CHENJIPrecision Springs Manufacturer
Jinan Chenji International supplies precision springs to customers worldwide. ISO-certified quality, OEM/ODM service, manufacturing experience since 2014.
Featured Products
Explore our range of precision springs – click any category for details and specifications.
Railway Suspension Springs
Hot-wound coil springs for locomotives, bogies and rail vehicles.
Primary Suspension Springs
Primary suspension coils that absorb track shocks with high fatigue life.
Secondary Suspension Springs
Secondary suspension springs engineered for ride comfort and stability.
Garage Door Springs
Torsion and extension springs for residential and commercial garage doors.
Why Choose CHENJI
A reliable manufacturing partner for global buyers.
ISO-Certified Quality
Strict QC from raw material to final inspection.
Since 2014
Deep expertise in spring & fastener manufacturing.
OEM / Custom Design
Custom specs, drawings and samples welcome.
Export to 27 Countries
Reliable shipping, documentation and support.
Factory & Quality Control
Quality is built in at every stage – from raw wire to finished spring.
In-House Production
Dedicated spring manufacturing lines – coiling, heat treatment, grinding and finishing all under one roof, with the flexibility to handle custom drawings.
Strict Quality Control
Every batch is dimension-checked and load-tested against drawing requirements before it leaves our workshop.
Certifications
CRCC certified for railway products, with ISO 9001 quality management and a Bureau Veritas audited factory.
Applications
Our products keep critical systems running across industries.
Railway Transit
Suspension springs for locomotives, freight wagons and rail vehicles - hot-coiled to customer drawings and railway standards. CRCC certified.
Metro & Urban Rail
Primary and secondary suspension springs for metro and urban rail vehicles, engineered for high-cycle fatigue life.
Mining Machinery
Heavy-duty springs for vibrating screens, crushers and mining equipment, designed for shock loads and abrasive conditions.
Garage Door & Shutter
Torsion and extension springs for garage doors and roller shutters, made to size in oil-tempered or galvanized wire.
Automotive
Custom suspension springs for automotive and commercial vehicles, with controlled load, fatigue performance and dimensional accuracy.
Construction
Springs for construction equipment - excavators, loaders, crushers and screens. Custom coils and replacement springs.
Looking for a Reliable Supplier?
Send us your drawings or requirements – we reply within 24 hours with a competitive quotation.