Understanding Steel Ball Grades: What Does G10, G20, G100 Mean?

Introduction
Steel ball grades define precision levels. Understanding these grades is essential for selecting the right product.
What Is a Ball Grade?
A grade indicates:
- Diameter tolerance
- Roundness
- Surface finish
Lower number = higher precision
Common Grades
| Grade | Description |
|---|---|
| G10 | Ultra precision |
| G20 | High precision |
| G100 | General industrial |
Why Grade Matters
High Precision Applications
Require:
- G10–G20
Used in: - Aerospace
- Medical
Standard Applications
Use:
- G50–G100
For: - General machinery
Impact on Performance
Higher grade =
- Lower friction
- Better accuracy
- Longer lifespan
Conclusion
Choosing the right grade ensures optimal performance without unnecessary cost.

About the Author
We are SD Ball, a professional manufacturer dedicated to delivering high-precision steel ball solutions worldwide. With years of expertise, we specialize in advanced production processes, strict quality control, and customized solutions to support diverse industrial applications. From material selection to final inspection, we provide reliable products and consistent performance to help our clients achieve higher efficiency, durability, and product quality.
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