Item Name:
8mm Diamond Core Sintered Straight Drill Bits for Glass
SKU:
DB-S-8
Description:
The 8mm Diamond Core Sintered Straight Drill Bit for Glass is a diamond-coated core drill designed to cut clean, round holes in glass by grinding rather than chiseling. The cutting end is made with sintered diamond, meaning diamond abrasive is bonded throughout the working section for steady cutting and long service life when used correctly with coolant. This style of straight core bit is commonly used in coldworking for making holes in flat glass, fused work, blown forms, and thicker sculptural pieces when you need openings for hardware, hangers, tubing pass-throughs, or assembly points. The 8mm size is a practical middle ground for many studio needs, giving you a hole that’s large enough for common findings and small hardware without removing excessive material.
How it is used:
- Mark the hole location, then support the glass securely on a stable surface to prevent vibration and flex.
- Use water as coolant and lubrication while drilling to reduce heat and extend bit life.
- Start at a low speed with light pressure, letting the diamonds grind steadily instead of forcing the cut.
- Keep the bit perpendicular to the surface to maintain a round, clean hole and reduce edge chipping.
- Rinse and clean the hole after drilling, then lightly smooth edges if needed with a diamond hand pad or small grinding bit.
