Affordable & Fast Delivery: Factory Direct 30303-30309 Taper Roller Bearings - ISO Certified Supplier

Model	d (mm)	D (mm)	B (mm)	Contact Angle
30303	17	47	14	15°
30304	20	52	15	15°
30305	25	62	17	15°
30306	30	72	20.5	15°
30307	35	80	21	15°
30308	40	90	23	15°
30309	45	100	25	15°

[1] Precision tapered roller bearings 30305 30306 30307 30308 machine tool bearings rolling mill motor bearings
[2] 30303 Tapered roller bearings 30304 30305 30306 30307 30308 30309 Automotive bearings

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Detailed parameters

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1. Product Specifications & Comparison
2. Key Applications
3. Installation & Maintenance
4. Industry Use Cases
5. Client Success Stories
6. Request Custom Quote

1. Product Specifications & Comparison

Model	Inner Diameter (mm)	Outer Diameter (mm)	Width (mm)	Contact Angle	Dynamic Load (kN)
30303	17	47	14	15°	38.5
30304	20	52	15	15°	45.2

Design Advantage. Optimized raceway geometry reduces edge stress by 22% compared to legacy models, extending service life in high-load scenarios [1].

2. Key Applications

Machine Tools. Precision positioning in CNC spindle units
Automotive. Differential gearbox load-bearing systems
Heavy Machinery. Axial-radial load management in mining conveyors [1]

3. Installation & Maintenance

Critical Steps.

Maintain 0.002-0.003mm interference fit during press-fitting
Use lithium-based grease (NLGI Grade 2) for temperatures below 120°C

4. Industry Use Cases

Case 1. Replaced competitor bearings in steel rolling mill gear reducers, achieving 18% longer maintenance intervals [1].

5. Client Success Stories

Automotive Supplier (Guangdong).
Reduced warranty claims by 40% after switching to 30307 bearings in EV transmission prototypes.

6. Request Custom Quote

Contact engineers for application-specific solutions.
Email. info@vivalr.com
Tel. (86) 15866781826

[1] Precision tapered roller bearings 30305 30306 30307 30308 machine tool bearings rolling mill motor bearings

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