4T-30210 Single Row Tapered Roller Bearing 50x90x21.75mm Open For Agricultural & Construction Machinery Axles
4T-30210 is standard metric single row tapered roller bearing following ISO and NTN specifiions, dimension 50×90×21.75mm. Made of hardened GCr15 bearing steel, equipped with stamped steel cage to guide tapered rollers evenly.
The bearing is fully separable: inner ring assembly and outer ring can be taken apart separately, convenient for installation, preload adjustment and maintenance. Medium contact angle design balances radial load and one-way axial load perfectly. Open unsealed structure is designed for oil bath lubriion inside closed housings such as vehicle axles and gearboxes, with excellent heat dissipation and lubricant circulation effect. Widely used in light trucks, passenger cars, agricultural machinery and general industrial transmission systems.
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| Parameter Item | Specifiion |
|---|---|
| Model | 4T-30210 |
| Bearing Type | Single Row Tapered Roller Bearing |
| Number of Row | Single Row |
| Inner Diameter (d) | 50 mm |
| Outer Diameter (D) | 90 mm |
| Total Width (T) | 21.75 mm |
| Inner Ring Width (B) | 20 mm |
| Outer Ring Width (C) | 16 mm |
| Min Fillet Radius | 1.5 mm |
| Basic Dynamic Load Cr | 73.2 kN |
| Basic Static Load C0r | 88.5 kN |
| Limiting Speed (Grease) | 3200 rpm |
| Limiting Speed (Oil) | 4200 rpm |
| Seal Type | Open (No Seals) |
| Cage | Stamped Steel Cage |
| Structure | Separable cone & cup; bears radial + unidirectional axial load |
| Material | GCr15 Bearing Steel |
| Net Weight | 0.58 kg |
| Working Temp | -30℃ ~ +120℃ |
| Precision Grade | Standard P0 |
- Single row tapered roller structure: Bear combined radial load + one-way axial thrust
- Medium contact angle: Balanced load capacity, universal for most vehicle and machinery scenarios
- Fully separable inner & outer rings: Easy assembly, clearance adjustment and replacement
- Open design: Suitable for gearbox/axle housing internal oil lubriion, good heat dissipation
- Stamped steel cage: Lightweight, low cost, stable operation under regular vibration
- Standard universal size: Interchangeable with NSK, SKF, KOYO same model bearings
- Passenger cars, light trucks, vans front & rear wheel hubs
- Motorcycle, small trailer axle assemblies
- Automobile manual gearbox, small differential parts
- Tractors, small harvesters agricultural machinery walking axles
- Small construction equipment, forklift auxiliary transmission shafts
- General industrial reducers, small rotary supporting mechanisms
*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: Full dimensions?
A: ID 50mm, OD 90mm, total assembly width 21.75mm
Q2: What does 4T mean?
A: NTN series code, means complete assembled tapered roller bearing unit
Q3: Seal type?
A: Open, without any rubber or metal seals
Q4: Can it withstand two-way axial load alone?
A: Single bearing only supports one-way axial force; two bearings installed oppositely realize bidirectional axial positioning
Q5: Limiting rotation speeds?
Grease lubriion:3200rpm; Oil lubriion:4200rpm
*Contact us anytime for technical parameter consultation & selection guidance.
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