Combined Needle Roller Bearings
AMIGO Combined needle roller bearings consist of a radial needle roller bearing integrated with a thrust bearing, capable of handling both radial and axial loads. They are ideal for situations where other locating bearings are too bulky, or where heavy axial loads, high speeds, or insufficient lubrication for simple thrust washers are concerns.
- Locating bearing arrangement
Accommodate combined radial and axial loads in one or both directions. - Low cross section
In applications where less space is available, combined needle roller bearings offer a very compact solution. - High carrying capacity
Owing to their large number of rolling elements, combined needle roller bearings have a high load carrying capacity.
AMIGO Combined needle roller bearings with machined rings are widely used in various industries. Their availability matches their versatility across numerous applications in a wide range of designs, variants, and sizes. Examples of applications include:
- Automotive Industry
- Aerospace Industry
- Heavy Machinery
- Industrial Machinery
- Textile Machinery
- Railway Industry
Combined Needle Roller Bearings - Designs and Variants
Needle Roller / Angular Contact Ball Bearings
These bearings combine a needle roller with an angular contact ball bearing, which provides support for both radial and axial loads. This dual-function design is ideal for applications that require a compact, high-speed bearing with good load-carrying capacity in both directions.
Needle Roller / Thrust Ball Bearings
Needle roller and thrust ball bearings are designed to handle both axial and radial loads. The needle rollers accommodate radial loads, while the thrust ball bearing manages axial loads. This makes them suitable for applications that need precise load distribution in compact spaces.
Needle Roller / Cylindrical Roller Thrust Bearings
This bearing configuration combines a needle roller bearing for radial load support with a cylindrical roller thrust bearing for managing axial loads. It offers high load capacity, making it suitable for applications where space is limited, but high performance is required.
Combined Needle Roller Bearings Size Chart
| Designation | d [mm] | D [mm] | B [mm] | C [mm] |
|---|---|---|---|---|
| NKA 5901 | 12 | 24 | 10 | 10 |
| NKB 5901 | 12 | 24 | 17.5 | 10 |
| NKA 5902 | 15 | 28 | 20 | 15 |
| NKA 5903 | 17 | 30 | 20 | 18 |
| NKB 5903 | 17 | 30 | 28 | 18 |
| NKA 5904 | 20 | 37 | 23 | 23 |
| NKA 59/22 | 22 | 39 | 23 | 23 |
| NKB 59/22 | 22 | 39 | 23 | 23 |
| NKA 5905 | 25 | 42 | 23 | 23 |
| NKA 5906 | 30 | 47 | 23 | 25 |
| NKB 5906 | 30 | 47 | 30 | 25 |
| NKA 5907 | 35 | 55 | 30 | 27 |
| NKA 5908 | 40 | 62 | 30 | 30 |
| NKB 5908 | 40 | 62 | 34 | 30 |
| NKA 5909 | 45 | 68 | 34 | 30 |
| NKB 5909 | 45 | 68 | 40 | 30 |
| NKA 5910 | 50 | 72 | 30 | 30 |
| NKB 5910 | 50 | 72 | 34 | 30 |
| NKA 5911 | 55 | 80 | 34 | 34 |
| NKB 5911 | 55 | 80 | 40 | 34 |
| NKA 5912 | 60 | 85 | 34 | 34 |
| NKB 5912 | 60 | 85 | 42 | 34 |
| NKA 5913 | 65 | 90 | 34 | 40 |
| NKB 5913 | 65 | 90 | 42 | 40 |
| NKA 5914 | 70 | 100 | 40 | 40 |
Recommended Reading
Frequently Asked Questions (FAQs)
Q: How do combined needle roller bearings work?
A: These bearings manage both radial loads through needle rollers and axial loads via integrated thrust ball or roller elements, allowing for versatile load management in space-constrained applications.
Q: What types of combined needle roller bearings exist?
A: The main types include needle roller/axial ball bearings, needle roller/axial cylindrical roller bearings, and needle roller/angular contact ball bearings, each suited to different load requirements.
Q: What industries use combined needle roller bearings?
A: These bearings are used in industries such as automotive manufacturing, construction machinery, material handling equipment, and agricultural machinery.
Q: What are the advantages of using combined needle roller bearings?
A: Their compact design saves space, while offering high load-carrying capacities for both radial and axial loads, making them ideal for applications with tight dimensional constraints.
Q: How should combined needle roller bearings be lubricated?
A: Depending on the application, they can be lubricated with oil or grease. Proper lubrication helps in reducing wear and maintaining performance under high load conditions.
Q: What are the limitations of combined needle roller bearings?
A: These bearings might have speed limitations due to their dual-load nature, and improper installation or lubrication can lead to premature wear.
Q: What is the typical load capacity of combined needle roller bearings?
A: Load capacities vary based on bearing size and configuration but typically offer high radial load capacities due to the needle rollers and moderate axial load capacities.
Q: Can combined needle roller bearings be used in high-speed applications?
A: While they perform well under load, these bearings are generally not suited for extremely high-speed applications due to the combined nature of the load management.
Q: How are combined needle roller bearings installed?
A: Installation requires precise alignment of both radial and axial components, ensuring that the bearing operates efficiently and provides proper load distribution.