Since 2011 · Jiashan, China · IATF 16949
Zhejiang Tongtao Bearing Co., Ltd.
Automotive Bearing Manufacturerfor OEM & custom programs.
Wheel hub, tapered roller, tensioner, alternator and A/C compressor bearings — built to your drawing or OE number for component makers and aftermarket brands in 50+ countries.
Trusted supply partner
Chosen by component makers and aftermarket groups worldwide.
Built for B2B supply
A bearing factory for factories.
OTT is not a trading company. We design, heat-treat, grind, assemble and test every bearing in our own 20,000 m² plant — so the engineer you talk to is the one who controls the process.
Component & Assembly Manufacturers
Alternator, tensioner, A/C compressor and hub-unit makers who buy bearings as a production input. Stable batch-to-batch quality and low-noise vibration grades for your assembly line.
OEM supply programPrivate-Label & Aftermarket Brands
Your brand laser-marked on the ring, your color boxes, your catalog numbers. OE cross-reference support and MOQ from 1,000 pcs per model.
Start a private-label lineDistributors & Importers
Wheel, tensioner, alternator and A/C clutch bearings interchangeable with SKF, FAG, NTN, NSK and KOYO numbers. Mixed-model orders, FOB Ningbo / Shanghai.
Browse the catalogProduct lines
Eight automotive bearing families. One quality system.
DAC series · ID 20–80 mm · Ball & tapered type
Wheel Hub Bearings
Pre-sealed, pre-lubricated double-row bearings for passenger cars, SUVs and light trucks. Cross-referenced to SKF, FAG, KOYO, NTN, NSK, SNR and BCA.
Gen 2 / Gen 3 · ABS-ready
Wheel Hub Units
Timing & serpentine drives
Tensioner & Idler Pulleys
Metric & inch · Timken interchange
Tapered Roller Bearings
Bearings + Seals + Hardware
Wheel Bearing Kits
High-speed · cold start to −60 °C
Alternator & Starter Bearings
Bore 25–50 mm · 2RS · Z2V2
A/C Compressor Clutch Bearings
High speed Ball bearing & Rod Ends
Go-Kart Bearings
Need a bearing that is not listed? OTT also manufactures to customer drawings —send us your specification.
Engineering response
Technical quotation within 12 hours of receiving your drawing.
OEM & custom bearings
Built to your drawing,
not pulled from a shelf.
Every parameter that affects life and noise in your application can be specified — and is held constant from first sample to the hundredth container.
From RFQ to container
- 01Quote in 12 h
Drawing or OE number
Send a drawing, sample or competitor part number. Our engineers confirm dimensions, load and sealing requirements.
- 023–7 days
Engineering & samples
Material, heat treatment and clearance are specified for your application, then samples are built on production tooling.
- 03Your test cycle
Validation & approval
Dimensional and vibration inspection reports supplied with samples for your incoming-quality approval.
- 0430–45 days
Mass production
Scheduled on 24 automated lines with 100% final vibration testing. Shipped FOB Ningbo or Shanghai.
In-house quality & testing lab
Core technology
Carbonitriding for 5–10× longer bearing life.
OTT's C-A carbonitriding process enriches the raceway surface with carbon and nitrogen, raising hardness and retained austenite to resist contamination and spalling — the leading causes of premature wheel and pulley bearing failure.
- 5–10×
- Longer service life with C-A carbonitriding
- 1,004 h
- Endurance test passed for a Russian OEM
- −60 °C
- Verified cold-start performance
- P5
- Highest precision grade produced
Manufacturing
20,000 m² of automated, inspected production.
- 01100% incoming material inspection
- 02CNC precision grinding
- 03Automated assembly & greasing
- 04100% vibration & noise testing
- 05Final inspection & export packing
Quality system
Certified to the automotive industry's own standard.
Global reach
Applications across 40+ vehicle brands.
OE cross-references cover Peugeot, Citroen, Renault, Fiat, Volkswagen, Mercedes-Benz, BMW, Audi, Toyota, Mitsubishi, Honda, Nissan and more. OTT trademarks are registered in Europe, Russia, South Korea and South America.
Meet us at
- Equip Exposition 2026 (Louisville, USA · Oct 21–23 · Booth 23083)
- Automechanika Johannesburg 2026 (South Africa · Oct 27–29 · Booth 3D39)
- AAPEX 2026 (Las Vegas, USA · Booth 21641)
Request for quotation
Send us a part number. Get an engineer's answer.
Share an OE / competitor number, a drawing or target dimensions and annual volume. Samples available for qualified projects.
- [email protected]
- WhatsApp / Mobile
- +86 139 6823 0098
- Factory
- No. 333 Xiahu Road, Taozhuang Town, Jiashan County, Zhejiang, China