Precision Power Transmission
Components & Solutions
Custom gears, sprockets, gearboxes, and CNC machined parts — engineered for reliability. 20+ years of manufacturing excellence serving customers in 50+ countries.
Why Choose GRANGIN
A nationally recognized high-tech enterprise with proven manufacturing capabilities and ISO-certified quality systems.
Engineering Excellence
Chief Engineer with 30+ years of automation expertise. Engineering team averaging 15+ years of experience. Comprehensive 3D design blueprints for every project.
Quality Assurance
ISO 9001, 45001, 14001 certified. 25+ dedicated QC professionals. Three-stage manual inspection process. Coordinate measuring machines and gear profile testers.
Rapid Response
12-hour guaranteed response for all inquiries. Priority fast-track for urgent orders. Optimized production scheduling. Export-grade packaging for safe delivery.
Custom Manufacturing
Full OEM/ODM support with 35+ materials. CNC machining, laser cutting, sheet metal fabrication. One-to-one design solutions tailored to your exact specifications.
Our History
Two decades of precision engineering — from a small workshop to a nationally recognized high-tech enterprise.
Company Founded
Established as a precision gear manufacturer in Zhejiang Province with a single workshop and 15 employees.
ISO 9001 Certified
Achieved ISO 9001 quality management certification. Expanded product line to include gearboxes and speed variators.
Factory Modernization
Relocated to a new 10,000㎡ modern facility in Sanjie High-tech Park. Introduced CNC machining and automated production lines.
ISO 14001 & 45001
Certified for environmental management (ISO 14001) and occupational health & safety (ISO 45001). Began exporting to European markets.
National High-Tech Enterprise
Recognized as a National High-Tech Enterprise. Launched the GRANGIN brand with a focus on intelligent manufacturing.
Global Reach
Products exported to 50+ countries. 25,000+ pieces monthly output. Ranked among top transmission manufacturers in East China.
Product Categories
Comprehensive range of power transmission components and custom manufacturing services.
See Our Factory in Action
Take a virtual tour of our 10,000㎡ advanced manufacturing facility. See how precision components are made from raw material to finished product.
Factory Tour Video
Coming Soon
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Industries We Serve
Reliable power transmission solutions for diverse industrial applications worldwide.
Trusted by Customers Worldwide
Multi-awarded as "Integrity Enterprise" and "Grade-A Taxpayer" by authorities.
"GRANGIN has been our trusted partner for custom transmission components. Consistent quality and highly professional engineering support."
Peter Schneider
Germany
"We source sprockets and chains from GRANGIN. Fast delivery, competitive pricing, and excellent customer service."
William Jones
United Kingdom
"Outstanding CNC machining capabilities. Complex custom parts delivered with precision and on schedule."
Thomas Schmidt
Germany
"Our go-to supplier for power transmission. One-to-one design solutions and rigorous quality control."
Juan García
Spain
Latest Insights
Technical guides and industry updates from our engineering team.
News articles coming soon. Check back for technical guides and industry updates.
Start Your Project Today
Send us your drawings or specifications. Our engineering team responds within 12 hours with a tailored solution and 3D design blueprint.