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Standard Dimensional Specifications & Tolerances
| Outer Diameter (mm) | Inner Diameter (mm) | Height (mm) | Outer Diameter Tolerance (mm) | Inner Diameter Tolerance (mm) | Height Tolerance (mm) |
|---|---|---|---|---|---|
| 20 | 10 | 5～20 | ±0.2 | ±0.2 | ±0.2 |
| 30 | 15 / 20 | 5～30 | ±0.2 | ±0.2 | ±0.2 |
| 40 | 20 / 30 | 5～30 | ±0.2 | ±0.2 | ±0.2 |
| 50 | 30 / 40 | 5～50 | ±0.3 | ±0.3 | ±0.3 |
| 60 | 40 / 50 | 5～50 | ±0.3 | ±0.3 | ±0.3 |
| 80 | 50 / 60 / 70 | 10～60 | ±0.3 | ±0.3 | ±0.3 |
| 100 | 60 / 80 / 90 | 10～80 | ±0.5 | ±0.5 | ±0.5 |
| 120 | 80 / 100 | 10～80 | ±0.5 | ±0.5 | ±0.5 |
| 150 | 100 / 120 | 10～100 | ±0.8 | ±0.8 | ±0.5 |
| 200 | 150 / 180 | 10～120 | ±1.0 | ±1.0 | ±0.8 |
| 250 | 200 / 220 | 10～120 | ±1.2 | ±1.2 | ±0.8 |
| 300 | 250 / 280 | 10～150 | ±1.5 | ±1.5 | ±1.0 |
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Frequently Asked Questions
Q
What do the outer diameter and inner diameter values represent in this specification table?
A
The outer diameter refers to the total external measurement of the component, while the inner diameter refers to the bore or hole size through the center. Multiple inner diameter options listed for a single outer diameter indicate that different bore sizes are available for the same outer shell dimension.
Q
Why do the tolerance values increase as the outer diameter gets larger?
A
Larger dimensions inherently involve greater material volume and more complex manufacturing processes, which introduce slightly wider acceptable deviation ranges. This is standard practice in precision machining and conforms to international dimensional tolerance standards such as ISO 286.
Q
Can I request a custom height outside the listed height range?
A
The height ranges listed (e.g., 5～20mm, 10～150mm) represent our standard production capabilities. For heights outside these ranges, please contact us directly to discuss custom manufacturing options, as special tooling or processes may be required.
Q
Are tighter tolerances available for precision applications?
A
Yes. The tolerance values shown in the table represent our standard manufacturing tolerances. For applications requiring tighter dimensional control — such as aerospace, medical, or high-precision mechanical assemblies — we can accommodate tighter tolerances upon request, subject to technical feasibility and pricing adjustments.
Q
How should I select the correct inner diameter for my outer diameter?
A
Selection depends on your application's wall thickness requirements and load-bearing needs. For example, an outer diameter of 80mm is available with inner diameters of 50, 60, or 70mm — resulting in wall thicknesses of 15mm, 10mm, or 5mm respectively. Choose based on the structural strength and fit requirements of your design.
Q
What materials are these components available in?
A
The dimensional specifications in this table apply across a range of available materials. Please refer to our material selection guide or contact our technical team to confirm which materials are compatible with your chosen dimensions and tolerance requirements.