Most Common Spherical Roller Bearing Dimensions

Bearings have become increasingly important, and spherical roller bearings have become even more so. However, the dimensions of spherical roller bearings must be understood well before they can be used.

Spherical roller bearings commonly come in a range of dimensions, including:

• 25mm x 52mm x 18mm

• 30mm x 62mm x 20mm

• 40mm x 80mm x 23mm

• 50mm x 110mm x 27mm

• 60mm x 130mm x 31mm

• 75mm x 160mm x 37mm

• 100mm x 180mm x 46mm

• 120mm x 215mm x 58mm
  

These dimensions cater to various industrial applications, ensuring robust performance and durability in demanding environments.

Different types of these bearings have unique dimensions that can be classified as follows:

Most Common Dimensions of Spherical Roller Bearings 

Here are the most familiar spherical roller bearing dimensions that you must know: 

Spherical Roller Bearings

Type Positioning Common Sizes

Type	Positioning	Common Sizes
Bore Diameter	The inner diameter of a particular bearing	25 mm, 30 mm, 35 mm etc.
Outer Diameter	The outer diameter of a bearing	90 mm, 100 mm, 110 mm etc.
Width	The  total width of the bearing	18 mm, 20 mm, 23 mm

Dimensions and Advantages

Bearing type Bore Diameter Outer Diameter Width Advantages

Bearing type	Bore Diameter	Outer Diameter	Width	Advantages
SKF 22212 EK	60 mm	110 mm	28 mm	Fits in with misalignments Heavy load carrying Higher resistance to ear
SKF 22314 EK	70 mm	150 mm	51 mm	Capable of relubricating  Less friction More service life
SKF 23120 CC/W33	100 mm	165 mm	52 mm	Self-aligning Increased wear resistance
FAG 22218-E1A-M-C3	90 mm	160 mm	40 mm	Compensates for alignment errors Handle high radial loads
NSK 2220 EAE4	100 mm	180 mm	46mm	Temperature resistance Can bare shock loads
Timken 22328 YMW33W800C4	140 mm	300 mm	102 mm	Resistance through extreme environments

Selections

• Load Ratings: When choosing a bearing for a specific job, its dynamic and static load ratings must be considered and checked. This depends on the application requirements.

• Speed Ratings: Your required operating conditions decide what reference and limiting speeds are needed. They should be checked and then decided.

• Misalignment Tolerance: The primary purpose behind spherical roller bearings is to consider the misalignments. These bearings should be able to accommodate whatever misalignments come in their way. Hence, they are tolerant of these malfunctions in the machinery.
  

Misalignment

• Manufacturer Specifications: Always refer to specific manufacturer catalogs to understand and decide the dimensions you are looking for. These also provide compatibility information, allowing you to make more informed decisions.

Series and Dimensions

The broader side of spherical roller bearing dimensions is divided into categories based on their measures. These series can be classified as:

Series Bore Diameter Outer Diameter Width Uses

Series	Bore Diameter	Outer Diameter	Width	Uses
22200 Series	20 mm to 100mm	47 mm to 200 mm	18 mm to 60 mm	These are most commonly seen in Gearboxes, Wind turbines, pulp and paper processing equipment, etc.
22300 Series	35 mm to 150 mm	80 mm to 320 mm	31 mm to 108 mm	These are used in primary metals, agricultural equipment, electric motors compressors, etc.
23000 Series	35 mm to 200 mm	62 mm to 420 mm	24 mm to 138 mm	Often used in heavy devices that are highly prone to misalignment (due to mounting).
23100 Series	40 mm to 150 mm	90 mm to 320 mm	31 mm to 104 mm	The 23100 series is seen in industrial gearboxes, paper and steel mills, etc.

Conclusion

The Spherical roller bearing dimensions provide an overview of the sizes available and the applications each one has. While we know what these bearings are for, choosing the right bearing is crucial. But this must be covered by more than knowing what dimensions are available. 

You have to go out in the market and explore for yourself. See what the brand says about the relationship between the bearings and their sizes.  The manufacturer's catalog answers your question: "Which spherical roller bearing should you use?"

Hence, the two steps to making informed decisions concerning spherical roller bearing dimensions are knowing the different sizes and their applications and understanding what the market has and what the manufacturer offers.

Read also: 4 Essential Tips for Extending the Life of Your Bearings

FAQs

1. How do I choose which spherical roller bearing to use?

A. Multiple factors determine which spherical roller bearing dimensions you should use. One of the most common is the minimum load of the application you are looking for. The roller must have a minimum axial load to operate at higher speeds and have regular acceleration and deceleration.

2. What are joint ball-bearing dimensions?

A. Ball bearings are available in various sizes, each with a different application. The 6200 and 6300 series are the most commonly used, ranging from 10* 30* 9 mm to 150* 320* 65 mm.

3. Why use spherical roller bearings? 

A. One must consider spherical roller bearings for callous and harsh conditions. These are best for highly demanding environments. The spherical roller bearings are adaptable to misalignments and defections that these conditions come with.

4. What are the disadvantages of spherical bearings?

A. Even though these bearings are highly accommodative and can fix misalignments, they come with certain disadvantages. They have a lower limit speed and comparatively higher speed of the starting friction.

5. How do you measure a spherical bearing?

A. Try using a surface profilometer to get the spherical roller bearing dimensions. These allow you to get an accurate measurement of the form and radius. However, while measuring the axis, you must place the part correctly to avoid misjudgments. This could easily lead to significant measurement errors, hence not giving you the correct sizes.

6. What is the angle of the spherical roller bearing?

A. The spherical roller bearings can handle dynamic adjustments up to 1.5° to 2°.