Thrust Cylindrical Roller Bearing
スラスト円筒ころ軸受 (811・812系等) / JTEKT Corporation (Official website) / Listed on page 12 of the document
A thrust bearing composed of washer-shaped raceways, cylindrical rollers and a cage, supporting axial load in one direction.
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How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Thrust Cylindrical 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
The cylindrical rollers are crowned to equalize the pressure distribution between the rollers and raceway surfaces. Used in oil drilling rigs, steel plants and other industrial equipment.
Features
- High axial load capacity
- Crowned rollers provide uniform pressure distribution
Applications
- Oil drilling rigs
- Steel plant equipment
FAQ
- Q. What type of load does a thrust cylindrical roller bearing (811 and 812 series, etc.) support?
- A. It is a thrust bearing composed of washer-shaped raceways, cylindrical rollers and a cage, supporting axial load in one direction.
- Q. What are the features of thrust cylindrical roller bearings (811 and 812 series, etc.)?
- A. They feature high axial load capacity. The cylindrical rollers are also crowned to equalize the pressure distribution between the rollers and raceway surfaces.
- Q. What types of equipment are thrust cylindrical roller bearings (811 and 812 series, etc.) mainly used in?
- A. They are used in oil drilling rigs, steel plants and other industrial equipment.
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 12
Found on: https://koyo.jtekt.co.jp/products/exsev/
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