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Roller Bearing Type:

Split Bearing?

Thin-section?

Bore:

Outside Diameter:

RBEC Rating:

Tapered Roller Bearing Class:

Overall Width:

Rated Speed (Oil):

Static Axial / Thrust Load:

Static Radial Load:

Dynamic Axial / Thrust Load:

Dynamic Radial Load:

Features:

Help with Roller Bearings specifications:

Bearing Design
   Roller Bearing Type:       
   Your choices are...         
   Cylindrical
Cylindrical Roller Bearings (drawing)Courtesy of CCVI USA
 
     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). 
   Single-Row Tapered
Taper Roller Bearings (drawing)Courtesy of CCVI USA
 
     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. 
   Two-Row Tapered       Two-row or double-row tapered roller bearings have increased radial load capacity compared to single-row bearings. They can also handle thrust loads from both directions. The rollers can be configured in a converging or a diverging orientation. In converging double-row tapered bearings, the contact lines of the rollers to the races converge towards the axis of the bearing rotation. This style does not appreciably increase the rigidity of the shaft mounting. In diverging double-row tapered bearings, the contact lines of the rollers to the races diverge towards the axis of the bearing rotation. This style increases the rigidity of the shaft mounting. Different configurations are also available with a single outer ring and two inner rings or two outer rings and a single inner ring. 
   Four-Row Tapered       Four-row tapered bearings consist of four rows of alternating, converging, and diverging rollers. 
   Spherical
Roller Bearings (drawing)Courtesy of CCVI USA
 
     Spherical roller bearings are self-aligning, double-row, combination, radial, and thrust bearings. The rolling element is a spherical or crowned roller. The outer ring has a spherical race that allows for some misalignment of the shaft and housing.  They are unequalled in their capacity for high loads and tolerance to shock loads, but have limited speed capabilities. 
   Spacer Assembly       Spacer bearings are two single-row bearings purchased as a matched set. These bearings can be assembled together with the addition of spacers between the inner rings, the outer rings, or both the inner and outer rings. 
   Cylindrical Roller Thrust       Cylindrical roller thrust bearings consist of a roller and cage assembly. They can be assembled against hardened flat surfaces or with hardened thrust washers. They tolerate much higher loads than thrust needle roller assemblies. 
   Spherical Roller Thrust       Spherical roller thrust bearings have a spherical raceway in the outer ring. The rollers are arranged diagonally in single row. Spherical roller bearings have a high axial load capacity and can take moderate radial loads (when an axial load is applied). Due to the nature of the spherical rollers, they can handle some misalignment. 
   Tapered Roller Thrust       Tapered roller thrust bearings have conically-shaped (tapered) rollers and are designed for heavy axial load applications. Tapered roller thrust bearings are available with a cage or in a full complement design. 
   Hollow Roller       Hollow roller bearings are single-row or double-row radial bearings with an inner ring, an outer ring and hollow or thin-wall rollers.  The thin wall in the rollers allows these bearings to be preloaded, as opposed to cylindrical roller bearings with solid rollers. This increases radial stiffness and reduces radial vibration and radial run out. Proper lubrication is critical for proper operation and bearing life. These bearings are used on turbine shafts as well as grinding, milling, and workhead spindles where precision and stiffness are a requirement. 
   Needle Roller Without Inner       Needle roller bearings are cylindrical roller bearings where the rolling element is long and thin relative to its diameter. These bearings have low cross sections but high radial load carrying capacity. This type has an outer ring, needle rollers, and a cage, but no inner ring. 
   Needle Roller With Inner       Needle roller bearings are cylindrical roller bearings where the rolling element is long and thin relative to its diameter. These bearings have low cross sections but high radial load carrying capacity. This type has an outer ring, needle rollers, a cage, and an inner ring. 
   Needle Roller and Cage Assembly       These bearings consist of needle rollers and a cage. They have no integral inner or outer rings. They can be used with a hardened shaft and housing, or separate, hardened inner and outer rings. 
   Drawn Cup Caged Needle       Drawn cup needle bearings consist of needle rollers in a housing drawn from a single sheet of steel. 
   Full Complement Drawn Cup Needle       Full-complement drawn cup needle bearings consist of a full complement (no cage) of needle rollers in a housing drawn from a single sheet of steel. 
   Combined Needle Roller       These bearings combine needle roller radial bearings with a ball or roller thrust bearing. These bearings can be used for combined radial and axial loading applications. 
   Slewing Ring / Turntable Bearing       These bearings can accommodate axial, radial and moment loads. They are not mounted in housing or on a shaft, but instead are mounted directly to a seating surface. The inner and outer rings are supplied with mounting holes. The inner ring, outer ring, or both may have integral gears. These bearings are referred to as tabletop bearings, turntable bearings, and slewing rings. 
   Combined Roller (with Stub Axle)       Bearing is a combination of a radial bearing and an axial bearing.  A stub axle holds both the radial and axial bearing in place and provides an easy welding point. 
   Mast Guide Bearing       Mast guide bearings are heavy-duty bearings designed for use in forklift applications. 
   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.
   Split Bearing       Bearing and housing are completely split around the shaft for easy bearing replacement and inspection. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Thin-section       Thin-section bearings have small cross sections with respect to their diameter. They are designed to save space, lower the weight of a design, and reduce friction. Some thin-section bearings are also referred to as torque tube bearings. 
   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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Bore Size
   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.
   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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Outside Diameter
   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.
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ANSI / AFBMA Quality Standards 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).
   RBEC Rating:
Cylindrical Roller Bearings (drawing)Courtesy of CCVI USA
 
     RBEC (Roller Bearing Engineers' Committee) ratings classify different accuracy and tolerance ranges for bearings. The higher the RBEC number the tighter the bearing tolerances. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Tapered Roller Bearing Class:
Taper Roller Bearings (drawing)Courtesy of CCVI USA
 
     The ANSI bearing class for tapered roller bearings that indicate the bearing tolerance. Classes 4, 2, 3, 0 and 00 are for inch-series bearings. Classes K, N, C, B, and A are for metric-series bearings. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Tables:         
          

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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More Specs 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.
   Overall Width       Enter the overall width of the bearing or bearing assembly, including the locking collar (if present). 
   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.
   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 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.
   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.
   Features       
   Your choices are...         
   Flanged       The bearing has a flange for mounting or locating. 
   Spherical Outside Diameter       The bearing is tolerant of misalignment and has a greater load capacity than internal self-alignment, but requires more radial space. 
   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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