Tapered roller bearing 30210 is a separable single-row bearing designed to withstand combined radial and axial loads, widely used in industrial machinery, agricultural equipment, and the new energy field. The following is a detailed introduction to its core information:

1. Basic Dimensions

   Bore diameter: 50mm; outer diameter: 90mm; total width: 21.75mm; inner ring width: 20mm; outer ring width: 17mm; contact angle: 15.642°. The weight varies slightly among different manufacturers, typically ranging from 0.53kg to 0.64kg.

2. Load-Carrying Capacity
   • The basic dynamic load rating ranges from 73.6kN to 93.1kN, and the static load rating ranges from 87.4kN to 96kN.
   • The limiting speed is usually between 6000r/min and 8200r/min, with specific values depending on materials and manufacturing processes.
3. Structural Advantages

   It adopts a separable design, allowing the inner ring assembly and outer ring to be installed separately, facilitating maintenance and clearance adjustment. The line contact design between rollers and raceways enables it to bear high loads, with a low friction coefficient and long service life.

1. Industrial Machinery

   It is commonly used in equipment such as reducers, winches, and plastic granulators. Its high load-carrying capacity and impact resistance can meet heavy-load requirements. In the tool magazines of machining centers, this bearing can stably support high-speed rotating components.

2. Agricultural and Construction Machinery

   It is suitable for equipment like backhoe loaders and bottom presses, and particularly demonstrates good economy and reliability in agricultural machinery.

3. New Energy Field

   It is applied in bearings for new energy vehicles by manufacturers such as Jiangsu Luyue, meeting the transmission requirements of high speed and high precision.

1. Installation Methods
   • Interference Fit: Press-fitting or hot-fitting can be adopted. For press-fitting, use a spacer to apply force evenly, avoiding direct hammering; for hot-fitting, control the heating temperature at 80-100°C to prevent material tempering.
   • Preload Adjustment: For paired installation, adjust the preload through shims or nuts to ensure bearing rigidity. After installation, use a depth caliper to measure the clearance, ensuring full contact between rolling elements and ribs.
2. Lubrication Recommendations
   • Grease Lubrication: Fill 1/2-1/3 of the internal space of the bearing; reduce to 1/3 at high speeds. Lithium-based grease is recommended, with an operating temperature range of -30°C to 150°C. The replenishment cycle is adjusted according to working conditions, and the interval should be shortened in high-temperature environments.
   • Oil Lubrication: Suitable for high-speed or high-temperature scenarios; oil injection lubrication can be used, with an oil flow rate of approximately 16.5-25 ml/min.
3. Maintenance Inspection

   Regularly monitor temperature, vibration, and noise. If the temperature exceeds 70°C, shorten the lubrication cycle. Use special tools for disassembly to avoid damaging the raceway surface.

This model complies with DIN ISO 355 and DIN 720 standards, and some manufacturers have obtained CE certification, ensuring product quality and interchangeability.

Summary: Tapered roller bearing 30210, with its high load-carrying capacity, low friction, and separable design, has become a core component in the industrial transmission field. When selecting, users should comprehensively consider working conditions (such as load ratio, speed, and ambient temperature) and maintenance costs to achieve optimal performance and reliability.