Что такое стопорное кольцо и как измерить стопорное кольцо?

The стопорное кольцо is an important component in the mechanical structure and plays an important role. Although the snap ring is small, it is an important component that cannot be ignored. Whether it is in limiting, positioning, shock absorption, or saving assembly space, the snap ring plays a stable and efficient role. Understanding the types, measurement methods, usage skills, and correct disassembly and assembly methods of the snap ring is of great significance for mechanical maintenance, parts replacement, and precision assembly. If you don’t know much about the snap ring, this article will help you understand it in depth.

Что такое стопорное кольцо?

A snap ring, also known as a snap ring, a snap ring, or a circlip, is a fastening element used on shaft or hole parts to prevent parts from moving or falling out in the axial direction. It is usually assembled in a shaft groove or a hole groove, and uses elasticity or clamping force to achieve the limit fixing function.

snap rings are widely used in machinery, automobiles, aviation, home appliances, tools and other fields, and are indispensable precision parts in many equipment. Common materials include spring steel, carbon steel, stainless steel and brass, and the surface can be oxidized, electroplated, blackened, rust-proofed, etc.

How to measure snap rings?

Accurately measuring snap rings is the prerequisite for correct selection and replacement. The measurement content includes outer diameter, inner diameter, thickness, groove width and groove depth:

Measuring tools usually use calipers or micrometers to ensure that the measurement is carried out in an undeformed state to obtain accurate values. If it is a standard part, you can check the table according to ISO/DIN/JIS and other models.

Types of snap rings

snap rings can be divided into many types according to the installation position, shape and purpose:

1. snap rings for shafts (external snap rings): installed on the shaft groove to prevent the parts from moving outward along the axial direction
2. snap rings for holes (internal snap rings): installed in the hole groove to prevent bearings and other parts from sliding inward
3. E-type snap rings: similar to the “E” shape, easy to install and disassemble quickly, used for small bearings and motors
4. Spiral snap rings: spirally wound, suitable for high-speed rotating systems
5. Wave snap rings: with buffering and elastic characteristics, suitable for parts with limited preload space
6. Constant pressure snap rings: self-adjusting force control, used in temperature difference or force change occasions
7. Holeless snap rings (closed type): no installation holes, special methods are required for disassembly and assembly, suitable for closed structures or micro components

Detailed pictures of differentsnap rings

What are snap rings used for?

The main function of snap rings is to limit the axial movement or positioning of parts, and its uses are very wide:

1. Mechanical structure limit: prevent bearings, gears, and wheels from slipping out or shifting during movement;
2. Transmission mechanism protection: maintain the coaxiality of the shaft system to avoid transmission failure due to loosening;
3. Tool component positioning: such as electric tool chucks and lithium battery slot positioning;
4. Elastic preload function: such as wave snap rings are used for buffering and shock absorption;
5. Compact assembly design: snap rings replace nuts/washers to save installation space.

Как использовать стопорные кольца?

When using snap rings, pay attention to the following points:

1. Confirm the size and model: snap rings that match the shaft or hole groove must be selected;
2. Choose the right материал: For high-speed environments, it is recommended to use stainless steel or alloy steel snap rings;
3. Pay attention to directionality: Some snap rings are designed with specific directions (such as single-sided fillets) and must be installed correctly;
4. Use special tools: Especially for snap rings with mounting holes, circlip pliers should be used to avoid damage.

Как установить стопорные кольца?

Step 1: Identify the snap rings Type

Определите, с каким стопорным кольцом вы работаете - внутренним или внешним. Это очень важно, так как от этого будет зависеть ваш подход к процессу установки.

Шаг 2: Обеспечьте безопасность

Наденьте защитные очки и перчатки, чтобы защитить глаза и руки. Безопасность всегда должна быть на первом месте.

Шаг 3: Очистите компоненты

Очистите вал, отверстие и стопорное кольцо, чтобы удалить грязь, мусор или старую смазку. Чистая поверхность имеет решающее значение для правильной установки.

Step 4: Select the Appropriate snap rings

Выберите правильный размер стопорного кольца, исходя из ваших размеров и условий применения. Убедитесь, что оно плотно прилегает к отверстию или валу.

Step 5: Position the snap ring Pliers

Вставьте кончики плоскогубцев в зазоры на стопорном кольце. Убедитесь, что плоскогубцы правильно сориентированы: для внутренних или внешних стопорных колец.

Стопорное кольцо из проволоки

Шаг 6: Сожмите стопорное кольцо

Gently squeeze the pliers to compress the snap-wire ring. This will reduce its diameter, making it easier to insert into the bore or onto the shaft.

Шаг 7: Вставьте стопорное кольцо

Сжав стопорное кольцо, осторожно вставьте его в отверстие или на вал. Убедитесь, что оно сидит правильно и надежно.

Шаг 8: Освободите щипцы

Slowly release the pliers, allowing the snap wire ring to expand and lock into place. Listen for a satisfying “snap” sound, indicating that the snap ring is fully engaged.

Шаг 9: Проверка установки

Double-check that the snap wire ring is correctly installed and secured. Give it a gentle tug to ensure it doesn’t come loose.

Шаг 10: Смажьте (при необходимости)

В зависимости от условий применения может потребоваться смазка для более плавной работы проволочного кольца. Используйте смазку, совместимую с конкретной средой и материалами.

How to remove the snap ring?

Standard snap rings (with holes) can be removed in the following ways:

Use circlip pliers to insert into the snap ring hole;

Slowly open or press (depending on the installation type);

Remove the snap ring from the groove;

Be careful not to scratch the groove or surrounding parts.

It is recommended to use a dry cloth to clean impurities on the snap ring before removal to prevent it from getting stuck.

How to remove a snap ring without a hole?

Holeless snap rings (such as E-type and closed rings) usually cannot be directly removed with circlip pliers. The following techniques can be used:

1. Precision screwdriver prying: Insert a small flat-blade screwdriver into the gap between the snap ring and the groove;
2. Diagonal pliers assisted extraction: When part of the snap ring is pried up, use diagonal pliers to clamp it out;
3. Use a disassembly needle or extractor: For micro structures, special micro disassembly tools can be used;
4. Heating method (only for metal parts): Slightly heat the snap ring to expand, which helps to loosen it.

Note: The risk of disassembling holeless snap rings is high, and care should be taken to avoid popping out and injuring people or damaging surrounding parts.

Заключение

At present, the application field of the snap ring has become very wide, and it also plays an important role. Therefore, when purchasing or using the snap ring, you must learn more and refer to it. It is recommended to choose standardized, high-strength, and highly adaptable продукты, and use special tools and correct methods for installation and disassembly to ensure safety and efficiency. If you have further requirements for the selection of snap rings, drawing design, or industrial applications, you can also refer to DIN 471, DIN 472, GB/T 893 and other standards for in-depth matching.