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 specifications, 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 lubrication 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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• 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 lubrication, 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

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