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| Outer Diameter | Inner Diameter | Height | Outer Diameter Tolerance | Inner Diameter Tolerance | Height Tolerance |
|---|---|---|---|---|---|
| 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 in the table represent?
A
The outer diameter refers to the total external measurement of the part, while the inner diameter refers to the size of the internal bore or hole. Both values are listed in millimeters (mm) and define the overall dimensional range of the component.
Q
Why do some outer diameter sizes have multiple inner diameter options?
A
Multiple inner diameter options are provided to accommodate different application requirements. For example, an outer diameter of 80mm can be paired with inner diameters of 50, 60, or 70mm, giving customers flexibility in selecting the wall thickness that best suits their use case.
Q
How are the tolerance values applied to the dimensions?
A
Tolerances are expressed as ± values in millimeters. For instance, a tolerance of ±0.2mm means the actual dimension can be 0.2mm larger or smaller than the specified nominal value. Larger components generally carry higher tolerance values due to manufacturing constraints.
Q
Why do height tolerances differ from outer and inner diameter tolerances for larger sizes?
A
For larger components (e.g., outer diameters of 150mm and above), the height tolerance is tighter than the diameter tolerances. This is because height precision is often more critical for stacking, assembly, or load-bearing performance, and can be controlled more accurately during the manufacturing process.
Q
Can custom dimensions outside of this specification table be manufactured?
A
Yes, custom dimensions beyond the listed specifications may be available upon request. Please contact our technical team with your specific requirements, including desired outer diameter, inner diameter, height, and tolerance needs, and we will assess feasibility and provide a tailored solution.
Q
What is the height range for each size, and can a specific height be requested?
A
Each outer diameter size has a defined height range — for example, an outer diameter of 20mm supports heights from 5mm to 20mm. Within this range, specific heights can typically be requested. Please consult with our team to confirm availability for your desired height within the applicable range.