About CHENJI
Your reliable partner for precision springs since 2014.
Who We Are
Jinan Chenji International Trade Co., Ltd. (CHENJI) has manufactured and exported precision springs from Jinan, Shandong, China since 2014. We run 35 spring-making machines and form wire from 10 mm to 80 mm, with in-house heat treatment up to 1500 °C.
Our product lines cover helical springs — compression, extension, torsion, wire forms and disc springs — manufactured under strict quality control and customized to your drawings and specifications.
Since 2014 we have served 1,000+ customers across 27 countries and completed over 1,000 orders. As an OEM / ODM private-label manufacturer, we build springs under our customers’ own brands.
Fast Facts
- Founded: 2014 — Jinan Chenji International Trade Co., Ltd.
- Export record: 1,000+ customers across 27 countries — including Saudi Arabia, Russia, Morocco, India, Chile and Bangladesh (as of September 2026)
- Orders completed: over 1,000 (springs and material testing machines)
- OEM / ODM private-label manufacturer — we build springs under our customers’ own brands
- Wire diameter range: 10–80 mm
- Spring-making equipment: 35 machines
- In-house heat treatment: up to 1500 °C
- Employees: 26–50
- Materials: music wire, 60Si2Mn, 50CrV4, stainless 302–304, Inconel 718
- ISO 9001 — certificate no. 626024QH073R1 (issued by Kaixin Certification; certificate updated September 2025)
- CRCC railway product certification — CRCC10219P11758R2M, valid until 2027-11-25 (assessed to TB/T 2211-2016)
- Bureau Veritas audit — report no. MIC-ASR2451820 (audited 2024-10-29)
- Inspection: in-house QC plus third-party (SGS / Bureau Veritas)
What We Do
Manufacturing
In-house production of springs with modern CNC equipment.
Trading & Export
Professional export team handling documentation, logistics and after-sales support.
Custom Solutions
OEM/ODM service — we develop products from drawings, samples or rough ideas.
Our Commitment
Quality first, delivery on time, and honest communication — that is how we build long-term partnerships with buyers worldwide.
Let's Work Together
ISO 9001 Quality Management Certified
Jinan Chenji International Trade Co., Ltd. operates a certified quality management system in accordance with ISO 9001 requirements.
- Certificate No.: 626024QH073R1
- Issued by: Kaixin Certification (Beijing) Co., Ltd.
- Scope: import and export trading business covering spring products and testing equipment
Bureau Veritas Audited Supplier
Jinan Chenji International Trade Co., Ltd. (CHENJI) has passed the on-site audit conducted by Bureau Veritas (BV), an internationally recognized inspection and certification body.
- Report No.: MIC-ASR2451820
- Audit date: 29 October 2024
- Audited product lines include railway springs, tensile testing machines, hardness testers and metallographic equipment
- Coverage: export trade capacity, service capacity, R&D and quality management
Contact us for a copy of the full audit report.