Buyer note: confirm assumptions before quoting
Lead time, MOQ, yield, leak-test scope, machining scope, and landed cost depend on the drawing, alloy, inspection plan, annual volume, and destination market. For current supplier facts, review the supplier capability sheet or send an RFQ package.
# Automotive Suspension Bracket RFQ Package: Bore Datums, Mount Faces, PPAP and FAI Records
Automotive suspension bracket and shock absorber housing RFQs need more than a casting price. Bore datums, mount faces, bracket interfaces, heat treatment, CMM points, X-ray or section-review scope, PPAP, FAI, and traceability can change the supplier's real quote.
This checklist is for sourcing, SQE, and engineering buyers preparing A356-T6 or ZL114 suspension-related aluminum casting RFQs where the supplier must understand inspection evidence before tool release or second-source review.
Useful Bohua routes:
- •Automotive suspension bracket RFQ for drawing-ready quote submission.
- •Shock absorber housing product proof for representative casting context.
- •A356-T6 suspension casting guide for process and alloy review.
- •Anonymized shock absorber platform quality case for quality-discipline context without customer-name inference.
- •Quality control and inspection evidence when buyers need CMM, material, heat-treatment, or sample-record context.
Separate the part family from a generic bracket quote
A suspension bracket, strut housing, or shock absorber housing should not be quoted like a simple mounting bracket when the drawing depends on bore alignment, mount-face flatness, bolt-pattern position, heat-treatment stability, or approval records.
State:
- •part family: shock absorber housing, strut housing, suspension bracket, platform support, or adjacent chassis mount
- •whether the RFQ is for a new tool, transfer tool, second source, or production recovery review
- •material target such as A356-T6, ZL114, or buyer-approved equivalent
- •which faces, bores, and bracket interfaces control assembly
- •whether PPAP, FAI, run-at-rate, or customer-specific documents are required
If drawings are confidential, state NDA-first review and share non-sensitive context first: part family, alloy target, annual volume, approval scope, and contact path.
Define bore datums and mount faces before comparing suppliers
Use this table in the RFQ package:
| RFQ field | What to define |
|---|---|
| Bore ID | Bore diameter, tolerance, machining stock, surface finish, datum reference, and CMM points |
| Mount faces | Flatness, parallelism, machining scope, coating or masking, and inspection frequency |
| Bracket interfaces | Bolt pattern, boss height, rib transitions, mating-part notes, and assembly load context |
| Datum scheme | Primary, secondary, and tertiary datums for machining and final inspection |
| Fatigue-sensitive zones | Ribs, bosses, wall transitions, fillets, and section changes that need review |
| Heat treatment | A356-T6, ZL114, hardness, material record, and distortion-sensitive areas |
| Approval records | FAI, PPAP level, CMM layout, material certificate, heat-treatment record, traceability, and sample plan |
The goal is not to prove drawing performance from a checklist. The goal is to make every supplier quote the same inspection and approval scope.
Inspection records to request
Suspension-related casting RFQs often need records that connect casting, heat treatment, CNC machining, and final inspection.
Useful records may include:
- •first article dimensional report
- •CMM report for bore, mount faces, bolt pattern, and datum relationships
- •material certificate and alloy record
- •heat-treatment record if A356-T6 or ZL114 heat treatment is specified
- •hardness or tensile record if the drawing or buyer standard requires it
- •X-ray, section review, or other internal-quality review when the buyer defines the method and acceptance
- •PPAP or FAI package when required by the buyer's approval process
- •traceability format and lot-control expectation
- •packaging inspection for machined faces, bores, and coated surfaces
Do not ask for every possible document by default. Ask for the records that match the drawing risk and the buyer's approval process.
Supplier questions before unit-price comparison
Ask each supplier:
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- •Which bore or mount-face features drive fixture and machining risk?
- •Which datum scheme will be used for CNC and final CMM inspection?
- •Does the quote include heat-treatment record and material certificate?
- •Which X-ray, section-review, or internal-quality checks are included, if any?
- •Is PPAP or FAI included, excluded, or quoted as a customer-specific scope?
- •How will machined faces and bores be protected during packaging and export?
- •Which supplier assumptions would change if this becomes a second-source or transfer-tool project?
This keeps supplier comparison focused on drawing risk, inspection evidence, and approval workload instead of only the lowest casting price.
How to use the anonymized case context
Bohua's AI-assisted shock absorber platform quality case can support supplier qualification discussion because it shows production-line quality tracking and improvement discipline.
Use it as adjacent evidence only:
- •do not infer or name the customer
- •do not treat one case as a guarantee for a new drawing
- •do not assume the same inspection plan applies to a different part
- •use the case to ask better questions about data capture, line management, and record discipline
Copy-paste RFQ starter
> Automotive suspension bracket or shock absorber housing RFQ
> Files: 2D PDF rev __, STEP __, NDA-first review yes/no __
> Part family: shock absorber housing / strut housing / suspension bracket / platform support
> Material: A356-T6 / ZL114 / supplier recommendation
> Process: gravity casting / low-pressure casting / need recommendation
> Critical features: bore ID __, mount faces __, bracket interfaces __, bolt pattern __
> Datum scheme: primary __, secondary __, tertiary __
> Heat treatment: required yes/no __, record required yes/no __
> Inspection: CMM __, material certificate __, hardness/tensile __, X-ray or section review __
> Approval: FAI __, PPAP level __, traceability __, customer-specific forms __
> Packaging: bore protection __, machined face protection __, export destination __
> Volume: prototype __, annual __, MOQ target __
> Timing: tooling __, samples __, production release __
FAQ
What should buyers send for a suspension bracket or shock absorber housing RFQ?
Send 2D and 3D drawings, part-family context, material target, annual volume, tooling status, bore and mount-face requirements, datum scheme, machining scope, inspection needs, and whether PPAP, FAI, or traceability records are required.
Which inspection records matter most for shock absorber housing castings?
The most common records are CMM reports for bores, mount faces, bolt patterns, and datums; material certificates; heat-treatment records; first article reports; and X-ray, section review, PPAP, or FAI only when required by the buyer specification.
Should PPAP or FAI be requested before quotation?
Yes if the buyer's approval process requires it. PPAP or FAI scope should be visible before quotation because document level, dimensional layout, sample quantity, traceability, and customer-specific forms can affect cost and timing.
How should bore datums and mount faces be defined in the RFQ package?
Mark the datum scheme, bore tolerance, machining allowance, mount-face flatness, bolt-pattern relationship, surface finish, and CMM points on the drawing or in an RFQ note so suppliers quote the same machining and inspection scope.
Can an anonymized case study support supplier qualification?
Yes, but only as adjacent quality-discipline evidence. It can help buyers ask about process monitoring, data capture, and record control, but it should not be used to infer a customer name or guarantee a result for a new drawing.
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