Thrust Bearings: A Guide from Understanding to Selection

ISK Bearings - Thrust Bearings Complete Guide

Table of Contents

1. What are Thrust Bearings

2. Where are Thrust Bearings Used

3. What Types of Thrust Bearings Exist

4. Structure and Function of Thrust Bearings

5. How Should I Select Thrust Bearings

6. Thrust Bearings Size Chart

7. Miniature Thrust Bearings: Compact Bearing Solutions

 

1. What are Thrust Bearings

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2. Where are Thrust Bearings Used

Thrust bearings are mainly divided into two major categories: Thrust Ball Bearings (Thrust Ball Bearings) and Thrust Needle Bearings (Thrust Roller Bearings), which are designed to withstand axial or thrust loads.

 

 

1. Ball Thrust Bearings

2. Roller Thrust Bearings

 

Thrust Bearing Type Comparison Table ▼

Characteristics	Thrust Ball Bearings	Thrust Needle Bearings
Rolling Elements	Spherical balls	Cylindrical rollers
Load Distribution	Smaller ball size makes load concentration easier	Capable of distributing larger axial loads, providing larger contact area
Load Capacity	Smaller	Larger
Friction	Usually smaller	Usually larger
Application Scenarios	Axial loads, high-speed scenarios	Axial loads, space-constrained scenarios
Speed	Usually higher	Usually lower

 

Thrust ball bearings and thrust needle bearings are common types of thrust bearings. Selection of appropriate bearings should be based on load magnitude, speed requirements, space limitations, and structural complexity factors.

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4. Structure and Function of Thrust Bearings

1. Basic Structure of Thrust Bearings

Thrust bearing structure typically consists of one or more axial balls or rollers positioned within a dedicated bearing seat. This design not only withstands high axial loads but also maintains low friction. Additionally, thrust bearing balls or rollers are usually equipped with a retainer to ensure proper positioning.

2. Structure and Function of Thrust Needle Bearings

Thrust Needle Bearings (Thrust roller bearing) is a specialized type of bearing primarily used to withstand axial loads and effectively transmit and support axial forces between the shaft and bearing housing. It typically consists of one or more needle rollers (needle-shaped rollers) and one or more retainers.

In summary, thrust needle bearings (Thrust roller bearing) are a specialized type of bearing designed for bearing axial loads. Their structure is compact and can provide efficient axial support within limited space.

 

It is worth noting that thrust needle bearings primarily handle axial loads, and their capacity for bearing radial loads is relatively lower. If simultaneous bearing of radial loads and axial loads is required, it may be necessary to use other types of bearings or combine different types of bearings to achieve the required support.

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5. How Should I Select Thrust Bearings

Selecting the appropriate thrust bearing is a critical step in ensuring smooth machinery operation.

 

The following are some important factors to consider when selecting the appropriate thrust bearing:

• Load Type and Magnitude: You need to determine the type and magnitude of loads in your application to ensure that the selected bearings can effectively withstand these loads.
• Operating Speed: If your application requires high-speed operation, thrust ball bearings may be a better choice. For larger loads, you may need to consider using cylindrical roller thrust bearings.
• Installation Space: Consider the available installation space in your mechanical equipment to determine the appropriate thrust bearing size.

 

Furthermore, you should also consider the manufacturer's reputation and product quality to ensure that the thrust bearings you purchase have excellent durability and reliability. By carefully considering these factors, you can find the thrust bearing best suited to your application, thereby ensuring smooth and reliable operation of your equipment.

 

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6. Thrust Bearings Size Chart

1. Thrust Ball Bearings Size Chart

Bearing No. (Flat type)	Bore(d)(mm)	Outer(D)(mm)	T(mm)
F4-9M	4	9	4
F4-10M	4	10	4
F5-10M	5	10	4
F5-11M	5	11	4.5
F5-12M	5	12	4.5
F6-12M	6	12	4.5
F6-14M	6	14	5
F7-13M	7	13	4.5
F7-15M	7	15	5.5
F7-17M	7	17	6
F8-16M	8	16	5
F8-19M	8	19	7
F8-22M	8	22	7
F9-17M	9	17	5
F9-19M	9	19	6.5

 

Bearing No. (Flat type)	Bore(d)(mm)	Outer(D)(mm)	T(mm)	r(mm)
F9-20M	9	20	7	-
F10-18M	10	18	5.5	-
51100	10	24	9	0.5
51200	10	26	11	1
F12-23M	12	23	7.5	-
51101	12	26	9	0.5
51201	12	28	11	1
51102	15	28	9	0.5
51202	15	32	12	1
51103	17	30	9	0.5
51203	17	35	12	1
51104	20	35	10	0.5
51204	20	40	14	1
51105	25	42	11	1
51205	25	47	15	1

 

 Complete Thrust Ball Bearings Catalog

 

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2. Thrust Needle Bearings Size Chart

Thrust Needle Bearings Specifications
Bearing No.	Bearing No. (Thrust bearings plate)	Bearing No. (Bearings plate)	Dc1(mm)	Dc(mm)	DW(mm)
AXK 0414TN	AS 0414	-	4	14	2
AXK 0515TN	AS 0515	-	5	15	2
AXK 0619TN	AS 0619	LS 0619	6	19	2
AXK 0821TN	AS 0821	LS 0821	8	21	2
AXK 1024	AS 1024	LS 1024	10	24	2
AXK 1226	AS 1226	LS 1226	12	26	2
AXK 1528	AS 1528	LS 1528	15	28	2
AXK 1730	AS 1730	LS 1730	17	30	2
AXK 2035	AS 2035	LS 2035	20	35	2
AXK 2542	AS 2542	LS 2542	25	42	2
AXK 3047	AS 3047	LS 3047	30	47	2
AXK 3552	AS 3552	LS 3552	35	52	2
AXK 4060	AS 4060	LS 4060	40	60	3
AXK 4565	AS 4565	LS 4565	45	65	3
AXK 5070	AS 5070	LS 5070	50	70	3

 

 

Thrust bearings play an important role in various mechanical applications, and selecting the appropriate thrust bearing is crucial for ensuring stable operation of the equipment. By understanding the basics of thrust bearings and consulting relevant product catalogs, you can better select products that meet your needs and ensure equipment performance and reliability.

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7. Miniature Thrust Bearings: Compact Bearing Solutions

Miniature thrust bearings are an extremely small bearing type specifically designed to support and withstand axial loads.

These bearings are primarily used in miniature mechanical fields, including precision instruments, small electronic devices, and model manufacturing, to provide reliable axial support.

 

7.1 Advantages of Miniature Thrust Bearings

• Compact Size: Miniature thrust bearings are extremely small, suitable for precision equipment with limited installation space.
• High Axial Load Capacity: Despite their tiny volume, these bearings can effectively withstand light to medium axial loads, providing stable axial operation.
• Precision Performance: Miniature thrust bearings feature precise design, providing highly accurate axial support suitable for equipment requiring high motion control precision.
• Lightweight: Their compact size and lightweight structure make miniature thrust bearings suitable for industries requiring lightweight design, helping to reduce overall system weight.

7.2 Miniature Thrust Bearings Size Chart

Key Summary

Thrust bearings are a precision transmission component. By understanding the working principles, types, structure and function, and application scenarios of thrust bearings, you can select appropriate thrust bearing products more scientifically. In the selection process, you should focus on considering load type, operating speed, and installation space factors, and choose ball or needle types according to application requirements.

 

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