38mm Extra-Long Electroplated Diamond Thin-Wall Drill Bit – 10mm Shank for Gemstones & Glass

These extra-long electroplated diamond thin-wall drill bits are designed for precision drilling in gemstones, jade, agate, glass, ceramics, and other hard, brittle materials. Featuring a thin-wall construction, uniform diamond coating, and an extended drilling length, they are ideal for deep-hole drilling and applications requiring high dimensional accuracy.

With a nominal wall thickness of only 0.5 mm, these drill bits help minimize material loss while delivering clean, precise holes. The extended design provides additional drilling depth for workpieces that cannot be drilled effectively with standard-length bits.

Key Features

• Extended Drilling Length: Overall length of 80 mm or more, with an effective drilling depth of approximately 57–60 mm.
• Thin-Wall Design: Approximately 0.5 mm wall thickness helps reduce material waste and minimize drilling resistance.
• Uniform Diamond Coating: Consistent electroplated diamond coverage supports stable cutting performance and extended tool life.
• High Drilling Precision: Clean hole edges and reduced chipping when operated under suitable conditions.
• Smooth Drilling Performance: Narrow cutting wall reduces resistance and facilitates debris removal.
• Versatile Applications: Suitable for gemstones, jade, agate, glass, ceramics, porcelain, and other hard, brittle materials.

Specifications

• Drill Diameter: 38 mm
• Shank Diameter: 10 mm
• Effective Drilling Depth: 57–60 mm
• Overall Length: 80 mm or longer
• Nominal Wall Thickness: 0.5 mm
• Weight: 95 g
• Bond Type: Electroplated Diamond

Instructions for Use

1. Use an appropriate rotational speed for the drill diameter and workpiece material.
2. Apply light, consistent feed pressure. Avoid excessive force.
3. Always use water cooling where compatible to control heat and flush away drilling debris.
4. Allow the diamond cutting surface to engage the material gradually.