Things to Know About Deep Groove Ball Bearings

23 Sep.,2024

 

Things to Know About Deep Groove Ball Bearings

Things to Know About Deep Groove Ball Bearings

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Oct 22,

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Deep groove ball bearing is one of the most commonly used bearing types due to easy accessibility, low friction, and versatility. These bearing types are used in different industries, from high precision apparatus to heavy machinery. They are ideal for applications with high rotational speeds. Deep groove ball bearings look like traditional bearings but come with raceways that perfectly fit the ball dimension that runs in them. These bearing types have an outer ring and inner ring and a cage having balls and ball bearings. Due to the even surface on inner and outer rings, deep groove ball bearings give a bigger area of contact, delivering high load capacity and better performance. These bearing types work with reduced noise and vibration while providing strength to bear axial load. Here is everything you need to know about deep groove ball bearings.

Applications

Deep groove ball bearings are widely used in the modern industry and are perfect for high-speed applications. Available in different models, these bearing types are fast and easy to reach the precision of product manufacture. Though they can be customized, the variety of models makes these bearings very popular in various industries. These bearing types can be used in the following machines and industries.

· Wind Energy

· Agricultural

· Machine Tool

· Electric Motors

· Gearboxes

· Food Processing

· Printing

· Material Handling

· Medical

· Pumps

· Railway and Transportation

Benefits of Deep Groove Ball Bearings

Deep groove ball bearings are used in high-speed and very high-speed applications without demanding frequent maintenance. Apart from being versatile, these bearing types offer several benefits, including:

1. Reduced Cost

These bearing types create less friction torque. It helps reduce the operating temperature (helpful for boosting the life of the bearing) and cut down the energy cost of running equipment. Those looking for the budget-friendly option should go for it.

2. Versatility

Versatility is an apt answer to why deep groove ball bearings are used in different industries. As they can bear both axial and radial loads, they are used in multiple applications.

3. Minimum service or maintenance needs

Because of their simple design, low friction, and reduced operating temperature, deep groove ball bearings have an extended shelf life, unlike other bearing types. They do not need extra greasing or lubrication post-installation, which also ensures less maintenance downtime.

4. Quiet operation

Deep groove ball bearings have reduced friction and are optimized for low vibration and noise. They deliver a quieter operation with guaranteed excellent performance.

Types of Deep Groove Ball Bearings

Single-Row Deep Groove Ball Bearings

Available with a single raceway, deep groove ball bearings are strong and made from durable materials, giving them a longer service life. Subdivided into other types &#; 3 mm to 400 mm sizes, single-row deep groove ball bearings are suitable for many applications.

Double-Row Deep Groove Ball Bearings

With the double-row design, these bearing types are intended for applications demanding higher load carrying capacity while retaining low friction. These bearings are a little wider than single-row bearings, making them versatile and practical.

In addition, stainless steel deep groove ball bearings and single row deep groove ball bearings with filling slots are two other variants of these bearing types. For enhanced performance, durability, and the best prices, always choose a reliable company like SKF to buy deep groove ball bearing.

How to Select the Right Bearing (Part 1)

In previous Bearing Trivia entries, we introduced the fact that bearings are used in many machines and are a very important machine component. We focused in those columns on topics like bearing structure and so on.

"What's the Structure of the Bearing? The role of the structure and parts in reducing friction"
"What Are the Differences Between Bearings? The various types and special features of bearings"

When designing a machine, it is important to select the bearing that is right for that machine.

If you are looking for more details, kindly visit skf.

JTEKT has published a guide for selecting the right bearing in its Ball & Roller Bearings Catalog, but the catalog uses a large number of technical terms and is very long, so many people seem to have trouble handling it.

That's where this column comes in. We will explain the key points for selecting the type of bearing that is right for your machine.

The catalog uses the terms "bearing" and "rolling bearing" interchangeably. This column does not use the term "rolling bearing" as a general rule.

1. What are the criteria for selecting bearings?

Bearings come in a variety of types, and their sizes can range from just a few millimeters to over ten meters in diameter.&#;

Fig. 1: Extra-small (miniature) bearings

Fig. 2: Ultra large slewing rim bearing for tunnel excavators

When selecting from among these many varied types of bearings, the bearing that is right for your machine, the following two criteria are very important.

  • Criterion 1: It should be appropriate for the machine's usage environment and the operating condition that is being demanded of the bearing
  • Criterion 2: It should be easy to acquire replacement bearings and it should facilitate maintenance/inspection of the machine

If these criteria are met, damage of the machine can be reduced, the time needed to replace the bearings when performing repairs can be shortened, and the machine can be used for a longer period of time.

In this way, selecting the appropriate bearing will lead to machine design that is economically superior!

2. The order of priority for selecting bearings

In the "How to Select the Right Bearing" columns, we will select the optimal bearing based on the ordering shown in Table 1, below.

Please note that the following order is only a guideline.
When you actually select the bearing to use, the most important factors are past success history and points of improvement, so it is not necessary to follow this order to the letter.

Table 1: Bearing selection checklist

Order Examination item Major points to confirm &#; Bearing type What magnitude and direction of load do you need? Will it fit in the installation space?
<This is the focus of Part 4> &#; Bearing arrangement Are you using two (or more) bearings on a single shaft? &#; Bearing dimensions and service life Do the dimensions and service life satisfy your needs? &#; Bearing limiting speed, running accuracy, fits and internal clearance Does it have the necessary running accuracy and rigidity for the machine?
Does it have the fits and internal clearance to satisfy its service life? &#; Bearing preload and rigidity Does it have the necessary rigidity for the machine? &#; Bearing lubrication Can the bearing rotate stably over a long period of time? &#; Components around the bearing What bearing surrounding structure/assembly are you looking for? &#; Bearing mounting and dismounting Will it facilitate maintenance/inspection of the machine?

3. How to select the type of bearing

When designing a machine, most people first decide on the dimensions of the shaft to satisfy the strength requirement, and then select the bearing based on that.

1) If the load will be mostly radial (perpendicular to the shaft), use a radial bearing, and if the load will be mostly axial* (same direction as the shaft), use a thrust bearing. * Axial loads are sometimes called thrust loads.

2) If the load on the bearing will be light, use a ball bearing, and if it will be heavy, use a roller bearing.

Fig. 3: The radial and axial loads

Table 2: The various types of bearings and loads placed on bearings

Rolling element Ball Roller Direction in which load is mostly applied Perpendicular to the shaft
(

radial load

) Radial ball bearing Radial roller bearing The same direction as the shaft
(

axial load

) Thrust ball bearing Thrust roller bearing

Fig. 4: Radial bearings

Fig. 5: Thrust bearings

3) If a radial load and an axial load are both placed on a single bearing at the same time (combined load), a light combined load calls for a deep groove ball bearing or an angular contact ball bearing, while a heavy combined load calls for a tapered roller bearing.

Fig. 6: The radial and axial loads (combined load) applied to an angular contact ball bearing

If there is a heavy axial load being applied from both directions, you can combine two or more bearings, or use a double-row bearing.

Fig. 7: A matched pair of bearings (angular contact ball bearings)

Fig. 8: A double-row bearing (tapered roller bearing)

4. Bearing installation space

Our bearing catalog contains a table showing the boundary dimensions (dimensions required for bearing installation with shaft and housing) as in Table 3, below. Using the table of boundary dimensions, select a bearing type that will fit in the installation space based on the dimensions of the shaft or housing.

What is housing?

1) In the table of boundary dimensions, the dimensions such as bearing outside diameter and width (or height in the case of a thrust bearing), corresponding to a specific bearing bore diameter, are shown in series.

2) The "dimension series code" refers to a combination of the width series and the diameter series that has a stepped bearing outside diameter with respect to the bearing bore diameter.

Table 3: An example of the bearing boundary dimensions table (a spherical roller bearing)

Bearing type Bearing series code Type code Dimension series code Width series Diameter series Spherical roller bearing 239 2 3 9 230 2 3 0 240 2 4 0 231 2 3 1 241 2 4 1 222 2 2 2 232 2 3 2 213 2 0 3 223 2 2 3

Reference: Bearing series code

3) Even if a bearing has the same bore diameter, there are several types of width and outside diameter, so select the appropriate bearing from among them.
[see Fig. 9 a) ]

Some people choose bearings based on the outside diameter of the bearing that matches the dimensions of the housing.
[see Fig. 9 b) ]

Fig. 9: Bearings with the same bore diameter or the same outside diameter

Reference: Dimension series diagrams of radial bearings and thrust bearings

4) Select the bearing of diameter series 0, 2, or 3 from the example of Table 3. If the bearing installation space is limited due to the down-sizing of the machine, select a bearing of diameter series 9.

If the installation space is limited only in the radial direction, select a bearing with a width (or height in the case of a thrust bearing) series 2 or higher, or a double-row bearing. The width series is omitted for some bearing types (such as deep groove ball bearings), so please check the Ball & Roller Bearings Catalog for details. At this stage of selecting the bearing type, it is best not to limit yourself to one type, but to select multiple types.

5. Confirm the type of the bearing you select

Check that the type of bearing you have selected is generally appropriate by using the "Performance comparison of bearing type" (Table 4).

Table 4: Performance comparison of bearing type

Deep groove ball bearing Angular contact ball bearing Single-row Single-row Double-row Load
resistance Radial
load Axial
load &#; &#; Combined
load Vibration or
impact load High speed adaptabllity

Performance comparison of bearing type

Check that the type of bearing you have selected is generally appropriate by using the "Selected bearing type checklist" (Table 5).

Table 5: Bearing selection checklist

Order Examination item Major points to confirm &#; Bearing type What magnitude and direction of load do you need? Will it fit in the installation space?
<This is the focus of Part 4> &#; Bearing arrangement Are you using two (or more) bearings on a single shaft? &#; Bearing dimensions and service life Do the dimensions and service life satisfy your needs? &#; Bearing limiting speed, running accuracy, fits and internal clearance Does it have the necessary running accuracy and rigidity for the machine?
Does it have the fits and internal clearance to satisfy its service life? &#; Bearing preload and rigidity Does it have the necessary rigidity for the machine? &#; Bearing lubrication Can the bearing rotate stably over a long period of time? &#; Components around the bearing What bearing surrounding structure/assembly are you looking for? &#; Bearing mounting and dismounting Will it facilitate maintenance/inspection of the machine?

6. Conclusion

When selecting the bearing that is right for your machine, it is important that the bearing be appropriate for the requirements of the usage environment and that it be easily acquired for replacement. In the "How to Select the Right Bearing" columns, we will show you how to do this.
In this month's column, "How to select the type of bearing," we conveyed the following points:

  1. Select the right bearing type based on the magnitude and direction of the load.
  2. Select a bearing that matches the dimensions of the shaft or housing from the bearing boundary dimensions table.
  3. Check that the type of bearing you have selected is appropriate by using the "Performance comparison of bearing type" with the bearing usage criteria.