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Thin Wall Diamond Core Drills

TWDCD
  • Diameter sizes available from 4.5mm - 12mm
  • Wall thickness of between 0.4mm - 0.6mm

These electroplated diamond core drill bits have a thin wall in comparison with our standard diamond core drills. The thin wall allows for a more precise cut with a better surface finish and less chipping.  They should be used on delicate, hard materials such as optical glass, watch glass, sheet glass, thin glass, thin slices of stone, or any stone that is 6.5 or below on the Moh's scale of hardness.

Manufactured with a precision outer diameter for drilling a hole but the thin wall also allows for precision extraction of a core. The inner core diameter sizes are shown in the technical tab below along with drilling depths, shank sizes and more.

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Description

If you are a jeweller looking for diamond core drill bit sizes as small as 1mm - 3mm, please visit this page.

If you are using a hobby type rotary tool such as a Dremel, or a pendant drill you might like to try our Bottle Neck Diamond Core drills. These have a 2.35mm shank.

Drilling of all other hard materials can be done using our standard Diamond Core Drills.

Helpful Note: The diameter size indicated refers to the size of the hole you will end up with. If you are looking to achieve a core rather than drill a hole please see the technical tab for the internal diameter of each core drill.

Tip: Use with plenty of cold water, slow speed (5,000rpm) and low pressure

Helpful note: If you find the drill bit skittering across the surface of your work angle the drill to make the initial cut and then continue to drill vertically. 

Disclaimer. Using rotary tools near water has never been, to the best of our knowledge, endorsed by any of the rotary tool manufacturers. If you do choose to drill near water or with attachments under water connected to your drill then you do so at your own risk. Please be aware that mixing electricity and water can be very dangerous.


Technical

Diamond grit is precisely electroplated onto a steel shank

Sizes stated are +/- 0.1mm tolerance

4.5mm Diameter (+/- 0.1mm

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length: 45mm
  • Parallel shank: 4.2mm
  • Inner core diameter: 3.2mm

5.0mm Diameter

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length/drilling depth: 50mm
  • Parallel shank: 4.6mm
  • Inner core diameter: 3.6mm - 3.8mm

6.0mm Diameter

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length/drilling depth: 50mm
  • Parallel shank: 5.6mm
  • Inner core diameter: 4.8mm

6.5mm Diameter

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length/drilling depth: 50mm
  • Parallel shank: 6.2mm
  • Inner core diameter: 5.0mm

7.0mm Diameter

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length/drilling depth: 50mm
  • Parallel shank: 6.7mm
  • Inner core diameter: 5.6mm - 5.8mm

7.5mm Diameter

  • Wall thickness: 0.5mm - 0.6mm
  • Overall length/drilling depth: 50mm
  • Parallel shank: 5.5mm
  • Inner core diameter: 6.3mm - 6.5mm

8.0mm Diameter

  • Wall thickness: 0.5mm - 0.6mm
  • Overall length: 50mm
  • Shank: 5.5mm
  • Drilling depth: 30mm
  • Inner core diameter: 6.7mm

8.5mm Diameter

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length: 50mm
  • Shank: 5.7mm
  • Drilling depth: 30mm
  • Inner core diameter: 7.5mm

9.0mm Diameter

  • Wall thickness: 0.4mm - 0.5mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 8mm

9.5mm Diameter

  • Wall thickness: 0.5mm - 0.6mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 8.1mm - 8.2mm

10mm Diameter

  • Wall thickness: 0.4mm - 0.5mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 8.7mm - 8.9mm

10.5mm Diameter

  • Wall thickness: 0.5mm - 0.6mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 9.5mm - 9.7mm

11mm Diameter

  • Wall thickness: 0.5mm - 0.6mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 9.5mm - 9.8mm

11.5mm Diameter

  • Wall thickness: 0.4mm - 0.6mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 10mm

12mm Diameter

  • Wall thickness: 0.5mm - 0.6mm
  • Overall length: 50mm
  • Shank: 6mm
  • Drilling depth: 30mm
  • Inner core diameter: 10.5mm - 11mm

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