Deep groove ball bearings in
various designs according
to DIN 625
Whether deep groove ball bearings, miniature deep groove ball bearings, double-row ball bearings, thin-section ball bearings or ball bearings with a flange, all of these series can accommodate axial and radial forces.
The inner and outer rings, as well as the rolling elements, are made of through-hardened bearing steel or stainless steel with a very high degree of purity, ensuring a longer lifetime. The high-precision raceways, top-quality balls, and the design-related contact surface geometry ensure optimal friction and noise behavior as well as smooth running. Due to their low friction, deep groove ball bearings are suitable for both low and high speed ranges.
Standard - deep groove ball bearings
With the technical expertise of a manufacturer
Our decades of experience in manufacturing special designs of a wide variety of ball bearings helps us leverage this advantage profitably for you.
The production steps are the same as those we use in our own production. Therefore, it is easy for us to establish specifications for the production of these standard bearings, ensuring high quality and reliable function throughout their lifetime.
Designs and bearing series
We offer a wide range of standard bearings to meet your requirements.
Depending on the type, designed with solid outer and inner rings, mounted with simple shields or seals, our deep groove ball bearings are robust and easy to maintain.
Discover the versatility and diverse types of SKT deep groove ball bearings.
Miniature deep groove ball bearings
Single-row miniature deep groove ball bearings are one of the most commonly used bearing types, used in a variety of applications. Deep groove ball bearings with a bore diameter of < 10 mm are classified as “miniature bearings.”
Different series
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| MR | 3 – 4 | 8 – 14 |
| 6XX | 3 – 9 | 8 – 26 |
Deep groove ball bearings
Larger bearing series with a bore diameter ≥ 10 mm are referred to as standard deep groove ball bearings.
Different series
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| 60XX | 10 – 35 | 26 – 62 |
| 62XX | 10 – 30 | 30 – 62 |
| 63XX | 10 – 25 | 35 – 62 |
| 64XX | 17 | 62 |
Wide Designs
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| 622XX | 10 – 30 | 30 – 62 |
| 623XX | 10 – 25 | 35 – 60 |
Narrow Designs
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| 160XX | 15 – 35 | 32 – 62 |
| 161XX | 10 – 12 | 28 – 30 |
Thin-section ball bearings
Thin-section ball bearings are particularly characterized by their small cross-sections and low weight, which means that weight-saving and space-optimized designs can be realized with these bearing variants.
Different series
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| 68XX | 10 – 45 | 19 – 58 |
| 69XX | 10 – 40 | 22 – 62 |
Ball bearings with flanges
Deep groove ball bearings with flanges have a shoulder on the outer ring, allowing them to be secured axially against displacement. This design is available in the same bearing series as miniature, thin-section, and standard deep groove ball bearings. This design is designated with the prefix “F.”
Different series
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| F – MR | 3 – 4 | 8 – 14 |
| F – 6XX | 3 – 9 | 8 – 26 |
| F – 60XX | 10 – 35 | 26 – 62 |
| F – 62XX | 10 – 30 | 30 – 62 |
| F – 63XX | 10 – 25 | 35 – 62 |
| F – 64XX | 17 | 62 |
| F – 622XX | 10 – 30 | 30 – 62 |
| F – 623XX | 10 – 25 | 35 – 60 |
| F – 160XX | 15 – 35 | 32 – 62 |
| F – 161XX | 10 – 12 | 28 – 30 |
| F – 68XX | 10 – 45 | 19 – 58 |
| F – 69XX | 10 – 40 | 22 – 62 |
*The outer diameter refers to the main diameter D. The shoulder/flange F is additional and must be requested.
Double-row ball bearings
Double-row ball bearings have two rows of balls and are used for higher loads. The second row of balls can significantly increase the already high load ratings of single-row versions.
Different series
| Bearing Series | Ø Bore | Ø Outer |
|---|---|---|
| 42XX | 10 – 30 | 30 – 62 |
| 43XX | 12 – 25 | 37 – 62 |
Customized solutions
If our standard types do not meet your requirements, we are able to implement customized special solutions. Since the beginning of our company’s history, we have successfully developed and produced customized solutions, including…
Special solutions
- Special sizes and special dimensions
- Implementation of customized installation situations
- Custom branding
- Special lubricants
- Solutions for high-temperature applications
- Coatings, for example various different versions with zinc
Discover more about our special solutions here.
Technical Information
The following table provides information’s on additional technical specifications that apply to all our bearing types and series.
Bearing steel
This is the classic bearing steel 1.3505, which is used in cases of highest loads on deep groove ball bearings.
Stainless steels
Stainless steels have varying degrees of corrosion protection depending on the material. Since stainless steel is difficult to harden, its load capacity is lower than that of ball bearings made of bearing steel. We supply our stainless steel bearings as standard in AISI420, AISI440C, and AISI316L. For clear identification, these bearings are marked with the suffix ‘-SS’ for “stainless steel.”
If you require special materials for specific applications, we also look forward to your inquiry.
To meet the diverse requirements of different applications, deep groove ball bearings can be assembled with various seals. For special applications, they can also be supplied without a seal/cover (open). We distinguish between three main types of seals:
Steel sheet dust cover
The bearing is covered by a cover plate made of unhardened and galvanized steel. One or two cover plates can be used depending on requirements. Thus there is a gap between the inner ring and the cover plate, the cover does not cause any additional frictional torque. This seal type is designated “Z” for one cover plate or “ZZ” for two.
RS-Seal
The sealing is provided by a steel-sheet reinforced rubber seal that is fixed to the outer ring and rubs against the inner ring. This seal can be mounted on one or both sides and provides a high sealing effect, thus ensuring the reliability of the deep groove ball bearing. This type can be used at an operating temperature between approximately -20°C and +100°C and is designated “RS” (one sealing disc) or “2RS” (two sealing discs).
RZ-Seal
This seal type is similar to the “RS seal,” differing only in that the RZ seal is a low-friction variant. As with the “ZZ variant,” there is a non-contact sealing gap between the inner ring and the cover plate. The design and temperature resistance characteristics correspond to those of an “RS seal.” The RZ seal can also be assembled on one or both sides and is designated “RZ” or “2RZ” for this purpose.
The bearing clearance in ball bearings is defined by the designations C2, C0/CN, C3, C4, and C5 and is classified according to the bore size. C0/CN represents the standard bearing clearance, although a different bearing clearance can also be agreed upon. The bearing clearance is lower for class C2 and correspondingly higher for classes C3 – C5.
|
Nominal Ø of Bore
in mm |
C2 in µm |
C0 / CN in µm |
C3 in µm |
C4 in µm |
C5 in µm |
|---|---|---|---|---|---|
|
>
≤
|
min
max
|
min
max
|
min
max
|
min
max
|
min
max
|
|
3
10
|
0
7
|
2
13
|
8
23
|
14
29
|
20
37
|
|
10
18
|
0
9
|
3
18
|
11
25
|
18
33
|
25
45
|
|
18
24
|
0
10
|
5
20
|
13
28
|
20
36
|
28
48
|
|
24
30
|
1
11
|
5
20
|
13
28
|
23
41
|
30
53
|
|
40
45
|
1
11
|
6
23
|
18
36
|
30
51
|
45
73
|
The tolerance class describes the precision of various tolerances, such as outer diameter, bore, and width.
We offer our deep groove ball bearings in the tolerance classes P0/N0 (ABEC-1) / P6 (ABEC-3) / P5 (ABEC-5). Our standard version corresponds to class P0/PN. Special tolerances are also available and are individually adapted to the specific application and installation situation.
Depending on the type, bearing series and application, different types of cages made of sheet steel, brass or plastic are used in deep groove ball bearings:
Clinch cage
Clinch cages made of brass or sheet steel are used for bearings made of rolling bearing steel. For stainless steel bearings, they are made of stainless steel sheet. Clinch cages consist of two parts that are clamped together during assembly using forming tools. Due to their small size, clinch cages are often used for miniature deep groove ball bearings.
Rivet cage
Like clinch cages, steel rivet cages consist of two parts and are available in the same materials as clinch cages. The two halves are then riveted together during the assembly process and creating a highly durable connection. Steel rivet cages are preferably used for larger series.
Snap cage made of steel
Steel snap cages are typically used for bearings with a bore diameter of less than 4 mm or for very thin-walled designs due to the limited installation space. The cage snaps over the ball during assembly. Depending on the bearing material, the cages are made of sheet steel or stainless steel.
Snap cage made of plastic
Plastic snap cages are primarily manufactured from thermoplastics, such as polyamide by injection molding prcess. Their assembly and operating principle are the same as those of steel snap cages. Plastic cages are characterized by good running and sliding characteristics, as well as high toughness. Polyamide cages can be used at operating temperatures ranging from approximately -30°C to +100°C. Higher operating temperatures of up to +130°C can be achieved when using glass-fiber-reinforced thermoplastics.
To reduce friction, prevent corrosion, and achieve optimal lifetime, we use a wide range of high-performance lubricants for the efficient use of our bearings. We are quite flexible in this respect and can respond to distinct applications such as smooth running, food safety, resistance to temperature, water or steam, and many others. Basically, our lubricants are characterized by good wear and corrosion protection, thermal stability as well as high compatibility with regard to a vast variety of materials.
Greases
Greases have the advantage of being very consistent and thus adhere well to the contact surfaces of the rolling elements. Grease can also be used to seal the bearings against contamination or moisture. Under normal operating conditions, our ball bearings are lubricated with grease. Special greases can also be used for the most demanding applications. We use specially selected high-performance greases from renowned manufacturers such as Shell, Esso, Klüber, and Fuchs. If extreme operating conditions are required, we can consult the manufacturer’s specialists for additional support.
Oils
A significant part of the benefits of our greases are retained in oil. Added to this is their excellent creep and wetting properties. Here, too, we offer a wide range of characteristics and viscosities. Our lubricating oils are used for special requirements in ball bearings. Here, too, we rely on products from renowned manufacturers such as Klüber, Esso, Mobil, Optimol, Castrol, and many others. The use of external support is a matter of course, if necessary.
The running noise is a measurable indicator of a ball bearing’s quality. As lower the noise, as better the quality is. Typically, three frequency ranges (high, low, and medium frequencies) are measured by using a structure-borne noise sensor (V classes). For this purpose, the bearing rings are loaded with a defined measuring force, the bearings are accelerated, and the value is then determined in µm/s.
Further qualification using a similar test procedure can be performed in decibels (Z classes).
Defective raceways, contaminants, or defective balls can be sorted out or classified by using both test methods. These additional, cost-relevant testing processes are generally only necessary for very high-speed applications – such as electric motors.
Your advantages with deep-groove ball bearings from SKT
Experience and use of in-house production
The experience of our in-house production gives us advantages that differentiate us from our competitors and represent significant benefits for our customers.
Maximum transparency throught a defined supply chain
Every work step is traceable and controllable – for predictable processes, reliable delivery dates, and minimal risks.
Supply security throught a strong network
Long-standing supplier relationships ensure consistently high quality and delivery capability – even in times of supply bottlenecks or the need of special requirements.
Ready for a precise solution?
Contact us now
Learn more about our deep-groove ball bearings and how they can optimize your industrial processes. Let’s work together to find the perfect solution for your requirements.
Areas of application for deep-groove ball bearings
As one of the most widely used and versatile bearing types, our deep groove ball bearings are used in numerous applications.
- Machine and Plant engineering
- Engine technology
- Drive technology
- Automation
- Medical technology
- Food industry
- Building industry
- Materials handling and logistics
- Various industrial applications
