Fine adjustment screw

[1] Ultra-fine adjustment screws are used in applications requiring extremely fine motion, like laser alignment and fiber coupling.

Fine and ultra-fine adjustment screws are often used in photonics applications as part of purchased equipment such as mirror mounts, or built into lab-made apparatus.

Rigidity is crucial to ensure precision and reliability; thus, the material of choice for producing these screws is stainless steel, typically 18-8 (303).

At the tip of the screw, most commonly a stainless steel ball is either pressed or glued into place to provide a single point contact for the surface being moved.

In high-end adjusters where tight tolerances are required as well as the capability to withstand wear and higher load, phosphor bronze is the preferred material.