable installer bits: Long, flexible bits with serrated points for pulling wire through studs. EAGLE TOOL US makes 1/4 in and 1/2 in versions.
How to choose the right drill bit for your application
- Match the bit to the material. Use HSS twist drills for metal and plastic; carbide-tipped masonry bits for concrete and brick; installer bits for cable routing.
- Confirm the diameter and shank. A 2 mm bit needs a chuck or collet that closes to 2 mm. Larger chucks may not grip small shanks securely.
- Check the point angle. 118° suits general metalwork; 135° split-point bits resist walking on hard or curved surfaces.
- Consider coating. TiN or black oxide coatings extend life in abrasive or high-heat applications; bright finish is fine for light duty.
- Evaluate duty cycle. For production drilling, choose cobalt or coated HSS; for occasional maintenance, standard HSS is sufficient.
- Verify availability and lead time. Small-diameter bits are often sold in packs; confirm pack quantity and worldwide shipping terms.
Product comparison: drill bits available from 3G Electric
| Product | Type | Diameter | Shank | Overall length | Best for |
|---|---|---|---|---|---|
| DEWALT 3-Flat Shank Drill Bit Set (7-piece) | Twist drill set | 1/2 in, 1/4 in, 3/8 in, 3/16 in, 5/16 in | 3-flat shank | Varies by size | General metal, wood, plastic |
| DEWALT 1/8 in Masonry Drill Bit 25-Pack | Masonry | 1/8 in | 3-flat shank | 3 in | Concrete, brick, block |
| DEWALT 1/4 in Masonry Drill Bit 25-Pack | Masonry | 1/4 in | 3-flat shank | 6 in | Brick, block, concrete |
| EAGLE TOOL US 1/4 in Cable Installer Drill Bit | Installer | 1/4 in | Round | 18 in | Metal & plastic studs, cable routing |
| EAGLE TOOL US 1/2 in Cable Installer Drill Bit | Installer | 1/2 in | Round | 18 in | Metal & plastic studs, conduit |
Step up to a larger set or a masonry/installer bit when your work moves beyond small-diameter metal drilling. For production environments, consider coated or cobalt bits for longer life.
Why source 405U49 Metal Drill Bit 2mm from 3G Electric?
3G Electric stocks 34+ products across drilling, masonry, and cable installation categories, backed by 35+ years of industrial supply experience. We provide technical support, worldwide delivery, and export documentation for international buyers. Whether you need a single 2 mm bit or a bulk order of DEWALT masonry bits, we help you specify the right tool for the job.
According to DEWALT Drill Bit Selection Guide, 2023: "For drilling in metal, use high-speed steel drill bits and apply steady pressure with the correct speed to avoid overheating."
Frequently asked questions
Q: What is the 405U49 Metal Drill Bit 2mm used for?
A: It is used for drilling 2 mm holes in metal, plastic, and wood. Typical applications include pilot holes, PCB work, and light fabrication. It is not suitable for concrete or masonry.
Q: How do I choose between a 2 mm twist drill and a masonry bit?
A: Choose a 2 mm HSS twist drill for metal, plastic, and wood. Choose a carbide-tipped masonry bit for concrete, brick, or block. The materials are not interchangeable.
Q: Where can I buy 405U49 Metal Drill Bit 2mm in Worldwide?
A: 3G Electric supplies 405U49-compatible 2 mm drill bits and related DEWALT and EAGLE TOOL US products worldwide. Contact us for quotes, lead times, and export documentation.
Q: What is the difference between a 118° and 135° point angle?
A: A 118° point is standard for general metal drilling. A 135° split point resists walking on hard or curved surfaces and is preferred for stainless steel and precision work.
Q: Can I use a 2 mm drill bit in a standard drill chuck?
A: Yes, if the chuck closes to 2 mm or smaller. Many standard chucks have a minimum capacity of 1/16 in (1.6 mm), so a 2 mm shank will fit. For best accuracy, use a collet or drill press.
Key takeaways
- The 405U49 Metal Drill Bit 2mm is a precision HSS twist drill for small holes in metal, plastic, and wood.
- Match bit type to material: twist drill for metal, masonry bit for concrete, installer bit for cable routing.
- Confirm diameter, shank size, point angle, and coating before ordering in bulk.
- 3G Electric offers worldwide delivery, technical support, and export documentation for international buyers.
- For larger or masonry drilling, step up to DEWALT 3-flat shank bits or EAGLE TOOL US installer bits.
Ready to order or need sizing help? Contact 3G Electric for quotes, technical support, and worldwide shipping on 405U49 Metal Drill Bit 2mm and related drilling products.
