Cast Aluminum Control Arms

BestPro manufactures custom cast aluminum control arms and related suspension components to your drawings. From casting and heat treatment to CNC machining and inspection, one project team manages the complete process from first samples to repeat production.

Custom Aluminum Suspension Components

Our manufacturing scope includes:

Custom upper and lower aluminum control arms

Aluminum wishbone control arms

Cast aluminum suspension arms

Custom aluminum trailing arms and radius arms

Aluminum suspension links and connecting arms

Custom cast aluminum steering knuckles

Aluminum suspension brackets and bushing housings

OEM automotive aluminum suspension castings

All components are manufactured to customer drawings rather than supplied as standard aftermarket parts.

Built Around Functional Requirements

Cast aluminum control arms are load-bearing suspension components. Its reliability depends on the material, casting integrity, heat treatment and accuracy of its machined interfaces.

Before production, we review:

Component geometry and wall thickness

Material and heat-treatment requirements

Machining allowances and locating datums

Bushing bores, ball-joint locations and mounting faces

Critical dimensions and inspection requirements

Annual volume and order quantity

If casting is not suitable for the design or application, we will point this out during the technical review rather than simply quote the drawing.

Casting and CNC Machining

Depending on the design and volume, we can evaluate gravity casting, low-pressure casting and other suitable aluminum casting processes.

Common alloys such as A356 and AlSi7Mg can be supplied in the specified heat-treatment condition. The final alloy and temper will follow the approved drawing or customer specification.

After casting and heat treatment, critical features are CNC machined, including:

Bushing and sleeve bores

Ball-joint mounting features

Chassis mounting faces

Bolt holes, threads and counterbores

Assembly datums and locating surfaces

Bushings, sleeves and threaded inserts can also be included when a more complete assembly is required.

By planning the casting and machining together, we can reserve suitable machining stock and establish reliable locating points for repeat production.

Inspection of Critical Features

Inspection can be arranged according to your project requirements:

Material & Heat Treatment

Material certificates, heat-treatment records and hardness results.

Dimensional Inspection

Critical dimensions and assembly interfaces checked by conventional equipment or CMM.

Additional Testing

Mechanical-property, X-ray or dye-penetrant testing when required.

Traceability

Part marking and batch records maintained according to the agreed quality plan.

First samples can be inspected and submitted for approval before batch production. BestPro operates under an ISO 9001 quality management system.

From Samples to Repeat Production

01 — Drawing Review

Review of CAD files, material, critical dimensions, quantities and inspection requirements.

02 — Tooling & Samples

Tooling preparation and production of initial machined castings.

03 — Inspection & Approval

Sample inspection, customer review and completion of agreed corrections.

04 — Repeat Production

Approved tooling, fixtures and inspection points applied to subsequent batches.

For supplier-transfer projects, existing samples, inspection reports and known quality issues can also be reviewed.

One Contact for the Complete Project

BestPro coordinates casting, heat treatment, CNC machining, finishing and inspection, giving you one technical contact for engineering questions, sample approval, production updates and quality documentation.

Request a Project-Specific Quote

Send us your 2D drawing, 3D model, required material and estimated quantities. Our engineers will review the manufacturing route and quality requirements for your cast aluminum control arms before preparing the quotation.