Single-row angular contact ball bearings
7040 BGM / 7240 BCBM / 7340 BCBM 他 / SKF (Official website) / Listed on page 47 of the document
Single-row angular contact ball bearings with bore diameters of 200 to 320 mm. Dynamic load rating, limiting speed and other values are listed by dimension.
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Specifications
| Inner diameter d | 200 to 320 mm |
|---|---|
| Outer diameter D | 310 to 580 mm |
| Width B | 51 to 92 mm |
| Basic dynamic load rating Cr | 290 to 1020 kN |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Single-row angular contact ball bearings).
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1. Bore and housing bore dimensions
This product: Inner diameter d 200 to 320 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 290 to 1020 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
Table of main dimensions, basic dynamic load rating, fatigue load limit, reference speed, mass and designation for single-row angular contact ball bearings with bore diameters of 200 to 320 mm. Some bearings are SKF Explorer bearings.
FAQ
- Q. What are the ranges of bore diameter, outside diameter and width for 7040 BGM / 7240 BCBM / 7340 BCBM?
- A. Bore diameter d is 200 to 320 mm, outside diameter D is 310 to 580 mm, and width B is 51 to 92 mm.
- Q. What is the basic dynamic load rating Cr of single-row angular contact ball bearings?
- A. The basic dynamic load rating Cr is 290 to 1020 kN.
- Q. Are some single-row angular contact ball bearings SKF Explorer bearings?
- A. Yes, some of them are SKF Explorer bearings.
Written by AI based on the content of the source documents.
Source documents
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Catalog
アンギュラ玉軸受 (SKF 製品カタログ抜粋)
62 pages Open page 47
Found on: https://azuma-eg.com/catalogue/
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