Crankshaft for BMW 3 Series: Silicone
This crankshaft for the BMW 3 Series is specified around silicone, 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 warranty claims traced back to a single lot, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Crankshaft |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Silicone |
| Typical use | Urban Courier Work |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | SAE J431 |
| Packing | 20 pieces per inner box, 1000 per carton |
Material options
- Chromed Steel — the cost-effective default for volume programmes
- Silicone — specified where the part sits close to a heat source
- Kevlar Composite — used when the finish has to hold a coating
- Powder Coated Steel — preferred when weight matters more than rigidity
- ABS Plastic — selected when the part is exposed to weather and road salt
Processes available
- heat treatment
- rubber vulcanisation
- assembly line testing
- anodising
- electroplating
- sintering
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 urban courier work. Related applications include construction sites, daily commuting, security patrols, coastal delivery, mountain roads.
Quality and packing
- In-line inspection with AQL 4.0 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
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.
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 3 days once you have seen the first piece.
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.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 3000 pieces per line.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.
