Lobster Clasp Production Process
The production of lobster clasps on Ciemmeo machinery is carried out through a structured and coordinated process.
Unlike simple components, lobster clasps require high-precision forming, accurate assembly and controlled soldering to ensure long-lasting functionality.
The Ciemmeo production line is divided into multiple phases, starting from flat stock and progressing through shell forming, trigger manufacturing and final assembly.
Each phase is performed by a dedicated machine, designed to guarantee repeatability, efficiency and consistent quality of the finished clasp.
1st Phase
Stamping of the clasp shell
PS2S
The first phase starts from flat stock, which is fed into a high-precision PS2S coining and stamping press.
Through a multi-stage die, the machine forms, shapes and cuts a symmetrically stamped piece that will become the clasp shell once folded and soldered.
All functional elements of the clasp—such as seats, walls and pivot points—are created at this stage.
Extreme precision is essential, as these features directly determine the reliability and long-term performance of the lobster clasp.
2nd Phase
Production of the clasp trigger
PS2S
In parallel, a second PS2S press processes a smaller flat stock to produce the trigger of the clasp.
This operation forms the trigger profile and creates the dedicated seat for the spring, which is critical for smooth and reliable movement.
The process is fully automatic, requiring only material loading and part collection, while maintaining tight dimensional tolerances and consistent output.
3rd Phase
Forming and soldering
of the clasp shell
PSMA
The stamped shell blanks are loaded onto the PSMA forming and soldering unit.
Here, the shells are cut from the strip, folded into shape and automatically soldered closed.
Soldering can be performed using laser welding or gas flame, depending on production requirements.
Laser welding ensures higher speed, minimal deformation and maximum alloy purity, while gas soldering offers flexibility for different production setups.
4th Phase
Assembly of the lobster clasp
MAMA1 – MIM2 – MAM
Once shells and triggers are ready, they are assembled together with the spring to create a fully functional lobster clasp.
Ciemmeo offers semi-automatic and fully automatic solutions, allowing manufacturers to scale production according to volume needs.
In automatic mode, machines such as MIM, MAM and MAMA1 handle spring production, insertion, assembly and functional testing.
Each clasp is tested multiple times before discharge, ensuring only compliant pieces reach the final container.
Why a complete lobster clasp line matters
Using a complete Ciemmeo production line allows full control over dimensions, tolerances, assembly accuracy and output speed.
From flat stock to finished clasp, every phase is optimised to reduce handling, improve consistency and guarantee long-term reliability.
The result is a flexible production system that can evolve from semi-automatic to fully automatic, delivering high-quality lobster clasps for professional jewellery manufacturing.
