Tolerance & Precision Tables
Comprehensive guide to machining tolerances, precision capabilities, and quality standards
Precision Manufacturing Standards
Our tolerance tables provide comprehensive reference data for various manufacturing processes. From standard machining tolerances to specialized precision requirements, find the exact specifications for your project.
CNC Tolerances
Standard and precision machining capabilities
Molding Tolerances
Injection molding precision standards
PM & MIM
Powder metallurgy tolerance ranges
3D Printing
Additive manufacturing precision levels
CNC Machining Tolerances
Standard tolerance ranges for different materials and processes
Standard Machining Tolerances (ISO 2768-m)
| Dimension Range (mm) | Linear Tolerance (mm) | Angular Tolerance | Flatness (mm) | Surface Roughness (Ra) |
|---|---|---|---|---|
| ≤ 6 | ±0.1 | ±1° | 0.05 | 1.6-3.2 |
| 6 - 30 | ±0.1 | ±30' | 0.05 | 1.6-3.2 |
| 30 - 120 | ±0.15 | ±20' | 0.1 | 1.6-3.2 |
| 120 - 400 | ±0.2 | ±10' | 0.15 | 3.2-6.3 |
| 400 - 1000 | ±0.3 | ±5' | 0.2 | 3.2-6.3 |
Material-Specific Precision Capabilities
Aluminum Alloys
Steel Alloys
Titanium Alloys
Geometric Dimensioning & Tolerancing (GD&T)
Injection Molding Tolerances
Comprehensive tolerance standards for plastic injection molding
Standard Molding Tolerances
| Dimension (mm) | Commercial | Precision |
|---|---|---|
| < 25 | ±0.15 | ±0.05 |
| 25 - 50 | ±0.20 | ±0.08 |
| 50 - 100 | ±0.25 | ±0.10 |
| 100 - 150 | ±0.30 | ±0.15 |
| > 150 | ±0.40 | ±0.20 |
Material-Specific Tolerances
Powder Metallurgy & MIM Tolerances
Precision capabilities for powder metal and metal injection molding
Conventional PM
Metal Injection Molding
Metal 3D Printing
Quality Standards & Certifications
Our precision capabilities meet international quality standards
International Standards
Measurement Equipment
Download Complete Tolerance Reference
Get our comprehensive PDF reference guide with detailed tolerance tables, GD&T symbols, and quality standards.
Complete Tolerance Tables
Comprehensive reference guide
GD&T Reference Guide
Symbols and applications
Quality Control Checklist
Inspection and verification
Need help with tolerance specifications?
Tolerance FAQs
Common questions about manufacturing tolerances
What tolerance should I specify for my parts?
Start with the loosest tolerance that meets your functional requirements. Tighter tolerances increase costs significantly. Standard tolerances (±0.1mm) work for most applications.
How does material affect achievable tolerances?
Material properties like hardness, thermal expansion, and machinability affect achievable tolerances. Softer materials generally allow tighter tolerances than harder materials.
What's the difference between standard and precision tolerances?
Standard tolerances (±0.1mm) are suitable for most applications. Precision tolerances (±0.005mm) require specialized equipment and processes, with significantly higher costs.
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