Metric Tapered Roller Bearings (for Machine Tools)
32000JR系列・32900JR系列・30200JR系列・32200JR系列 / JTEKT Corporation (Official website) / Listed on page 130 of the document
Single-row tapered roller bearings and flanged-outer-ring tapered roller bearings for machine tools. Bore diameters range from 35 to 190 mm, and they simultaneously accept radial and axial loads.
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Specifications
| Inner diameter d | 35〜190 mm |
|---|---|
| Outer diameter D | 55〜200 mm |
| Basic dynamic load rating Cr | 32.8〜361 kN |
| Limiting speed (oil lubrication) | 2 000〜6 600 min-1 |
| Grade | JIS Class 5 / Class 4 equivalent |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Metric Tapered Roller Bearings (for Machine Tools)).
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1. Bore and housing bore dimensions
This product: Inner diameter d 35〜190 mmSelect 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
This product: Basic dynamic load rating Cr 32.8〜361 kNThe 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
Designed to ISO subunit dimensions, cones and cups with the same nominal number are internationally interchangeable. Flanged-outer-ring types have a B suffix at the end of the model number. Accuracy grades are equivalent to JIS Class 5 and Class 4. Preload adjustment is simple and rigidity is high.
Features
- Simultaneously accepts radial and axial loads
- Internationally interchangeable with ISO subunit dimensions
- Flanged outer ring types available
- Equivalent to JIS Class 5 and Class 4
Applications
- Bearings for machine tools
FAQ
- Q. What type is the product with a B suffix at the end of the model number in Metric Tapered Roller Bearings (for Machine Tools)?
- A. It is a flanged outer ring type. The model number ends with B.
- Q. Which loads can Metric Tapered Roller Bearings (for Machine Tools) accept simultaneously?
- A. They can simultaneously accept radial and axial loads.
- Q. What are the ranges of bore diameter, outer diameter, accuracy grade, and limiting speed for Metric Tapered Roller Bearings (for Machine Tools)?
- A. Bore diameter d ranges from 35 to 190 mm, and outer diameter D ranges from 55 to 200 mm. Accuracy grades are equivalent to JIS Class 5 and Class 4. The limiting speed (oil lubrication) is 2 000 to 6 600 min-1.
- Q. Are Metric Tapered Roller Bearings (for Machine Tools) internationally interchangeable?
- A. Yes. They are designed to ISO subunit dimensions, and cones and cups with the same nominal number are internationally interchangeable.
Written by AI based on the content of the source documents.
Source documents
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