JHS210 Cylindrical Roller Bearing for Backup Rolls of Multi-High Rolling Mills
JHS210 / JTEKT Corporation (Official website) / Listed on page 6 of the document
Cylindrical roller bearing for backup rolls of multi-high rolling mills. The inner ring uses case-hardened steel to improve rolling life under low-viscosity lubrication.
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Specifications
| Service Life (Compared to Conventional) | Approx. 2x (standard), approx. 4x (premium) |
|---|
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (JHS210 Cylindrical Roller Bearing for Backup Rolls of Multi-High Rolling Mills).
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1. Bore and housing bore dimensions
Select the bore diameter d to match the shaft seat, the outside diameter D to match the housing bore, and the width B to suit the installation space. Main dimensions are standardized in ISO and JIS dimension series, so interchangeable products can be found by boundary dimension designation. For tapered roller bearings, also check the assembled width T; for thrust bearings, also check the height H.
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2. Dynamic load rating based on life calculation
The basic dynamic load rating Cr is the reference value for calculating rated life. Verify that the required life is met using the equivalent load during operation and the rotational speed. For ball bearings, life is proportional to the cube of the load ratio, so providing load margin greatly extends life.
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3. Margin for static and shock loads
The basic static load rating C0r is the allowable standard for permanent deformation generated at the rolling elements and raceways under stationary or low-speed conditions. For applications with oscillating motion or shock loads, confirm that a static safety factor against the maximum load is secured using C0r.
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4. Operating speed and lubrication method
The limiting speed differs by lubrication method, and separate values are given for grease lubrication and oil lubrication. Confirm that the normal operating speed does not exceed the limiting value, and in high-speed ranges also consider cage material and precision grade. The reference speed can also be consulted as a thermal guideline.
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5. Precision grade and internal clearance
Precision grades (P0, P6, P5, etc.) indicate rotational accuracy and dimensional accuracy; for high-precision applications such as machine tool spindles, select higher grades. Internal clearance (C2, CN, C3, etc.) is selected to allow for changes caused by interference fit and temperature differences during operation.
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6. Materials and lubrication suited to the environment
For corrosive, high-temperature, vacuum, or clean environments, select specifications such as rings and rolling elements made of stainless steel or ceramics, or solid lubricants and fluorine grease for vacuum use. Check the operating temperature range, low dust generation, and whether food-grade grease registration applies against the application conditions.
This guide was written by AI based on the listed products' documents and specification items.
Description
Uses a newly developed case-hardened steel for the inner ring to improve spalling life under low-viscosity lubrication. The Premium specification further enhances outer ring durability and rotational accuracy. The oil-mist lubrication type features an improved sealing structure to extend bearing life.
Features
- Improved rolling contact fatigue life of the inner ring
- Improved outer ring durability and rotational accuracy
- Oil-mist lubrication structure with high sealing performance
- Improved ease of regrinding the outer ring
Applications
- Multi-high rolling mills
FAQ
- Q. What applications is the JHS210 Cylindrical Roller Bearing for Backup Rolls of Multi-High Rolling Mills suited for?
- A. It is a cylindrical roller bearing for backup rolls of multi-high rolling mills. It is a product with improved rolling life under low-viscosity lubrication.
- Q. What material is used for the inner ring of the JHS210?
- A. The inner ring uses newly developed case-hardened steel. It improves spalling life under low-viscosity lubrication.
- Q. How much longer is the life of the JHS210 compared with conventional products?
- A. Life relative to conventional products is approximately 2 times for Standard and approximately 4 times for Premium.
- Q. What is enhanced in the Premium specification of the JHS210 compared with the Standard?
- A. The Premium specification further enhances outer ring durability and rotational accuracy.
- Q. Can the JHS210 be used with oil-mist lubrication, and how is sealing handled?
- A. An oil-mist lubrication type is available. The sealing structure is improved to extend bearing life, and it features an oil-mist lubrication structure with high sealing performance.
Written by AI based on the content of the source documents.
Source documents
- Catalog 製鉄・圧延設備用 高性能商品シリーズ Open page 6
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