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Design Units:

Bore:

Outside Diameter:

Outer Ring Width:

Rated Speed (Oil):

Static Radial Load:

Dynamic Radial Load:

Bearing Design:

Bearing Class:

Stainless Steel?

Plastic?

Ceramic Balls?

Plated?

Seals / Shielding:

Help with Thin-section Bearings specifications:

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 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 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 1 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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Bearing Design
   Bearing Design:       
   Your choices are...         
   Conrad / Deep Groove
Radial contact bearings (Deep Groove Bearings)Courtesy of Timken Super Precision
 
     The balls rotate in a deep groove machined into the inner and outer races. A cage maintains ball clearance and complement.  This type of bearing exhibits a good radial load capacity, a fair axial load capacity, and a fair capability to resist misalignment. 
   Double Row Deep Groove
Ball Bearing (a) (drawing)Courtesy of CCTY Bearing
 
     This bearing style is a modified version of the single-row deep groove ball bearing with the addition of a second row of balls. This design increases its ability to carry radial and thrust loads.  Though using the same radial mounting space as the single-row style, its increased width limits the ability of this bearing to accommodate misalignment. 
   One Directional Thrust
Angular Contact BearingCourtesy of Timken Super Precision
 
     Tolerates some misalignment. Same radial load as deep-groove bearings, but 2-3 times the thrust load. 
   Duplex Thrust       Two matching-ground, one-directional thrust bearings used as a set.  They are typically used for two-directional thrust loads or very high one-directional thrust loads. Three duplex mounting arrangements are possible. 
   Four Point Contact       Single-row angular contact bearings are designed so that the ball has four contact points, two with the outer race and two with the inner race. Four-point contact ball bearings carry radial and axial loads, as well as moment loads in a relatively small space. However, they are intended mainly for axial loads. 
   Single-Row Tapered
Taper Roller Bearings (drawing)Courtesy of CCTY Bearing
 
     Tapered roller bearings consist of an inner ring (cone), an outer ring (cup), a cage, and rollers, which are profiled to distribute the load evenly across the roller. They have high radial and axial (thrust) load capacity at low to intermediate speeds. The thrust load capacity for single-row tapered bearings is about 60% of the radial capacity. 
   Cylindrical
Cylindrical Roller Bearings (drawing)Courtesy of CCTY Bearing
 
     Cylindrical roller bearings have high radial load capacity and moderate thrust loads. They contain rollers that are cylindrical in shape. The rollers are not true cylinders; they are crowned or end relieved to reduce stress concentrations. This geometry translates to low friction and high-speed applications.  Cylindrical roller bearings are commonly available in precision grades (RBEC-5). Lubrication for cylindrical roller bearings is usually oil, which also serves as a coolant. 
   Crossed       Cross roller bearings consist of rollers with an axis of rotation that is alternately crossed between a split outer ring and an inner ring. These bearings are capable of handling complicated loads (radial, thrust, and moment loads). 
   Other       Unlisted, unspecified, or proprietary configuration. 
   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 definied by ISO 492, JIS B1514 and DIN 620.  ABEC bearing ratings were extablished 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 extablished by the Roller Bearing Engineering Committee (RBEC) of the American Bearing Manufacturers Association (ABMA).  There re 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 / RBEC 1 / Class 0 / P0       ABEC 1, RBEC 1, Class 0 and P0 bearings are designed for use in lower speed and accuracy applications. 
   ABEC 3 / RBEC 3 / Class 6 / P6       ABEC 3, RBEC 3, Class 6 and P6 bearings are designed for use in lower speed and accuracy applications. 
   ABEC 5 / RBEC 5 / Class 5 / P5       ABEC 5, RBEC 5, Class 5 and P5 bearings are designed for use in higher speed and accuracy applications. 
   ABEC 7 / RBEC 7 / Class 4 / P4       ABEC 7, RBEC 7, Class 4 and P4 bearings are designed for use in higher speed and accuracy applications. 
   ABEC 9 / RBEC 9 / Class 2 / P2       ABEC 9, RBEC 9, Class 2 and P2 bearings are considered super precision and are designed for use in critical, high-tech applications. 
   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.
   Tapered Roller Bearing Class      Tapered roller bearing precision and accuracy standards determine bearing tolerances.  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 Standards 19.1 (metric series) and 19.2 (inch series).  Similar standards are definied by ANSI B3.19, ISO 578, JIS B1514 and DIN 620. 
   Your choices are...         
   Class 4 / Class K / P0       The lowest quality class is Class 4 (ABMA), Class K (ISO) and P0 (DIN). These bearings are considered standard quality and are intended for slower speed and lower accuracy applications. 
   Class 2 / Class N / P6       Class 2 (ABMA). Class N (ISO) and Class P6 (DIN) is the next higher class above Class 4 / Class K / P0, having slightly tighter tolerances. They are considered standard quality and intended for lower speed and accuracy applications. 
   Class 3 / Class C / P5       Class 3 (ABMA), Class C (ISO), and Class P5 (DIN) bearings are the lowest class of precision grade tapered roller bearings. These bearings are designed for higher speed and accuracy applications than standard class bearings. 
   Class 0 / Class B / P4       Class 0 (ABMA), Class B (ISO), and Class P4 (DIN) bearings are precision grade tapered roller bearings designed for higher speed and accuracy applications than standard class bearings. 
   Class 00 / Class A / P2       Class 00 (ABMA), Class A (ISO), and Class P2 (DIN) bearings are precision grade tapered roller bearings designed for higher speed and accuracy applications than standard class bearings. 
   Class 000 / Class AA       Class 000 (ABMA) and Class AA (ISO) bearings are the highest precision grade tapered roller bearings designed for use in critical, high-tech applications.. 
   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.
   Other       Other, unlisted quality rating. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Tables:         
          

Bearing Standard

Tolerance Class

Bearing Types

ABMA

 

ANSI

ABMA/ANSI Std. 20

ABEC-1 RBEC-1

ABEC-3 RBEC-3

ABEC-5 RBEC-5

ABEC-7

ABEC-9

Radial bearings (except tapered roller bearings)

ABMA/ANSI Std. 19.1

Class K

Class N

Class C

Class B

Class A

Tapered roller bearings (Metric series)

ANS B3.19 ABMA Std. 19

Class 4

Class 2

Class 3

Class 0

Class 00

Tapered roller bearings (Inch series)

ABMA/ANSI Std. 12.1

--

Class 3P

Class 5P Class 5T

Class 7P Class 7T

Class 9P

Precision instrument ball bearings (Metric series)

ABMA/ANSI Std. 12.2

--

Class 3P

Class 5P Class 5T

Class 7P Class 7T

Class 9P

Precision instrument ball bearings (Inch series)

ISO

ISO 492

Normal class Class 6X

Class 6

Class 5

Class 4

Class 2

Radial bearings

ISO 199

Normal class

Class 6

Class 5

Class 4

--

Thrust ball bearings

ISO 578

Class 4

--

Class 3

Class 0

Class 00

Tapered roller bearings (Inch series)

ISO 1224

--

--

Class 5A

Class 4A

--

Precision instrument bearings

JIS

JIS B 1514

Class 0 Class 6X

Class 6

Class 5

Class 4

Class 2

All types

DIN

DIN 620

P0

P6

P5

P4

P2

All types

ABMA - American Bearing Manufacturers Association                  (ABEC-Ball Bearings, RBEC-Roller Bearings) ANSI- American National Standards Institute ISO- International Organization for Standardization JIS- Japanese Industrial Standards DIN- Deutsch Industrie Norm

 
          

Standard ABEC Tolerances Inner Rings (all tolerances in micrometers)

Bearing Bore (mm)

Bore Diameter* +.00mm to

Width Variation

Radial Runout

Side Runout with Bore

Raceway Runout with Side

Width Inner & Outer Rings

ABEC Rating

1

3

5

7

9

3

5

7

9

1

3

5

7

9

3

5

7

9

3

5

7

9

1-3-5-7

9

0 - 10

-3

-2

-2

-1.5

-1

3

2

1

.5

3

2

1.5

1

.5

3

3

1

.5

6

3

1

.5

-50

-10

10 - 18

-3

-2

-2

-1.5

-1

4

2

1

.5

4

3

1.5

1

.5

4

3

1

.5

6

3

1

.5

-50

-20

 
          

Standard ABEC Tolerances Outer Rings (all tolerances in micrometers)

Bearing O.D. (mm)

Outside Diameter* +.00mm to

Width Variation

Radial Runout

Raceway Runout with Side

Outside Diameter Runout with Side

ABEC Rating

1

3

5

7

9

3

5

7

9

1

3

5

7

9

3

5

7

9

3

5

7

9

0 - 18

-4

-3

-2

-2

-1

4

2

1

.5

6

4

2

1.5

.5

8

3

2

.5

4

3

1.5

.5

18 - 30

-4

-3

-2

-2

-1.5

4

2

1

.5

6

4

2

1.5

1

8

3

2

1

4

3

1.5

.5

 
          

Bearing Standard

Tolerance Class

Bearing Types

AFBMA

 

ANSI

AFBMA/ANSI Std. 20

ABEC-1 RBEC-1

ABEC-3 RBEC-3

ABEC-5 RBEC-5

ABEC-7

ABEC-9

Radial bearings (except tapered roller bearings)

AFBMA/ANSI Std. 19.1

Class K

Class N

Class C

Class B

Class A

Tapered roller bearings (Metric series)

AFBMA B 3.19 ANSI Std. 19

Class 4

Class 2

Class 3

Class 0

Class 00

Tapered roller bearings (Inch series)

AFBMA/ANSI Std. 12.1

--

Class 3P

Class 5P Class 5T

Class 7P Class 7T

Class 9P

Precision instrument ball bearings (Metric series)

AFBMA/ANSI Std. 12.2

--

Class 3P

Class 5P Class 5T

Class 7P Class 7T

Class 9P

Precision instrument ball bearings (Inch series)

ISO

ISO 492

Normal class Class 6X

Class 6

Class 5

Class 4

Class 2

Radial bearings

ISO 199

Normal class

Class 6

Class 5

Class 4

--

Thrust ball bearings

ISO 578

Class 4

--

Class 3

Class 0

Class 00

Tapered roller bearings (Inch series)

ISO 1224

--

--

Class 5A

Class 4A

--

Precision instrument bearings

JIS

JIS B 1514

Class 0 Class 6X

Class 6

Class 5

Class 4

Class 2

All types

DIN

DIN 620

P0

P6

P5

P4

P2

All types

AFBMA - Anti-friction Bearing Manufacturers Association                  (ABEC-Ball Bearings, RBEC-Roller Bearings) ANSI- American National Standards Institute ISO- International Organization for Standardization JIS- Japanese Industrial Standards DIN- Deutsch Industrie Norm

 
          

Standard ABEC Tolerances Inner Rings (all tolerances in micrometers)

Bearing Bore (mm)

Bore Diameter* +.00mm to

Width Variation

Radial Runout

Side Runout with Bore

Raceway Runout with Side

Width Inner & Outer Rings

ABEC Rating

1

3

5

7

9

3

5

7

9

1

3

5

7

9

3

5

7

9

3

5

7

9

1-3-5-7

9

0 - 10

-3

-2

-2

-1.5

-1

3

2

1

.5

3

2

1.5

1

.5

3

3

1

.5

6

3

1

.5

-50

-10

10 - 18

-3

-2

-2

-1.5

-1

4

2

1

.5

4

3

1.5

1

.5

4

3

1

.5

6

3

1

.5

-50

-20

 
         

Standard ABEC Tolerances Outer Rings (all tolerances in micrometers)

Bearing O.D. (mm)

Outside Diameter* +.00mm to

Width Variation

Radial Runout

Raceway Runout with Side

Outside Diameter Runout with Side

ABEC Rating

1

3

5

7

9

3

5

7

9

1

3

5

7

9

3

5

7

9

3

5

7

9

0 - 18

-4

-3

-2

-2

-1

4

2

1

.5

6

4

2

1.5

.5

8

3

2

.5

4

3

1.5

.5

18 - 30

-4

-3

-2

-2

-1.5

4

2

1

.5

6

4

2

1.5

1

8

3

2

1

4

3

1.5

.5

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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, 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.
   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 has one seal to prevent the ingress of dirt. 
   Double Seal       Bearing has two seals to prevent the ingress of dirt. 
   Single Shield       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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