A complete aluminum extrusion RFQ checklist covering drawings, alloy, tolerances, finish, machining, quantity and delivery. This article helps engineers and buyers prepare practical requirements for custom aluminum components.
Start with controlled drawings
Provide a dimensioned cross section and finished-part drawing with revision level. Include 3D files when useful, but do not rely on 3D geometry alone for tolerances, threads or finish notes.
Material and mechanical requirements
State preferred alloy and temper or describe the performance requirement if selection is open. Identify structural loads, conductivity, corrosion exposure or appearance priorities that affect material choice.
Dimensions and tolerances
Mark functional datums and critical dimensions. Separate extrusion tolerances from machined tolerances. Include straightness, twist, flatness and cut-length expectations where they matter.
Secondary processing and finish
List cutting, drilling, tapping, CNC machining, welding, deburring, anodizing, powder coating and assembly. Define color, gloss, cosmetic faces, masking and packaging protection.
Commercial information
Include prototype quantity, production order quantity, annual demand, target delivery, shipping destination and required certifications. This allows tooling and production assumptions to be quoted clearly.
From Design Review to Quotation
Chengdacai supports custom aluminum extrusion, precision cutting, CNC machining, drilling, tapping, anodizing and powder coating. A complete drawing package lets the engineering team identify tooling, secondary operations and quality controls before production.
Explore our custom aluminum profiles, aluminum heatsinks, enclosure and frame profiles, or send your drawing for an engineering review.
Frequently Asked Questions
What files should be included with an RFQ?
Send dimensioned 2D drawings, available 3D files, revision level, alloy, finish, tolerances and quantity.
Can Chengdacai review manufacturability?
Yes. The engineering team can review extrusion, machining and finishing requirements before quotation.
How can quotation accuracy be improved?
Clearly identify critical dimensions, cosmetic surfaces, secondary operations, packaging and expected order volume.
Technical Review and Sources
Prepared by: Chengdacai Engineering Content Team
Technical review: Aluminum Extrusion and Machining Team
Last reviewed: August 2026
This guide is based on Chengdacai manufacturing experience and established aluminum engineering references. Project-specific dimensions, tolerances and performance requirements should be confirmed by drawing review and testing.
Related resources: Manufacturing Capabilities · Quality Control · RFQ Checklist
Get an Engineering Review and Quotation
Send your drawing, alloy, finish, tolerances and estimated quantity. Chengdacai can review extrusion, CNC machining and finishing requirements before quotation.
Upload Drawing and Request a Quote Download the Aluminum Extrusion RFQ Checklist (PDF)
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