We machine production parts for Rail and Transit Systems customers, from single prototypes through to repeat batches of tens of thousands. Typical work covers bogie components, door mechanisms and interior fittings, usually in 4140 or 316L.
What makes Rail and Transit Systems different from general machining is not the geometry — it is the documentation and the failure modes. The parts that come back are the ones where fire, smoke and toxicity requirements restrict materials was not designed out at the start.
Parts we machine for Rail and Transit Systems
- Bogie components
- Door mechanisms
- Interior fittings
- Brake parts
- Couplers
Materials we run for Rail and Transit Systems
- 4140
- 316L
- Aluminium 6082
- Ductile iron
Standards and documentation
- EN 15085 for welding, EN 45545 for fire, customer-specific standards
Tell us which standard applies and which documents you need with the shipment. Dimensional reports, material certificates, certificates of conformity and first article inspection reports are all available, and it is much cheaper to agree them before the batch runs than to reconstruct them afterwards.
Where Rail and Transit Systems projects usually go wrong
- Fire, smoke and toxicity requirements restrict materials
- Homologation paperwork is heavy
Tolerance and finish we hold
| Requirement | Typical capability |
|---|---|
| General tolerance | +/-0.05 mm, H7 fits, full traceability with 3.1 material certificates |
| Surface finish | Ra 0.4 to 3.2 um |
| Material certification | EN 10204 3.1 on request |
| Inspection | Dimensional report, CMM report, FAIR |
| Packaging | VCI and desiccant for steel, individual wrap for cosmetic faces |
Frequently asked questions
Do you have experience with Rail and Transit Systems parts?
Yes. Typical parts we run are bogie components and door mechanisms. We can share the process route and inspection approach for a comparable part before you commit.
Which materials do you recommend for Rail and Transit Systems?
4140, 316L, Aluminium 6082, Ductile iron. The right choice depends on which of corrosion, weight, strength and cost is the binding constraint, and we will say so plainly rather than quoting the most expensive option.
What documentation do you provide?
A dimensional report and a certificate of conformity as standard. Material certificates, CMM reports, FAIR and PPAP submissions are available when your quality system requires them.
What tolerances do you hold for Rail and Transit Systems parts?
+/-0.05 mm, H7 fits, full traceability with 3.1 material certificates is typical for the industry. Tighter tolerance on individual features is possible and is quoted against the specific feature rather than the whole part.
Related pages
- Industries — the full index for this section.
- CNC Machining for Construction Equipment
- CNC Machining for Wind Energy Components
- CNC Machining for Packaging Machinery
- CNC Machining for Solar Mounting and Tracker Parts
- Instant CNC quote
- Tolerance quick reference
- Frequently asked questions
Get a price for your part
Send a STEP file and a drawing with tolerances, material and quantity. We quote within one working day and machine in our own facility in Shenzhen — milling, turning, EDM, grinding and finishing under one roof, no trading middleman.
Start an instant quote or send your drawings directly. English-speaking engineering support, DFM feedback before you commit to a batch.