About OTT Bearing
The Specialist Manufacturer of Automotive Bearings — Since 2011
Zhejiang Tongtao Bearing Co., Ltd.
Founded in 2011, OTT (Zhejiang Tongtao Bearing Co., Ltd.) is a professional bearing manufacturer integrating R&D, design, production, and sales. We specialize in high-precision automotive bearing solutions for global OEM clients across 50+ countries.
With 150 skilled employees including senior engineers, our team operates 24 fully automated production lines achieving an annual capacity of 20 million bearing sets. Product precision consistently reaches P6/P5 grades, meeting the demands of high-end automotive applications.
Our facility spans 15,300 m² of land with 20,000+ m² of modern workshop space in Jiashan, Zhejiang Province. Equipped with international-standard CNC grinding, automated assembly, and comprehensive testing equipment, we deliver quality that meets IATF 16949 automotive industry standards.
Our Vision
企业愿景
To craft every bearing with excellence for customers worldwide and become a respected bearing manufacturer.
为世界做好每一颗轴承，成为受人尊敬的轴承企业。
Our Mission
企业使命
To consistently exceed our customers' expectations through technological innovation and advance efficiency and reliability across the bearing industry.
以创新科技持续超越轴承用户的需求，推动轴承行业高效可靠发展。
Our Values
企业价值观
Our products reflect our integrity.
产品代表我们的人品。
World-Class Manufacturing Facility
Located in Jiashan, Zhejiang, our 20,000+ m² facility houses 24 fully automated production lines with international-standard inspection equipment — from CNC grinding to automated assembly.
Production Workshop
24 fully automated production lines covering CNC grinding, assembly, and heat treatment — precision from raw material to finished bearing.
Quality Testing Laboratory
Inspection capabilities include high-precision contour measurement of bearing raceways, precision length measurement on a universal length measuring machine, vibration (BVT) analysis, salt-spray and mud-environment testing, and bearing life testing — ensuring every bearing meets IATF 16949 standards.
Office & Showroom
Professional reception center for global customers — product showroom, meeting facilities, and sample display area.
Packaging & Shipping
OTT branded packaging with multi-layer protection — individual anti-rust bags, branded boxes, carton cases, and wooden pallets for safe international shipping.
Core Technology
Carbonitriding (C-A) Heat Treatment
OTT uses high-purity bearing steel with reduced non-metallic oxide content, combined with our Carbonitriding (C-A) heat treatment process. Compared to conventional steel bearings, our C-A treated bearings deliver superior strength and quality uniformity.
Quality Certifications
IATF 16949:2016
Automotive quality management system — the gold standard for automotive suppliers worldwide.
ISO 14001:2015
Environmental management system — green manufacturing commitment.
ISO 45001:2018
Occupational health and safety management system.
RoHS Compliant
Restriction of Hazardous Substances — safe materials in every product.
REACH Compliant
EU chemical safety regulation — full compliance for European market.
The OTT® trademark is registered in Europe, Russia, South Korea, and South America.
Partner with OTT Bearing
Whether you need standard bearings or custom OEM solutions, we're ready to help. Reply within 12 hours.