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 lubriion 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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| Parameter Item | Specifiion |
|---|---|
| Model | 30314D |
| Bearing Type | Single Row Tapered Roller Bearing |
| Number of Row | Single row (1 row tapered rollers) |
| Inner Diameter (d) | 70 mm |
| Outer Diameter (D) | 150 mm |
| Overall Width (T) | 38 mm |
| Inner Ring Width (B) | 35 mm |
| Outer Ring Width (C) | 25 mm |
| Min Fillet Radius rs min | 3 mm / 2.5 mm |
| Basic Dynamic Load Rating (Cr) | 214 kN |
| Basic Static Load Rating (C0r) | 229 kN |
| Limiting Speed (Grease Lubriion) | 2300 rpm |
| Limiting Speed (Oil Lubriion) | 3000 rpm |
| Seal Type | Open (No Seals) |
| Cage | Stamped Steel Sheet Cage (Standard) |
| Structure Feature | Separable cone & cup assembly; withstand combined radial + one-way axial load |
| Material | GCr15 Bearing Steel |
| Approx Net Weight | 2.92 kg |
| Operating Temperature | -30℃ ~ +120℃ |
| Precision Class | Standard P0 (P6/P5 optional) |
- 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 lubriion, 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
A: Inner bore 70 mm, outer diameter 150 mm, total width 38 mm.
A: Optimized enhanced internal structure, increased load capacity standard for NTN/KOYO series tapered roller bearings.
A: Open Type, no rubber/metal seals on both sides, open structure.
A: Single unit only withstands one-way axial force; two bearings mounted oppositely can bear bidirectional axial loads.
A: Grease lubriion: 2300 rpm; Oil lubriion: 3000 rpm.
A: Not recommended; open design relies on closed housing to block dust and moisture.
*Contact us anytime for technical parameter consultation & selection guidance.
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