Diamond Wire Hollow Drill Bits

Diamond Wire Hollow Drill Bits – Clean, Chip-Free Holes in Glass, Stone & Tile

Our Diamond Wire Hollow Drill Bits deliver clean, chip-free holes in glass, stone, tile, porcelain, composites, resins, and delicate materials. The hollow-core design removes material from the center of the hole as you drill — reducing friction, heat buildup, and the risk of cracking brittle workpieces. Available in 11 sizes from 0.8mm to 4.0mm, sold in convenient 10-piece sets at $8.50 each, these bits are compatible with handheld rotary tools and drill presses for lapidary, jewelry, tile, and artisan craft applications.

🔥 Shop Diamond Wire Hollow Drill Bits – $8.50 / 10-Piece Set

Available Sizes

Diameter Pack Price Typical Application
0.80mm 10 pcs $8.50 Ultra-fine jewelry wire holes, bead drilling
1.0mm 10 pcs $8.50 Standard jewelry wire, fine stone drilling
1.25mm 10 pcs $8.50 Medium jewelry wire, glass bead holes
1.5mm 10 pcs $8.50 Heavier wire, pendant holes in stone
1.8mm 10 pcs $8.50 Jump ring holes, tile detail work
2.0mm 10 pcs $8.50 Standard pendant and tile drilling
2.5mm 10 pcs $8.50 Larger pendant holes, cord stringing
3.0mm 10 pcs $8.50 Thick cord, tile and stone installation
3.5mm 10 pcs $8.50 Large cord holes, decorative stone work
4.0mm 10 pcs $8.50 Maximum size, thick stone and tile drilling

Key Features

  • Hollow-core design — Removes core material during drilling for faster cutting and reduced heat
  • Diamond-coated cutting edge — Smooth, controlled cutting on hard and brittle materials
  • Chip-free results — Clean hole edges on glass, porcelain, and delicate stone
  • Versatile tool compatibility — Works with handheld rotary tools (Dremel, flex shaft) and drill presses
  • Water or oil cooling — Use with water or cutting oil for best results and maximum bit life

Compatible Materials

  • Glass — art glass, fused glass, stained glass, sea glass, beach glass
  • Stone — agate, jasper, quartz, marble, granite, slate
  • Tile — ceramic tile, porcelain tile, mosaic tile
  • Composites & resins — resin art, composite stone
  • Delicate materials — shells, eggshells, thin stone slabs

Related Tools

Frequently Asked Questions

  • Q: What size diamond wire hollow drill bit do I need for jewelry making?
    A: For standard 20-gauge jewelry wire, use a 0.8mm–1.0mm bit. For 18-gauge wire, use 1.0mm–1.25mm. For heavier 16-gauge wire or jump rings, use 1.5mm–2.0mm. Always drill slightly larger than the wire diameter to allow easy threading through the hole.
  • Q: How is a hollow drill bit different from a solid tip drill bit?
    A: A hollow drill bit has an open center that removes a small core plug as it drills, reducing friction and heat compared to a solid tip bit. This makes hollow bits faster, cooler-running, and less likely to crack brittle materials like glass and thin stone. Solid tip bits are better for very small diameters (under 0.5mm) where a hollow core is not practical.
  • Q: Should diamond wire hollow drill bits be used wet or dry?
    A: Always use wet. Drill in a shallow water puddle, use a water swivel adaptor for continuous flow, or apply water with a dropper during drilling. Water cools the diamond tip, flushes away debris, and dramatically extends bit life. Never run diamond drill bits dry — heat buildup will destroy the diamond coating rapidly.
  • Q: What drill speed should I use?
    A: Use low speed — 600–1,200 RPM for most stone and glass drilling. Apply light, steady pressure without forcing the bit. Let the diamond do the cutting. High speed and heavy pressure generate excess heat and wear the bit out quickly without improving drilling speed.
  • Q: Can these bits be used in a standard hand drill?
    A: Yes — diamond wire hollow drill bits with 1/8" (3mm) shanks are compatible with standard electric hand drills, drill presses, Dremel-style rotary tools, and flex shaft machines. Use a drill press or drill guide for the most accurate, perpendicular holes in stone and glass.