30314D Single Row Tapered Roller Bearing 70x150x38mm Open Type For Truck Wheel Hub Axle

30314D is a high-load single-row metric tapered roller bearing complying with ISO & JIS industrial standards, overall dimension 70×150×38 mm, widely adopted in automotive and heavy machinery transmission systems.

It is manufactured from high-purity hardened GCr15 bearing steel, equipped with pressed steel stamping cage to guide tapered rollers evenly. The D upgraded internal geometry greatly improves dynamic load capacity and fatigue life under alternating shock loads. Open unsealed design matches closed axle housings and gearbox oil bath lubrication environment perfectly. Single-row tapered structure bears simultaneous heavy radial load and unidirectional axial thrust, always used in back-to-back paired arrangement to realize bidirectional axial positioning for vehicle axles and transmission shafts.

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• Single row tapered roller layout: Large contact angle, excellent combined radial + one-way axial load bearing performance
• D optimized internal design: Enlarged roller profile, stronger shock resistance & longer service life
• Fully separable cone & cup: Easy installation, preload adjustment, disassembly and maintenance
• Open no-seal construction: Designed for enclosed housing oil lubrication, excellent heat dissipation
• Stamped steel cage: Light weight, low cost, stable operation under medium-heavy vibration conditions
• High hardness quenched steel raceway: Wear-resistant, suitable for variable load working scenarios

• Truck, bus, trailer front/rear wheel hub axles
• Automobile manual transmission, drive axle differential assemblies
• Forklift, loader, excavator construction machinery walking axles
• Tractor, harvester agricultural machinery transmission & axle parts
• Mining machinery, conveyor heavy-duty rotary supporting positions
• Industrial gear reducers, heavy equipment power transmission shafts

*Check matched bearing models to complete your mechanical assembly.

• 30 years professional bearing industry experience
• ISO certified strict quality inspection
• Flexible OEM & private label customization
• 3-5 days fast delivery for stocked bearings
• Full bearing series, universal interchangeable size
• Factory direct price & reliable after-sales service

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