Custom bracelet and chain link design in CAD gives jewelers and designers precise control over pieces that must move, flex, and close securely. Unlike a ring, a bracelet is made of moving parts: links, hinges, and clasps that all need correct clearances to work after casting and finishing. At eCadCam, our jewelry services team designs and prepares bracelets for casting in Los Angeles. Here is how we approach it.
Types of Custom Bracelets
- Link bracelets: repeating links connected by jump rings or integrated connectors.
- Cuff bracelets: open, rigid bands that slip over the wrist.
- Bangles: closed, rigid circles, sometimes hinged to open.
- Hinged bangles: rigid bracelets with a hinge and a hidden clasp.
- Tennis bracelets: a line of set stones connected by small, flexible links.
- ID and nameplate bracelets: a central plate with chain on both sides.
Each style raises different design challenges, especially around movement and sizing.
Designing Links That Move Freely
Links must have enough clearance between them to articulate without binding, yet not so much that the bracelet looks loose or gappy. Casting and polishing remove a small amount of material, and surfaces can be slightly rough before finishing, so we design clearances with the whole production process in mind.
There are two common approaches:
- Cast-in-place links: links are designed interlocked and printed together as one assembly. This saves assembly time but requires generous clearances and careful sprue planning.
- Individually cast links: each link is cast separately and assembled with jump rings or soldered connections. This gives more control and is common for production.
Clasps: Security and Ease of Use
The clasp is the part people interact with every day. Common options include box clasps with a safety latch, lobster clasps, toggle clasps, and hidden clasps on hinged bangles. A box clasp designed in CAD can match the style of the links so the closure disappears into the design. We always plan a secondary safety (figure-eight latch or side lock) for valuable pieces.
Hinges for Bangles and Cuffs
Hinges must be strong, smooth, and accurately aligned. In CAD we model the knuckles and pin hole so the hinge pin fits correctly after casting. Hinge areas usually need extra metal for durability, and the opening angle should allow the bracelet to slip on comfortably.
Sizing a Bracelet
Bracelet size depends on wrist circumference and preferred fit, whether snug or loose. Rigid bangles must pass over the hand, so they are sized by the widest part of the hand rather than the wrist. Link bracelets can include extra links or an extender. In CAD, changing the size is straightforward, especially when the design is built parametrically.
Weight and Cost
Bracelets can use a lot of metal. CAD lets us estimate weight before casting and adjust thickness, hollow sections, or open up the design to control cost, especially for gold and platinum pieces.
Stones in Bracelets
Tennis bracelets and set-stone designs require precise seats for every stone and links that flex without loosening settings. Consistent stone sizes and spacing are much easier to achieve in CAD than by hand.
Prototype Before Casting
A printed resin prototype lets you check articulation, clasp function, and fit on the wrist before committing to precious metal. It is a small step that prevents expensive mistakes.
Design Your Bracelet in Los Angeles
eCadCam has more than 22 years of experience in jewelry CAD, wax printing, and casting preparation. Visit us at 4212 San Fernando Rd, Glendale, CA 91204, call 213.489.1173, or request a quote for your custom bracelet.