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Thrust ball bearing de contacto angular NTN 2A-BST20X47
- Manufacturer Part Number
- 2A-BST20X47
- Brand
- NTNOfficial distributor
- Category
- Bearings
- Subcategory
- Thrust ball bearings
- Series
- 2A-BST
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Description
NTN 2A-BST20X47 is a thrust ball bearing de contacto angular reference, within Bearings. Request a quote for 2A-BST20X47 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The NTN 2A-BST series thrust ball bearing is a precision component designed to support axial loads in one direction, with angular contact that allows it to handle high demands. It is used in applications requiring high axial rigidity and load capacity, such as machine tool spindles, rotary tables and precision equipment. Its single-row ball design and hardened steel rings ensure smooth, long-lasting operation. MR Accesorios Industriales sells this series backed by more than 80 years in the Argentine industrial market.
The 2A-BST series designation is interpreted as follows: the prefix 2A indicates a design variant with specific angular contact characteristics, while BST identifies the series of precision thrust ball bearings. The numbers that follow, as in the examples 2A-BST17X47 or 2A-BST40X90, correspond to the bore and outer diameter respectively, although both dimensions are not always explicitly stated. This nomenclature allows quick identification of the bearing's size and configuration for proper selection.
In Argentine industry, these bearings are used in machine tool main spindles, milling machine heads, grinding machines and machining centers, where high rotational precision and axial rigidity are required. They are also used in rotary tables of measuring equipment, in the automotive industry for testing devices and in robotics applications demanding precise movements. Their ability to support axial loads in one direction makes them ideal for assemblies where the load acts predominantly in one direction.
To correctly select a 2A-BST series thrust ball bearing, it is essential to consider the axial load it must support, the rotational speed and the lubrication conditions. Mounting requires precise alignment between the rings and the structure, as these bearings are sensitive to misalignment. Adequate lubrication is recommended, whether grease or oil, depending on the application, and the axial clearance should be verified to ensure optimal operation. Sealing will depend on the environment: in contaminated environments, additional protection should be provided.
Regarding equivalences and interchangeability, NTN 2A-BST series thrust ball bearings may be found with similar designations from other manufacturers, although dimensions and load capacities may vary. It is important to verify technical specifications before replacing one bearing with another of a different brand. If the customer has another brand's code or an unidentified part, at MR Accesorios Industriales we can indicate the compatible alternative or quote the exact code you need.
To request a quote for your NTN 2A-BST series thrust ball bearing, send the code or dimensions via WhatsApp to MR Accesorios Industriales. Our technical team will respond promptly with the information needed for your application.
This description provides guidance on the product type. Check the configuration and dimensions of this reference.
Dimensions
Dimensions and tolerances: Send us the part number via WhatsApp and we'll confirm dimensions, sealing, and internal clearance against the manufacturer's data sheet.
Frequently Asked Questions
- What are the typical applications of the NTN 2A-BST thrust ball bearing?
- It is used in machine tool spindles, rotary tables, measuring equipment and robotics, where high axial loads and high rotational precision are required. Also in automotive testing devices.
- How do I select the right 2A-BST thrust ball bearing?
- You must consider axial load, speed, lubrication and alignment. Mounting requires precision and verification of axial clearance. For contaminated environments, additional protection is recommended.
- Are NTN 2A-BST bearings interchangeable with other brands?
- Equivalents may exist in other brands, but dimensions and capacities may vary. If you have another brand's code or an unidentified part, at MR we indicate the compatible alternative or quote the exact code.

