A millegrain wheel is the hand tool used to apply millegrain (also spelled milgrain) — the continuous row of tiny beads that appears along the edges of bezel settings, ring shanks, and other decorated surfaces in fine jewellery. The tool consists of a small, finely toothed rotating wheel mounted at the end of a handle, with the wheel typically replaceable to allow different bead sizes and spacings to be produced from the same handle. The jeweller rolls the wheel under controlled pressure along the metal surface, and the teeth impress a series of evenly spaced beads as the wheel turns.

Construction and selection

The wheel itself is a small disc, usually no more than a few millimetres in diameter, with the teeth precision-cut along the circumference. Wheels are sold in graded sizes — most makers offer a series running from very fine (suited to small bezels and delicate work) through coarser sizes for heavier bands and larger frames. The teeth may be square or round in cross-section depending on the desired bead profile. Quality matters: a well-made wheel produces a uniform, sharp bead pattern; a worn or poorly cut wheel produces inconsistent depth and spacing that show in the finished work.

The handle holding the wheel is shaped to the jeweller's grip and weighted to allow steady, controlled pressure. Some modern shops use motorised millegrain tools that drive the wheel through a flexible shaft, allowing more uniform pressure than hand work; the trade view on whether motorised application can fully replicate hand-applied millegrain is divided, with some makers preferring the controlled imperfection of hand work for vintage-revival pieces.

Application technique

The metal to be milgrained should be properly prepared — work-hardened sufficiently to take a clean impression but not so hard that the wheel skips or fails to bite. The wheel is positioned at the start of the run with the teeth engaged at the desired depth, and rolled along the line under steady downward pressure. Speed and pressure must remain constant; variation produces visible discontinuity in the bead pattern. The run is closed by careful management of the start-and-end seam, often by completing the circumference with the wheel and then dressing the join with a single careful pass.

Oppi Untracht's Metal Techniques for Craftsmen documents the tool and technique in detail, and remains a standard reference for the goldsmithing tradition that continues to use the millegrain wheel as a daily bench tool.

Other names

The tool is also called a beading wheel, a bead tool, or in older British usage simply a milgrain. The American spelling milgrain and the French-derived millegrain are both current; the techniques and tools are identical.

Further reading

• Ganoksin — millegrain wheel and technique
• GIA — bench tools and goldsmithing references
• International Gem Society — jewellery techniques