Lothee 30 Pcs Shank Tungsten Carbide Micro Drill Bits Set, Tungsten Steel PCB Print Circuit Board Flute CNC Router Bits for Rough Stone Print Circuit Board Jewelry Engraving (0.1-3.0 mm)

Description

Product Overview

The Lothee 30‑piece shank tungsten carbide micro drill bit set is engineered for high‑precision machining across a wide range of materials. Constructed from premium alloy steel shanks and hardened tungsten carbide tips, each bit maintains rigidity while resisting wear, bending, and heat buildup during extended use. The set covers diameters from 0.1 mm up to 3.0 mm, providing a comprehensive solution for delicate PCB drilling, intricate jewelry engraving, and fine stone work. The spear‑point geometry combined with a single‑flute spiral design reduces cutting resistance, delivering smooth, burr‑free holes even at high spindle speeds. All bits are uncoated, allowing the carbide surface to interact directly with the workpiece for optimal material removal and heat dissipation.

Technical specifications include a straight shank type for secure collet engagement, a 118‑degree cutting angle for aggressive material removal, and a 1‑flute configuration that maximizes chip evacuation. The package dimensions of 5.67 × 4.76 × 0.63 inches and a lightweight 3.52‑ounce total weight make storage and transport effortless. With a best‑seller rank of #1 in the Circuit Board Drill Bits category, this set has earned a solid 4.3‑star rating from over 700 verified customers, reflecting its reliability and performance in demanding applications.

Usage

Designed for both hobbyists and professional technicians, the Lothee micro drill bits excel in a variety of environments. In electronics workshops, the ultra‑fine 0.1‑0.5 mm tips enable precise via creation on densely packed printed circuit boards, reducing the risk of trace damage and improving signal integrity. For artisans crafting fine jewelry, the 0.6‑2.0 mm sizes allow intricate engraving of precious metals and gemstones, achieving detail that rivals hand‑crafted work. The robust carbide composition also makes the set suitable for drilling into hardened plastics, acrylics, and even soft stone such as amber or agate, where clean entry and minimal chipping are essential.

When used with CNC routers or desktop milling machines, the straight shank ensures a stable connection to standard collets, minimizing run‑out and vibration. The anti‑vibration blade design further stabilizes the cutting process, delivering consistent results across long production runs. Whether you are prototyping a new electronic device, repairing a damaged board, or creating custom engraved accessories, these bits provide the accuracy and durability required for repeatable, high‑quality outcomes.

Why Choose Us

Choosing the Lothee micro drill bit set means investing in a product that combines superior material science with thoughtful engineering. The tungsten carbide tips are sourced from reputable suppliers and undergo rigorous heat‑treatment processes to achieve a hardness rating that exceeds industry standards, ensuring each bit retains its cutting edge even after thousands of holes. The alloy steel shank is machined to tight tolerances, providing a perfect fit for most 1/4‑inch and 1/8‑inch collet systems, which reduces the likelihood of slippage and improves overall machining stability.

Beyond raw performance, Lothee stands behind its products with a comprehensive quality assurance program. Every batch is inspected for dimensional accuracy, tip integrity, and surface finish before packaging. Customers benefit from responsive after‑sales support, including technical assistance for optimal tool selection and usage tips. In addition, the set’s mixed‑color packaging helps users quickly identify the appropriate size, streamlining workflow and minimizing downtime.

Environmental responsibility is also a core value. The manufacturing process minimizes waste and utilizes recyclable packaging materials, aligning with sustainable practices while delivering a premium product. By selecting Lothee, you receive not only a high‑performance toolset but also a partner committed to continuous improvement and customer satisfaction.

Key Features

• Premium tungsten carbide tips deliver long‑lasting sharpness and resistance to wear.
• Spear‑point and single‑flute spiral design reduce cutting force for smoother, burr‑free holes.
• Wide size range (0.1‑3.0 mm) covers PCB, jewelry, plastic, and soft stone applications.
• Straight alloy steel shank ensures secure collet fit and minimizes vibration.
• Dedicated customer support and technical guidance included with every purchase.

FAQ

What materials can these drill bits safely cut?

The bits are designed for PCB copper traces, printed circuit board substrates, soft metals used in jewelry, acrylic, polycarbonate, and soft stones such as amber or agate. They are not recommended for hardened steel or abrasive materials.

How do I prevent the bits from breaking during high‑speed drilling?

Use a moderate spindle speed (10,000‑15,000 RPM) and apply light feed pressure. Ensure the workpiece is securely clamped and use proper coolant or air blast to clear chips. The spiral flute helps evacuate debris, reducing heat buildup.

Can I use these bits with a standard 1/4‑inch collet?

Yes, the straight shank is compatible with most 1/4‑inch and 1/8‑inch collet systems found on desktop CNC routers, drill presses, and handheld rotary tools.

Do the bits come pre‑lubricated or coated?

All bits are uncoated to allow direct contact between the carbide tip and the material, which maximizes cutting efficiency. For extended life, you may apply a light cutting oil or use air cooling during operation.

What is the warranty period for this set?

Lothee offers a one‑year limited warranty covering manufacturing defects. If a bit fails due to a defect, contact customer service for a replacement or refund.