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Ball Bearing Types:

Design Units:

Bore:

Outside Diameter:

Outer Ring Width:

Rated Speed (Oil):

Static Axial / Thrust Load:

Static Radial Load:

Dynamic Axial / Thrust Load:

Dynamic Radial Load:

Stainless Steel?

Plastic?

Ceramic Balls?

Ceramic Races?

Plated?

Seals / Shielding:

Bearing Class:

Flanged?

Help with Miniature Bearings and Instrument Bearings specifications:

Bearing Design
   Ball Bearing Types:       
   Your choices are...         
   Radial Ball Bearing
Radial contact bearings (Deep Groove Bearings)Courtesy of Timken Super Precision
 
     Radial, or deep groove bearings, can take radial and axial loads to varying degrees but are used when the primary load is in the radial direction. They consist of an inner ring, an outer ring, balls and sometimes a cage to contain and separate the balls. 
   Angular Contact Ball Bearing
Angular Contact BearingCourtesy of Timken Super Precision
 
     Angular contact bearings are designed such that a contact angle between the races and the balls is formed when the bearing is in use. The major design characteristic of this type of bearing is that one or both of the ring races have one shoulder higher than the other. In order for these bearings to function properly, they must be assembled with a thrust load. This loading (or preload) creates a line of contact (or contact angle) between the inner race, the ball and the outer race. The preload can be built in to the bearing or created when the bearing is inserted into an assembly. The contact angle varies from 15° to 40° and is measured relative to a line running perpendicular to the bearing axis. Angular contact bearings are one-directional thrust bearings that can withstand heavy thrust loads and moderate radial loads. 
   Thrust Bearing
Thrust BearingCourtesy of Timken Super Precision
 
     Thrust ball bearings are designed for pure thrust loads. These bearings can handle little or no radial loads. The rolling element can be a ball, needle or roller. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Dimensions
   Design Units:      Unit designation for O.D., I.D., etc.
   Your choices are...         
   Inch       Units are inches or fractions of an inch. 
   Metric       Units such as millimeters or centimeters. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Bore       The bearing industry uses a standard numbering system for bearings with metric-diameter bores. If the bore is hexagonal, enter the dimension across the flats. If the bore is tapered, enter the smaller diameter. For bore sizes 04 and up, multiply the bore size by 5 to identify the bore diameter in millimeters (mm). Refer to the table below. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Outside Diameter       Enter the outside diameter of the bearing. For housed bearings, include the housing. For flanged bearings, exclude the flange. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Outer Ring Width:       The width of the outer ring. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Tables:         
   Bore Size (does not list all possible sizes)     

Bore Size

Dimension (mm)

00

10mm

01

12mm

02

15mm

03

17mm

04

20mm

05

25mm

06

30mm

07

35mm

08

40mm

09

45mm

10

50mm

11

55mm

12

60mm

13

65mm

14

70mm

15

75mm

16

80mm

17

85mm

18

90mm

19

95mm

20

100mm

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Operating Specifications Do not over-specify. Enter only those loads that apply for bearing type and application. Static and dynamic loads may not be available for all bearing types and suppliers.
   Rated Speed (Oil)       The rated speed for a bearing with grease lubrication is lower than that of a bearing with oil lubrication. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Static Axial / Thrust Load       Static axial (thrust) load is the maximum axial load a bearing can endure without excessive, permanent deformation. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Static Radial Load       Static radial load is the maximum radial load a bearing can endure without excessive, permanent deformation. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Dynamic Axial / Thrust Load       Dynamic axial (thrust) load is the calculated, constant, axial load which a group of identical bearings can endure theoretically for a rating life of one million revolutions of the inner ring. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Dynamic Radial Load       Dynamic radial load is the calculated, constant, radial load which a group of identical bearings can endure theoretically for a rating life of one million revolutions of the inner ring. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Special Material / Plating Options
   Stainless Steel       Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Plastic       Any of numerous organic, synthetic or processed materials that are mostly thermoplastic or thermosetting polymers of high molecular weight and that can be made into objects, films, or filaments. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Ceramic Balls       A ceramic hybrid bearing is constructed of steel inner and outer rings with ceramic (typically Si3N4 balls in place of steel. These bearings have several advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, higher accuracy, lower friction and heat generation, reduced lubrication requirements, low thermal expansion and extended operating life. Bearings containing all ceramic balls are also nonconductive and are commonly used in electric motor applications. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Ceramic Races       Bearing races are constructed of ceramic (typically Si3N4). 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Plated       Bearing is plated; common plating materials are cadmium and chrome. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Seals / Shielding
   Seals / Shielding:      Seals and shields provide protection from contamination and as a retainer for lubricant. Seals provide better protection and lubricant containment than shields, but have lower maximum speed capabilities.
   Your choices are...         
   None (Open Bearing)       Bearing is open; it has no seals or shields. Open bearings offer no protection from contamination or lubricant containment, but have higher maximum speed capabilities than bearings with seals or shields. 
   Single Seal
Bearing Diagram pointing out seal(click to enlarge)Courtesy of GlobalSpec, Inc.
 
     Bearing has one seal to prevent the ingress of dirt. 
   Double Seal       Bearing has two seals to prevent the ingress of dirt. 
   Single Shield
Bearing Diagram pointing out shield(click to enlarge)Courtesy of GlobalSpec, Inc.
 
     Bearing has one shield to prevent the ingress of dirt. 
   Double Shield       Bearing has two shields to prevent the ingress of dirt. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Bearing Class ANSI: American National Standards Institute AFBMA: Anti-Friction Bearing Manufacturers Association ABEC: Annular Bearing Engineers Committee RBEC: Roller Bearing Engineers Committee Refer to tables below for quality standards and cross reference to other standards organizations.  Note: Stretch window to resize table(s).
   Bearing Class      Many organizations have developed standards, including the American Bearing Manufacturers Association (ABMA), International Organization for Standardization (ISO) and the Deutsches Institut für Normung (DIN).  ABEC and RBEC standards are defined by ABMA Standard 20. Similar standards are defined by ISO 492, JIS B1514 and DIN 620.  ABEC bearing ratings were established by the Annular Bearing Engineering Committee (ABEC) of the American Bearing Manufacturers Association (ABMA).  There are five classes of bearings in the ABEC rating system - 1, 3, 5, 7, and 9.  The higher the ABEC rating, the tighter the tolerances and the higher the bearing precision.  ABEC 1 bearings are designed for use in lower speed and accuracy applications. RBEC bearing ratings were established by the Roller Bearing Engineering Committee (RBEC) of the American Bearing Manufacturers Association (ABMA).  There are five classes of bearings in the RBEC rating system - 1, 3, 5, 7, and 9.  The higher the RBEC rating, the tighter the tolerances and the higher the bearing precision.  RBEC ratings apply to cylindrical roller and spherical roller bearings.  RBEC 1 bearings are designed for use in lower speed and accuracy applications. Although the specifications may differ slightly, the following equivalency can be made between ABMA, ISO and DIN bearing classes. ANSI Standard 20 / ISO 492 / DIN 620 ABEC 1 / Class Normal / P0 ABEC 3 / Class 6 / P6 ABEC 5 / Class 5 / P5 ABEC 7 / Class 4 / P4 ABEC 9 / Class 2 / P2
   Your choices are...         
   Unground Bearing       Unground bearings include bearings that are totally unground, partially unground and have precision levels less than ABEC 1. 
   ABEC 1 / Class 0 / P0       ABEC 1, Class 0 and P0 bearings are designed for use in lower speed and accuracy applications. 
   ABEC 3 / Class 6 / P6       ABEC 3, Class 6 and P6 bearings are designed for use in lower speed and accuracy applications. 
   ABEC 5 / Class 5 / P5       ABEC 5, Class 5 and P5 bearings are designed for use in higher speed and accuracy applications. 
   ABEC 7 / Class 4 / P4       ABEC 7, Class 4 and P4 bearings are designed for use in higher speed and accuracy applications. 
   ABEC 9 / Class 2 / P2       ABEC 9, Class 2 and P2 bearings are considered super precision and are designed for use in critical, high-tech applications. 
   Other       Other, unlisted quality rating. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Features
   Flanged
Radial Retainer High Speed Flanged BearingCourtesy of Timken Super Precision
 
     The bearing has a flange for mounting or locating. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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