Choosing the correct shim thickness is critical for achieving accurate alignment, spacing, and performance in mechanical and precision assemblies. Whether you need 0.01mm ultra thin shims or thicker options like 0.05mm or 0.1mm, selecting the right thickness depends on your application, tolerance requirements, and assembly conditions. This guide explains how to choose shim thickness and the typical applications for different thickness ranges.

Why Shim Thickness Matters

Shim thickness directly affects:

• Alignment accuracy 
• Clearance control 
• Mechanical performance 
• System stability 

👉 Even a small difference (e.g., 0.01mm) can significantly impact precision assemblies.

Common Shim Thickness Options

🔹 0.01mm – Ultra Thin Shim

• Micro adjustment 
• High precision applications 
• Minimal spacing requirement 

🔹 0.05mm – Medium Thin Shim

• Standard precision adjustment 
• Widely used thickness 
• Balance between flexibility and strength 

🔹 0.1mm – General Purpose Shim

• Structural spacing 
• Less sensitive tolerance requirements 
• Higher strength support 

How to Choose Shim Thickness

When selecting shim thickness, consider the following:

✔ Required Tolerance

• High precision (±0.002–0.01mm) → 0.01–0.05mm 
• Standard tolerance → 0.05–0.1mm 

✔ Assembly Function

• Fine alignment → thinner shim 
• Load support → thicker shim 

✔ Available Clearance

• Limited space → ultra thin shim 
• Larger gap → thicker shim 

✔ Adjustment Method

• Fine tuning → multiple thin shims 
• Fixed spacing → single thicker shim 

Typical Applications by Thickness

🔹 0.01mm Shims

• Optical alignment 
• Sensor positioning 
• Precision instruments 

🔹 0.05mm Shims

• Electronic assemblies 
• Mechanical adjustment 
• General precision systems 

🔹 0.1mm Shims

• Industrial machinery 
• Automotive systems 
• Structural spacing 

Single Shim vs Shim Stack

✔ Single Shim

• Simple installation 
• Stable structure 
• Suitable for fixed spacing 

✔ Shim Stack (Multiple Layers)

• Flexible adjustment 
• Fine tuning capability 
• Easy to modify thickness 

👉 Engineers often use shim combinations to achieve precise results.

Material & Process Considerations

Thickness selection also depends on:

✔ Material

• Stainless steel → strong, corrosion-resistant 
• Brass / copper → softer, specific applications 

✔ Manufacturing Process

• Etching → best for ultra-thin (0.01–0.1mm) 
• Laser cutting → medium thickness 
• Stamping → standard parts 

👉 Ultra thin shims are best produced by chemical etching.

Common Selection Mistakes

Avoid these common mistakes:

• Choosing too thick → cannot achieve precise adjustment 
• Choosing too thin → insufficient strength 
• Ignoring tolerance → misalignment issues 
• Not considering installation method 

👉 Proper selection improves both performance and lifespan.

Custom Shim Thickness Solutions

We provide custom shim thickness solutions:

• Ultra thin shims (down to 0.01mm) 
• Tight tolerance control 
• Custom sizes and shapes 
• Support for small batch and mass production 

👉 Our team can help you select the optimal thickness for your application.

CTA

👉 Not sure which shim thickness is right for your project?
Send us your requirements or drawings, and we will recommend the best solution.

FAQ

Q1: What is the most commonly used shim thickness?
A: 0.05mm is widely used as a standard precision thickness.

Q2: Can I combine multiple shims?
A: Yes, stacking shims is a common method for fine adjustment.

Q3: What is the thinnest shim available?
A: Typically 0.01mm, depending on material and process.

Q4: Which process is best for ultra thin shims?
A: Chemical etching is recommended for high precision thin shims.