Tapered Roller Bearing
円すいころ軸受 (32000・30000系等) / JTEKT Corporation (Official website) / Listed on page 10 of the document
Heavy-load roller bearing using tapered trapezoidal rollers, capable of supporting both radial and axial loads. Outer ring and inner ring subassembly can be separated for easy mounting.
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How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Tapered Roller Bearing).
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1. Main dimensions matching shaft diameter and housing
The bore diameter d is determined by the shaft diameter, while the outside diameter D and width B are determined by the housing bore diameter and mounting space. Main dimensions are standardized under JIS/ISO series, which makes replacement with interchangeable products easier. For tapered roller bearings, also check the assembled width T and outer ring width C; for thrust bearings, also check the height H.
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2. Check dynamic load rating against required life
The basic dynamic load rating Cr is the reference value for calculating rolling fatigue life during rotation. Calculate the rated life from the actual applied load and rotational speed, and confirm that the required life is met. Roller bearings have a larger Cr than ball bearings of the same dimensions and are suited to heavy loads.
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3. Check static load rating for stationary or shock loads
In applications involving low-speed rotation, oscillation, or shock loads while stopped, permanent deformation (indentations) may remain on the raceway surfaces. Therefore, check the safety factor using the ratio of the basic static load rating C0r to the maximum load.
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4. Combination of rotational speed and lubrication method
The limiting speed differs between grease lubrication and oil lubrication. Confirm that the operating speed has sufficient margin using the value for the lubrication method adopted. At higher speeds, the cage material, guide method, and accuracy grade also affect rotational performance.
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5. Handling load direction and shaft misalignment
If axial loads (loads in the shaft direction) are also applied, check the contact angle of angular contact ball bearings or tapered roller bearings. The larger the contact angle, the greater the capacity to accept axial loads. If the shaft deflects or there are mounting errors, check the permissible misalignment angle of self-aligning types.
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6. Materials for high-temperature, vacuum, and corrosive environments
In high-temperature, vacuum, or chemical-exposed environments, common combinations of steel and grease may not be usable. Therefore, confirm the operating temperature range and atmospheric pressure, then select the rolling element material and cage material accordingly. Options include ceramics, stainless steel, solid lubricants, and fluorine grease.
This guide was written by AI based on the listed products' documents and specification items.
Description
Available in normal, medium, and steep angle designs depending on contact angle; the larger the contact angle, the greater the axial load capacity. Many inch-dimension series products are also used, applied in automobile front and rear wheels, transmissions, and similar equipment.
Features
- Suitable for heavy loads and shock loads
- Outer ring and inner ring subassembly are separable
- Inch series products available
Applications
- Automobile front and rear wheels
- Transmissions
- Differential pinions
- Machine tool spindles
- Construction machinery
- Railway vehicle reduction gear units
FAQ
- Q. Can tapered roller bearings (32000, 30000 series, etc.) support both radial and axial loads?
- A. Yes. These bearings use tapered trapezoidal rollers and can support both radial and axial loads.
- Q. How does the contact angle of tapered roller bearings (32000, 30000 series, etc.) affect axial load capacity?
- A. Depending on the contact angle, there are normal, medium, and steep angle designs. The larger the contact angle, the greater the axial load capacity.
- Q. Can tapered roller bearings (32000, 30000 series, etc.) be used in applications with heavy loads or shock loads?
- A. Yes. They are suitable for heavy loads and shock loads. They are used in automobile front and rear wheels, transmissions, construction machinery, railway vehicle reduction gear units, and similar applications.
- Q. Can the outer ring and inner ring of tapered roller bearings (32000, 30000 series, etc.) be handled separately during mounting?
- A. Yes. The outer ring and inner ring subassembly are separable, which makes mounting easy.
- Q. Are inch-dimension products available for tapered roller bearings (32000, 30000 series, etc.)?
- A. Yes. Many inch-dimension series products are used, and inch series products are available.
Written by AI based on the content of the source documents.
Source documents
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Catalog
転がり軸受 総合カタログ
Open page 10
Found on: https://koyo.jtekt.co.jp/products/exsev/
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