Leaf Spring for BMW 3 Series: Ceramic Composite
This leaf spring for the BMW 3 Series is specified around ceramic composite, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is a supplier who changed material without saying so, or inconsistent hardness between lots. Both are specification problems, and both are preventable.
Specification
| Product | Leaf Spring |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Ceramic Composite |
| Typical use | Rural Transport |
| MOQ | 500 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | CCC |
| Packing | 50 pieces per inner box, 500 per carton |
Material options
- Carbon Steel — the cost-effective default for volume programmes
- Silicone — the cost-effective default for volume programmes
- Natural Rubber — specified where the part sits close to a heat source
- Zinc Plated Steel — used when the finish has to hold a coating
- Aluminium Alloy — preferred when weight matters more than rigidity
Processes available
- surface grinding
- powder coating
- precision stamping
- heat treatment
- laser cutting
- CNC machining
Fitment notes
Keep the old part until the new one is on the bench. Comparing them side by side settles questions a photograph never will.
Where it is used
The specification above is the one most often ordered for rural transport. Related applications include construction sites, wet weather riding, weekend riding, mountain roads, daily commuting.
Quality and packing
- In-line inspection with AQL 2.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
What testing is included?
Standard lots ship with dimensional and hardness reports. CCC documentation is issued with the shipment when your market requires it.
What is the minimum order quantity?
The standard MOQ is 500 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
How is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
