What will be affected by the dimensional tolerances in the project?

Tolerances decide whether your profiles fit together, align at assembly, and look straight — so they affect fit, function, and finish, not just numbers on a drawing.

About the Author

Alistair Leung — Senior Technical Sales Engineer, 13 years in furniture aluminum extrusion.

What dimensional tolerances can you hold, and which standard do you inspect to?

I hold tolerances to the applicable standard you specify and inspect every batch with gauges before shipment.

Which tolerance and inspection standards do you follow (GB/T 5237, EN 755)?

I work to the standard that applies to your product and market — different customers, products, and regions call for different specifications, so I confirm the applicable standard with you up front rather than assuming one. That commonly means GB/T 5237 or GB/T 6892 for China, EN 755-9 for Europe, or your own drawing tolerance. Whatever standard we agree on, I record it in the contract and inspect to exactly that reference.

How do you control and inspect twist, bow, and cut-length accuracy?

I control twist and bow at the press and during straightening, then check them with straightedges and feeler gauges per batch. Cut-length accuracy is handled on our CNC saws, and I verify lengths with calibrated measuring tools. Every shipment gets a pre-delivery inspection against the agreed tolerance, and I keep the records so you can trace any batch back to its production lot. This is how we keep assembled joints clean and consistent.

Can you provide mill test certificates or third-party inspection reports?

Yes. I provide mill test certificates for the alloy and temper, and we support third-party inspection such as SGS on request. If your project needs dimensional reports, I can include measured tolerance sheets for key dimensions with the shipment. Tell me what your buyer or quality team requires, and I will build it into the quotation and the inspection plan so there are no surprises at receiving.

Technical Details

About Us

We are Guangdong Nice Aluminum Products Co., Ltd. — a furniture aluminum profile factory in Zhaoqing, Guangdong with 13 years, 200 staff, and 2,000 tons monthly output. We inspect to your applicable standard and hold ISO 9001, CE, and RoHS. Send me your drawing — I will reply within 24 hours.

FAQ

Author Credentials

Alistair Leung — 13 years in aluminum extrusion for furniture. I have managed 500+ custom dies and 3,000+ export shipments for furniture brands worldwide.