Riveting — The Cold Connection in Jewellery Fabrication
Riveting — The Cold Connection in Jewellery Fabrication
Joining metal components with mechanical pins instead of solder or laser
Riveting is a mechanical joining technique in jewellery fabrication in which two or more components are joined by inserting a metal pin or wire — the rivet — through aligned holes and flaring or hammering its ends to lock the assembly. The process belongs to the cold-connection family alongside tabs, screws, and crimped settings, and is distinguished from soldering and laser welding by the absence of heat at the joint. Riveting is consequently appropriate where heat-sensitive materials, dissimilar metals, or production-line repeatability are at issue.
Form and fabrication
The basic rivet is a short length of round wire, typically the same metal as the components being joined or a softer compatible alloy. The rivet is sized to fit the drilled hole with a slight clearance, then trimmed to a length that allows enough material to form heads at both ends after flaring. The two ends are alternately tapped with a small hammer — usually a chasing hammer or a dedicated riveting hammer — until each end mushrooms into a domed head that overlaps the hole and locks the components together.
Flush rivets sit level with the surface of the work and are formed in a chamfered hole, with the rivet head pressed into the chamfer rather than standing proud. Domed rivets sit raised and are sometimes finished as decorative features in their own right. Star rivets are formed by a punch with a star-shaped face that leaves a decorative motif in the rivet head, used historically in armour and revived in contemporary designer work.
Cold connection and heat-sensitive materials
The principal practical advantage of riveting is the absence of heat. Stones already set in a component can be retained while the assembly proceeds, dissimilar metals such as silver and copper or platinum and gold can be joined without alloy diffusion, and materials that would not survive a torch — wood, leather, bone, plastic, set pearls, opal, organic gem materials — can be incorporated into the finished piece.
For studio jewellers working in the contemporary craft tradition, this expanded material vocabulary is one of the principal attractions of riveting. The result is a body of work — at its most developed in the work of designers such as Robert Ebendorf, Helen Britton, and Robert Smit — that combines metal with materials that solder cannot tolerate.
Anticlastic and constructed work
Riveting is also the canonical joining method for anticlastic and other forms of fabricated metalwork in which the components have been previously raised or formed into compound curves that would distort under the heat of soldering. Anticlastic work in particular relies on rivets to assemble pieces whose curvature has been worked in cold and would not survive an annealing cycle.
Industrial riveting at production scale uses pneumatic or hydraulic riveters to drive standardised rivets at high cycle rates. The principle is the same; the equipment is faster and more repeatable than hand riveting at the bench.
Tools and process
Hand riveting requires a small hammer with a slightly domed face, a riveting block or hardened anvil, a dimple punch for starting the head if required, and the standard bench saw, drill, and file equipment for preparing the components. The rivet wire should be slightly softer than the components being joined where possible, so the rivet deforms first under the hammer rather than the surrounding material.
Common errors in hand riveting include overlong rivets that buckle rather than mushroom under the hammer, oversized holes that allow the rivet to spin and weaken the joint, and undersized rivets that pull out under load. Practice on scrap material before committing to the finished piece is sensible.
In the trade
For commercial repair and fabrication, riveting is most often encountered in adjustments to existing pieces — replacement clasps, spring-bar fittings, hinged components — where heat would damage adjacent stones or finish. For studio and bespoke work, it is a stylistic choice as much as a technical one, and the visible heads of rivets on the finished piece are a deliberate design feature rather than a concession to fabrication constraint.