30317DU Single Row Tapered Roller Bearing 85x180x44.5mm Open Type For Truck Wheel Hub Axle
30317DU is high-load metric single-row tapered roller bearing complying with ISO & NTN industrial specifiions, overall dimension 85×180×44.5 mm, widely applied in commercial vehicles and heavy machinery drive systems.
Manufactured from high-hardness quenched GCr15 bearing steel, equipped with stamped steel cage to evenly guide tapered rollers. D upgraded roller profile greatly extends service life under vibration and impact conditions; U universal tolerance ensures cross-brand interchangeability. Open unsealed design adapts perfectly to oil bath circulating lubriion inside closed axle housings and gearboxes, with outstanding heat dissipation performance. Single-row tapered structure bears simultaneous heavy radial load and one-way axial thrust, commonly used in back-to-back paired arrangement to realize bidirectional axial positioning for truck axles, drive shafts and transmission assemblies.
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| Parameter Item | Specifiion |
|---|---|
| Model | 30317DU |
| Bearing Type | Single Row Tapered Roller Bearing (NTN Standard) |
| Number of Row | Single row |
| Inner Diameter (d) | 85 mm |
| Outer Diameter (D) | 180 mm |
| Total Assembly Width (T) | 44.5 mm |
| Inner Ring Width (B) | 41 mm |
| Outer Ring Width (C) | 28 mm |
| Min Fillet Radius rs min | 4 mm / 3 mm |
| Basic Dynamic Load Rating (Cr) | 247 kN |
| Basic Static Load Rating (C0r) | 293 kN |
| Limiting Speed (Grease Lubriion) | 1900 rpm |
| Limiting Speed (Oil Lubriion) | 2500 rpm |
| Seal Type | Open (No Seals, Open Type) |
| Cage | Stamped Steel Press Cage |
| Structural Feature | Separable cone & cup; withstand combined radial + unidirectional axial load |
| Material | GCr15 Bearing Steel |
| Approx Net Weight | 4.85 kg |
| Operating Temperature | -30℃ ~ +120℃ |
| Precision Class | Standard P0 (P6/P5 optional) |
- Single row tapered roller layout: Large contact angle, superior combined radial + unidirectional axial load bearing capacity
- D enhanced internal design: Enlarged rollers, improved wear resistance & fatigue life under heavy cyclic loads
- U universal tolerance: Interchangeable with mainstream international brands, convenient global spare parts procurement
- Fully separable cone & cup: Easy assembly, preload fine-tuning, disassembly and overhaul
- Open no-seal construction: Designed for enclosed housing oil lubriion, efficient heat dissipation and lubricant circulation
- Stamped steel cage: Lightweight, cost-effective, stable running under medium-heavy vibration working conditions
- Heavy-duty trucks, buses, semi-trailers front/rear wheel hub axles
- Automobile manual transmissions, drive axle differential assemblies
- Forklifts, loaders, excavators construction machinery walking drive axles
- Tractors, large harvesters agricultural machinery transmission & axle parts
- Mining conveyors, heavy industrial reducers rotary supporting positions
- Engineering vehicle hydraulic transmission gearbox internal supporting bearings
*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
Q1: Exact overall dimensions?
A: Inner bore 85 mm, outer diameter 180 mm, total assembled width 44.5 mm.
Q2: What do suffix D and U stand for respectively?
A: D = optimized enhanced internal structure for higher load capacity; U = universal interchangeable tolerance for cross-brand replacement.
Q3: Seal Type?
A: Open Type, no rubber/metal dust seals on both sides.
Q4: Can single bearing bear bidirectional axial loads?
A: Single unit only withstands one-way axial force; two bearings mounted oppositely can bear bidirectional axial loads.
Q5: Two limiting rotation speeds?
A: Grease lubriion: 1900 rpm; Oil lubriion: 2500 rpm.
Q6: Can it be used on exposed outdoor rotating shafts?
A: Not suitable. Open structure must rely on closed equipment housing to block dust, mud and moisture.
*Contact us anytime for technical parameter consultation & selection guidance.
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