Precision Ball Screw Support Bearing SAC1747B
Model SAC1747B / SAC0000B系列 / JTEKT Corporation (Official website) / Listed on page 143 of the document
Thrust angular contact ball bearing for precision ball screw support, with 17 mm bore and 47 mm outside diameter. Contact angle 60° for high rigidity.
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Specifications
| Inner diameter d | 17 mm |
|---|---|
| Outer diameter D | 47 mm |
| Width B | 15 mm |
| Basic dynamic load rating Ca (single unit) | 3.7 kN |
| Permissible axial load (double-row combination) | 25.5 kN |
| Limiting speed (grease lubrication) | 6300 min-1 |
| Limiting speed (oil lubrication) | 8000 min-1 |
| Mass | 0.130 kg |
SAC0000B系列 model comparison
Compare 2 models in the same series by specification.
| Model | Inner diameter d | Outer diameter D | Width B | Limiting speed (grease lubrication) | Limiting speed (oil lubrication) | Mass | Basic dynamic load rating Ca (single unit) | Permissible axial load (double-row combination) |
|---|---|---|---|---|---|---|---|---|
| SAC1747B This product | 17 mm | 47 mm | 15 mm | 6300 min-1 | 8000 min-1 | 0.130 kg | 3.7 kN | 25.5 kN |
| SAC2562B | 25 mm | 62 mm | 15 mm | 4600 min-1 | 6000 min-1 | 0.240 kg | 4.9 kN | 38 kN |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (SAC1747B).
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1. Bore and housing bore dimensions
This product: Inner diameter d 17 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
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
This product: Limiting speed (grease lubrication) 6300 min-1The 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
A dedicated thrust angular contact ball bearing that supports the screw shaft of precision ball screws. Used in two-row, three-row, or four-row combinations, it combines high axial rigidity with low torque.
Features
- High rigidity
- No preload adjustment required with combinations
- Low torque
- Compact and lightweight
Applications
- Machine tools
- Precision ball screw support sections
FAQ
- Q. What applications can SAC1747B be used for?
- A. It is a dedicated thrust angular contact ball bearing that supports the screw shaft of precision ball screws, and is used in the ball screw support sections of machine tools.
- Q. Can SAC1747B be used alone, or is it used in combination?
- A. It is used in two-row, three-row, or four-row combinations. No preload adjustment is required when combined.
- Q. What are the dimensions and mass of SAC1747B?
- A. Bore diameter d is 17 mm, outside diameter D is 47 mm, width B is 15 mm, and mass is 0.130 kg.
- Q. What are the load and speed specifications of SAC1747B?
- A. Basic dynamic load rating Ca (single bearing) is 3.7 kN, and permissible axial load (two-row combination) is 25.5 kN. Limiting speed is 6300 min-1 with grease lubrication and 8000 min-1 with oil lubrication.
- Q. What are the features of SAC1747B?
- A. It has a 60° contact angle for high rigidity, combining high axial rigidity with low torque. It is a compact and lightweight design.
Written by AI based on the content of the source documents.
Source documents
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