# Jewelry drills and burs

> Drills, the flex shaft and burs are used to pierce, cut and shape metal; bur shapes (ball, cylinder, cone), speeds and safety.

- Source: https://www.711grados.com/en/jewelry-drills-and-burs/
- Language: en
- Note: This entry was drafted with the help of AI and is pending review by the author.
- Published: 2026-08-20
- Updated: 2026-08-29
- Translation (es): https://www.711grados.com/es/taladros-y-fresas-de-joyeria/
- Author: Sandra Sánchez
- Site: 711 Grados (https://www.711grados.com/)

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The flex shaft (or hanging motor) drives small drill bits and burs that pierce, cut and shape metal. It is one of the most versatile tools in the workshop.

## Drill bit and bur

The **drill bit** makes holes; the **bur** removes or shapes metal. Burs are made of steel, tungsten carbide or with a diamond coating.

## Bur shapes

- **Ball:** for holes and stone seats.
- **Cylinder:** for flat recesses.
- **Cone and inverted cone:** for settings and bevels.
- **Flame:** for curved shapes.
- **Disc:** for cutting.

## Speed and lubrication

Each material and diameter needs its own speed. The bit is lubricated with wax to keep it from jamming or breaking.

## Safety

Secure the piece, wear safety glasses and keep hair and clothes tied back. Do not force the tool.

## See also

- [Jewelry spatulas and chisels](https://www.711grados.com/en/spatulas-and-chisels/)
- [Protective equipment for casting](https://www.711grados.com/en/casting-protective-equipment/)
- [Stone settings: types and how to choose](https://www.711grados.com/en/stone-settings-types/)