Flat Surface Shock Valve Shims for Reliable Valve Response

Q: How do you measure and guarantee surface flatness?

We use 2D optical gauge measurement to verify planarity. Shims are checked against the specified flatness tolerance (typically within a few microns) on a sampling basis per AQL standards. For critical applications, 100% inspection can be arranged. Flatness certification data is included in the inspection report.

Q: What is the difference between photo etching and stamping for shim production?

Photo etching (chemical etching) is a burr-free, stress-free process ideal for ultra-thin materials (0.02mm+) and complex geometries with fine features. Stamping is more cost-effective for thicker materials and higher volumes. We recommend the optimal process based on your material, thickness, geometry, and volume requirements.

Q: Can you produce shims with non-round shapes?

Yes. We manufacture hexagon, oval, rectangle, square, and fully customized shapes. Photo etching is particularly well-suited for complex profiles, while stamping excels at high-volume production of simpler geometries. Provide your drawing for a process recommendation.

Q: What is the minimum hole diameter you can produce?

Our minimum open hole diameter is 0.1mm, with a minimum line/land width of 0.08mm. These capabilities are achieved through our photo etching process. For stamping, minimum feature sizes depend on material thickness and are evaluated on a case-by-case basis.

Q: Do photo-etched shims have the same mechanical properties as stamped shims?

The base material properties are identical — the difference is in the manufacturing method. Photo etching does not introduce work hardening or residual stress at the cut edge, which can actually be advantageous for fatigue-sensitive applications. Post-processing heat treatment can be applied to either method to achieve target mechanical properties.