Miniature Ball Bearings(nsk) - List of Manufacturers, Suppliers, Companies and Products

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Technical Data: Miniature Ball Bearings

Technical Data: Miniature Ball Bearings

Technical information on high-quality miniature ball bearings that achieve sub-micron high precision is provided.

This document contains various technical information about "miniature ball bearings," which have become essential components in the rotating parts of various devices. It includes various technical details related to miniature ball bearings, such as different conversion methods and material properties. [Contents] ■ Conversions from the International System of Units (SI) ■ N-kgf conversion table ■ Inch-mm conversion table ■ Hardness conversion table ■ Physical and mechanical properties of metallic materials ■ Basic tolerances and IT values ■ Comparison table of part numbers with other manufacturers like ISC/NSK *Please download and view the technical document from the link below.

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Bearing Technical Information: Materials

Bearing Technical Information: Materials

This introduces information about the raceway of bearings and the materials of rolling elements.

NSK Micro Precision develops, manufactures, sells, and provides services for unit products that combine miniature ball bearings, miniature ball bearings, and precision machined parts. The raceway and rolling elements of the bearing undergo rolling contact with sliding while repeatedly receiving contact pressure. Therefore, multiple properties are required for the materials of the bearing's raceway and rolling elements. 【Properties required for the materials of the bearing's raceway and rolling elements】 ■ High rolling fatigue strength ■ High hardness ■ High wear resistance ■ Good dimensional stability ■ High mechanical strength ■ Ease of processing ■ Heat and corrosion resistance depending on the application *For more details, please refer to the PDF document or feel free to contact us.

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Bearing Technical Information: Designation Number

Bearing Technical Information: Designation Number

This document introduces the contents and arrangement of the bearing's preliminary numbers.

This document introduces the "designation number" of bearings. The designation number for shaft bearings is a name that indicates the type of bearing, major dimensions, dimensional and rotational accuracy, internal clearance, and other specifications. It consists of a basic number and auxiliary symbols. The document includes a table showing the arrangement and content of the basic number and auxiliary symbols. 【Content included (partial)】 ■ Content and arrangement of bearing designation numbers *For more details, please refer to the PDF document or feel free to contact us.*

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Bearing Technical Information: Preload

Bearing Technical Information: Preload

It is important to appropriately choose the preload amount and preload method according to the application! An introduction to bearing preload.

This document explains the "preload" of bearings. When two bearings capable of receiving axial loads are installed as a pair, and a predetermined axial load F (preload) is always applied, this is referred to as applying preload. Bearings have internal clearances, but by applying preload, this clearance is eliminated, and the balls and raceways make elastic contact. As a result, the bearing is free from play due to clearance, which reduces vibrations and noise during rotation, and also increases the rigidity of the bearing. [Contents (partial)] ■ Preload methods ■ Magnitude and direction of preload *For more details, please refer to the PDF document or feel free to contact us.

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Bearing Technical Information: Accuracy of Main Dimensions and Rotational Accuracy

Bearing Technical Information: Accuracy of Main Dimensions and Rotational Accuracy

It introduces the accuracy of the main dimensions and rotational accuracy of bearings.

This document introduces the "accuracy of major dimensions and rotational accuracy" of bearings. The tolerances and permissible values for the major dimensions of small diameter ball bearings and miniature ball bearings, as well as rotational accuracy, comply with JIS B 1514 (Accuracy of Rolling Bearings) and ANSI/ABMA Std.12.2 (INSTRUMENT BALL BEARINGS INCH DESIGN). It also includes tables of tolerances and permissible values for the outer rings of ball bearings (metric system), as well as a list of major dimensions and symbols for rotational accuracy. [Included Tables (Partial)] ■ Tolerances and permissible values for the inner rings of ball bearings, as well as tolerances and permissible values for the width of the outer rings. *For more details, please refer to the PDF document or feel free to contact us.

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Bearing Technical Information: Fits and Clearances

Bearing Technical Information: Fits and Clearances

This introduces the "fit" and "gap" of bearings.

This document introduces the "fit and clearance" of bearings. The fit conditions for incorporating bearings into equipment are extremely important for fully realizing the performance of the equipment. Additionally, the size of the internal clearance during bearing operation significantly affects the performance of the bearing, including fatigue life, vibration, noise, and heat generation. Therefore, it is necessary to select an appropriate radial internal clearance considering the fit, bearing load, rotational speed, and bearing temperature during operation. Furthermore, the document includes tables and examples introducing the fit between the inner ring and the shaft, as well as the fit between the outer ring and the housing hole. [Content Overview (Partial)] ■ Fit *For more details, please refer to the PDF document or feel free to contact us.

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Bearing Technology Information: Bearing Life

Bearing Technology Information: Bearing Life

It introduces the lifespan of bearings, as well as the basic dynamic load rating and fatigue life.

This document explains the "lifetime of bearings." Even when rolling bearings are used correctly for a specific application, after a certain period of time, they may become unusable due to increased noise and vibration, decreased accuracy from wear, degradation of the lubricating grease, and fatigue of the rolling surfaces. The period until they can no longer be used is referred to as the broad definition of bearing lifetime, which includes terms such as acoustic lifetime, wear lifetime, grease lifetime, and rolling fatigue lifetime. Additionally, the basic dynamic rated load of bearings and fatigue lifetime are also explained using calculation formulas. [Content Overview (Partial)] ■ Lifetime of bearings ■ Basic dynamic rated load and fatigue lifetime *For more details, please refer to the PDF document or feel free to contact us.

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Bearing Technical Information: Allowable Rotational Speed

Bearing Technical Information: Allowable Rotational Speed

As bearing technical information, we introduce the permissible rotation speed of bearings.

Each bearing has a limit to its rotational speed. When a bearing is operated, as the rotational speed increases, the temperature rise due to friction heat inside the bearing becomes greater. The limit of rotational speed is an empirical allowable value that allows the bearing to continue operating without causing seizure or excessive heat generation beyond a certain limit. Therefore, the allowable rotational speed for each bearing varies depending on the type and dimensions of the bearing, the type and material of the cage, the bearing load, the lubrication method, the lubricant, and the cooling conditions surrounding the bearing. [Key Points] - Each bearing has a limit to its rotational speed. - The limit of rotational speed is an empirical allowable value that allows the bearing to continue operating without causing seizure or excessive heat generation beyond a certain limit. *For more details, please refer to the PDF document or feel free to contact us.*

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[Free Giveaway] Comprehensive Catalog of Miniature Ball Bearings

[Free Giveaway] Comprehensive Catalog of Miniature Ball Bearings

We offer over several hundred types of miniature ball bearings, ranging from a tiny size with an inner diameter of 1.0mm and an outer diameter of 3.0mm to sizes around an outer diameter of 20mm!

Miniature ball bearings are now essential components in the rotating parts of various equipment. As the downsizing of equipment progresses, there is an increasing demand for smaller, thinner, and quieter designs. NSK Micro Precision Co., Ltd. manufactures a variety of ball bearings tailored to meet these needs. ■ Size Types From ultra-small types with an inner diameter of 1.0mm and an outer diameter of 3.0mm to sizes around 20mm in outer diameter, including special types, there are hundreds of varieties. ■ Catalog Contents The "Miniature Ball Bearing Comprehensive Catalog" includes the most commonly used radial ball bearings composed of an inner ring, outer ring, balls, cage, and seals, such as "single-row deep groove ball bearings," deep groove ball bearings with a flange on one side of the outer ring, "flanged deep groove ball bearings," inch series deep groove ball bearings with a wider inner ring than the outer ring, "wide inner ring deep groove ball bearings," and deep groove ball bearings with a smaller outer diameter to inner diameter ratio than standard, "thin-walled deep groove ball bearings," among many others. ★ For more details, please download the catalog or contact us.

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