What to Include in a CNC Machined Aluminum Bracket RFQ

1. Provide both 3D CAD and a controlled 2D drawing

Use a STEP file or another widely readable 3D format for geometry, and include a 2D drawing for dimensions, datums, tolerances, threads, finish, and inspection notes. Mark the revision level on both files. If the model and drawing differ, state which document controls the quotation.

Identify critical-to-function features

Highlight mounting faces, locating holes, bearing fits, connector interfaces, and any features that affect alignment. A supplier can then distinguish functional tolerances from general tolerances instead of pricing every surface as a high-precision feature.

2. State the exact aluminum alloy and temper

“Aluminum” is not enough for a production quotation. Specify the alloy and temper, such as 6061-T6 or 7075-T6, and note any alternative material that may be acceptable. Strength, machinability, corrosion resistance, finishing response, and material availability can all affect cost and delivery.

If the part will be anodized, powder coated, chemically converted, or bead blasted, include the required color, thickness, masking areas, and cosmetic standard. Explain whether electrical conductivity, grounding, or a mating fit must be preserved after finishing.

3. Define quantities and demand expectations

List prototype quantity, first production quantity, and estimated annual demand where available. Quantity affects fixture strategy, machine loading, material purchasing, inspection planning, and whether a repeat-order process should be established. If demand is uncertain, say whether the first order is a pilot or a production release.

4. Separate general and critical tolerances

Include a general tolerance standard for non-critical dimensions, then identify the small number of dimensions that control fit or alignment. Add GD&T where appropriate and define the datum structure. Also specify thread class, hole size limits, flatness, perpendicularity, or surface roughness only where the application needs them.

For high-risk parts, request a first article inspection, dimensional report, material certificate, or finish certificate. The required report should be agreed before production rather than after shipment.

5. List threads, inserts, and supplied hardware

Call out thread standard, size, depth, class, and whether the thread is blind or through. Identify helicoils, press-fit inserts, dowel holes, captive hardware, or customer-supplied components. For each insert, specify the approved part number or performance requirement and state whether installation is included in the quotation.

6. Confirm packaging and delivery requirements

State the destination country and city, requested delivery window, shipping terms, labeling needs, and packaging constraints. Machined aluminum brackets can be scratched or dented if parts are packed without separators or protective film. If parts must arrive as kits or with traceable labels, include this in the RFQ.

Daremotion can coordinate export packaging and international freight through a logistics partner. Freight cost and delivery terms should be shown separately so the buyer can compare manufacturing cost and landed cost clearly.

7. Include NDA and CAD confidentiality requirements

If the design is confidential, request an NDA before sending sensitive files or state that an NDA must be signed before quotation. Define who may access the drawings, how revisions are controlled, and whether subcontracted finishing or inspection partners may see the data. This creates a clear IP-protection expectation at the start of the project.

8. Ask focused quotation questions

• Can the supplier complete a DFM review before final pricing?
• Which features require a fixture, multiple setups, or special tooling?
• What production tolerance range can be maintained consistently?
• Which inspection documents and samples are included?
• What is the estimated lead time for samples and repeat production?
• Are prototype or small-batch quantities accepted?
• Which finish, packaging, and shipping options are available?

For more design guidance, read our article on designing CNC machined aluminum brackets for industrial automation. You can also review our precision CNC machining capabilities and the application page for CNC machined aluminum brackets.

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