Q
What do the cross-sectional dimensions in the table refer to?
The cross-sectional dimensions refer to the width and height of a square bar or profile measured in millimeters (mm). For example, a 10×10 dimension means the bar is 10 mm wide and 10 mm tall.
Q
What do the tolerance values (e.g., ±0.1, ±0.2) mean?
Tolerances indicate the allowable deviation from the specified dimension during manufacturing. For instance, a tolerance of ±0.1 mm means the actual dimension can be up to 0.1 mm larger or smaller than the nominal size and still be within acceptable quality standards.
Q
Why do larger cross-sectional sizes have higher tolerances?
Larger profiles are more challenging to manufacture with the same level of precision as smaller ones due to material behavior, tooling limitations, and thermal expansion during processing. As a result, slightly wider tolerances are permitted for larger dimensions to maintain practical and cost-effective production.
Q
What are the standard length ranges, and can custom lengths be ordered?
Standard lengths range from 100 mm to 1000 mm for smaller sizes (3×3 to 10×10), and from 100 mm to 500 mm for larger sizes (15×15 and 20×20). Custom lengths outside these ranges may be available upon request — please contact us for specific requirements.
Q
Why is the maximum standard length shorter for 15×15 and 20×20 sizes?
Larger cross-sectional profiles are heavier and more susceptible to warping or structural stress over longer lengths. Limiting the standard length to 500 mm for these sizes helps ensure dimensional stability, easier handling, and consistent quality during shipping and application.
Q
Which size should I choose for my application?
The right size depends on your specific application requirements, including load-bearing needs, fitting constraints, and precision demands. Smaller sizes (3×3 to 6×6) are ideal for precision components and light-duty applications, while larger sizes (10×10 to 20×20) are better suited for structural or heavy-duty uses. If unsure, our technical team can assist you in selecting the most appropriate dimension.
