Enlarge, flare, and shape your holes with this 3.3 mm Maillefer conical diamond drill bit, which is particularly useful for stones and hard materials.
Its conical shape sets it apart from a conventional drill bit: it is particularly useful for gradually enlarging an opening, creating a slight flare, shaping the edge of a hole, or drilling a cavity that widens toward the surface. Its 3.3 mm diameter allows you to work on relatively large areas while taking advantage of the abrasive action of the diamond coating. Diamond tools are suitable for hard materials such as gemstones, glass, ceramics, or porcelain.
Note: When using a diamond drill bit to drill into a stone, the stone must be kept submerged in water at all times to prevent it from overheating during drilling. Be careful when drilling: only the diamond drill bit should come into contact with the water. The Dremel tool must not touch the water.
What is its practical use in jewelry making?
After making a small hole in a stone, use the tapered end to gradually widen the opening, correct the shape, or create a larger opening to accommodate a bail, a post, or another mounting component. It can also be used to carve a decorative cavity or carefully refine an edge. For gemstones, follow the precautions outlined in our guide on how to drill a gemstone: work gradually, cool with water, and avoid excessive pressure. This type of accessory is used with a rotary tool such as the Dremel 3000 with accessories.
Whether you’re working on a stone for the first time or looking to perfect your finishes, don’t try to achieve the final size in a single pass. The conical shape is particularly useful for working gradually and precisely controlling the resulting width.
Details:
Length: 44.5 mm
Head diameter: 3.3 mm
Shaft diameter: 2.3 mm
Sold per 1 piece
