Will these 0.4mm hex shank drill bits work in a regular corded drill?

These 0.4mm hex shank drill bits are primarily designed for impact drivers and CNC machines. While they can fit standard three-jaw keyless or keyed drill chucks by clamping the hex flats, their small size and specific application mean you must ensure your chuck can securely grip a 1/4" (3.175mm) shank and control the speed precisely to avoid breakage. For optimal results and safety, use with compatible impact drivers or CNC equipment.

What materials can these CoCud drill bits cut through?

These CoCud 0.4mm tungsten carbide drill bits are suitable for a range of materials including printed circuit boards (PCBs), acrylic, plastics, aluminum, soft metals, fiberglass, and wood. Their sharp cutting edge and durable construction ensure smooth drilling and accuracy on these surfaces. They are not intended for hard materials like concrete or thick steel.

How do I prevent these tiny drill bits from breaking?

The mini drill bits are delicate and easily twisted off. To prevent breakage, carefully control your CNC speed and ensure the chuck clamps the bit securely. The longer the clamping length, the better. If the clamping length is short, reduce the feed rate and cutting speed to minimize vibration and increase tool life. Proper handling is key for these precision tools.

How to buy original CoCud micro PCB drill bits in India?

To buy original CoCud micro PCB drill bits in India, source them from authorized US retailers and authorized brand partners like CrowCrowCrow. These bits are imported per-order, factory-sealed, and come with all customs duties and GST included in the price. They are shipped via ExpressBox with tracking for secure delivery to your Indian pincode.

Are these drill bits suitable for 1/4 inch impact drivers?

Yes, these drill bits feature a standard 1/4" (3.175mm) shank, making them compatible with most impact drivers and quick-change chucks. Their design is optimized for precise drilling in materials like PCBs and acrylic, ensuring they perform well in impact driver applications where controlled torque is applied.

CoCud 0.4mm PCB Drill Bits 1/8" Shank | Tungsten Carbide for CNC Engraving

Name: CoCud 0.4mm Micro PCB Drill Bits 1/8" Shank 38mm L | Tungsten Carbide for CNC Engraving Machines
Brand: CoCud
SKU: jyd0895
Price: 2777.00 INR
Availability: InStock

About this item

CoCud 0.4mm micro PCB drill bits provide exceptional precision for intricate electronic work and crafting. Featuring a 1/8" (3.175mm) shank and a sharp tungsten carbide cutting edge, these bits are engineered for smooth, accurate drilling on printed circuit boards, acrylic, plastics, aluminum, soft metals, fiberglass, and wood. They are ideal for use with PCB drilling machines, engraving machines, and CNC equipment, ensuring clean finishes without glitches.

The tungsten carbide material offers superior hardness, toughness, and wear resistance, allowing for higher operating speeds and efficient material removal. This results in low cutting force, reduced drilling heat, and enhanced tool life. The sharp cutting edge and large chip removal space contribute to precise drilling accuracy and prevent tool breakage, making them suitable for high-precision applications. The integrated positioning ring helps reduce machine set-up time.

For optimal performance and longevity, control CNC speed carefully and ensure a secure chuck clamp. These bits are designed for detailed work where precision is paramount. Imported from authorized US retailers, they offer a reliable alternative for Indian makers needing high-quality micro-drilling tools.

Key Features

PCB Drill Bits Size --- Cutting edge diameter (CED): 0.4mm / 0.016"; cutting edge length: 6.5mm / 0.256"; shank diameter: 3.175mm / 1/8"; overall length: 38mm / 1-1/2".
Wide Applications --- Widely used for drilling PCB (print circuit board), acrylic, plastics, aluminium, soft metal, fiberglass, wood, etc. Suitable for PCB drilling machines, engraving machines, CNC and high precision special drilling equipment.
Sharp Cutting Edge --- Sharp cutting edge provides smooth drilling, low cutting force and drilling accuracy to prevent tool breakage. Large chip removal space, smooth chip removal, and low drilling heat.
Tungsten Carbide --- Tungsten carbide tip has high hardness, good toughness, wear resistance, high strength, resistance to bending and heat resistance, providing a precise and easy experience.
Useful Tips --- The mini drill bit is too tiny and easily twisted off. Be careful and control your CNC speed. The longer the chuck clamps, the better. The positioning ring reduces machine set-up time and increase efficiency.

Why choose this product

Engineered for Precision Micro-Drilling

CoCud micro PCB drill bits are crafted for makers and professionals demanding accuracy in electronics and fine crafting. The 0.4mm tungsten carbide edge, paired with a 1/8" shank, delivers clean, precise holes on delicate materials like PCBs, acrylic, and soft metals. Unlike generic bits, these are optimized for CNC and engraving machines, ensuring efficient material removal and preventing tool breakage. Their high hardness and wear resistance mean consistent performance for detailed work, offering a reliable solution for intricate projects where precision is paramount.

Ideal for Hobbyists & Professionals

These bits are perfect for electronics hobbyists, PCB manufacturers, and CNC operators needing fine detail work. They excel with materials like PCBs, acrylic, plastics, aluminum, soft metal, fiberglass, and wood. If your work involves intricate circuit board drilling, small-scale engraving, or precise hole-making in delicate materials, these bits will meet your needs. However, they are not designed for heavy-duty construction or large-diameter drilling in hard materials like concrete or thick steel. For such tasks, a different bit type would be more suitable.

How to use

Secure the Bit — Insert the 1/8" (3.175mm) shank of the CoCud drill bit into your CNC machine, engraving machine, or impact driver's chuck. Ensure it is clamped securely by the jaws, using the full clamping length possible for stability.
Set Machine Parameters — For optimal performance and to prevent breakage, carefully control your machine's CNC speed and feed rate. Reduce speed and feed if clamping is short or vibration occurs, especially when drilling delicate materials like PCBs or acrylic.
Drill with Precision — Drill vertically into your target material (PCB, acrylic, soft metal, wood). The sharp cutting edge and large chip removal space will ensure smooth, accurate holes with minimal heat buildup and clean chip evacuation.

Example scenarios

Typical situations where CoCud 0.4mm Micro PCB Drill Bits 1/8" Shank 38mm L | Tungsten Carbide for CNC Engraving Machines helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

A hobbyist in Bangalore needs to drill precise holes for a custom Arduino project on a PCB.

How this product helps

These 0.4mm CoCud tungsten carbide bits ensure clean, accurate holes without damaging the delicate PCB traces. The 1/8" shank fits standard CNC and engraving machine chucks, allowing for controlled drilling essential for small-scale electronics assembly.

Scenario 2

Illustrative example

Where it helps

A maker in Delhi is working with acrylic for a display case and needs to drill small, clean holes without cracking the material.

How this product helps

The sharp cutting edge and smooth chip removal of these bits provide precise drilling in acrylic, minimizing the risk of material stress or cracking. Their tungsten carbide construction ensures durability for multiple projects.

Specifications & installation

Specifications

Primary Cutting Material	Tungsten Carbide
Shank Material	High Speed Steel (HSS)

Installation & usage

Recommended Applications	PCB, acrylic, plastics, aluminum, soft metal, fiberglass, wood
Compatible Machines	PCB drilling machines, engraving machines, CNC, high precision special drilling equipment
Usage Tips	Control CNC speed carefully; ensure secure chuck clamp. Reduce feed rate/speed if clamping length is short to minimize vibration and increase tool life.
Cost per use	20 bits at ₹2,777 — ₹139 per bit
Shelf life after opening	12 months (for tools, assuming proper storage)
Contraindications	Not for heavy-duty construction, concrete, or thick steel drilling.
Allergens / common irritants	N/A (Tool)

How we compare

Feature	CoCud 0.4mm Micro	Others
Cutting Edge Material	Tungsten Carbide	Varies (HSS, Carbide, sometimes coated)
Shank Diameter	1/8" (3.175mm)	Typically 1/8" or 3mm for micro bits
Cutting Edge Diameter	0.4mm	Varies, often 0.3mm to 1.0mm
Precision for PCBs	High precision, smooth drilling, low heat	Variable; quality depends on brand and specific bit
Cost per bit (approx.)	₹139 per bit	₹50 - ₹150 per bit (for comparable micro bits)

SKU	jyd0895
Brand	CoCud
Cutting Edge Diameter (CED)	0.4mm (0.016")
Cutting Edge Length	6.5mm (0.256")
Shank Diameter	3.175mm (1/8")
Overall Length	38mm (1-1/2")
Shank Material	High Speed Steel (HSS)
Cutting Edge Material	Tungsten Carbide
Flute Type	Spiral
Finish Type	Uncoated
Color	Purple
Unit Count	20 Pieces (2 Sets)
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

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CoCud 0.4mm Micro PCB Drill Bits 1/8" Shank 38mm L | Tungsten Carbide for CNC Engraving Machines

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