What is the size of the bearing for the caster wheels?

The bearing size of casters varies depending on their application scenarios, load-bearing requirements, and the size of the casters themselves, so there is no unified size standard. Here are some common types of caster bearings and their possible sizes:

1、 Common types and sizes of bearings

6200 series bearings

6200 bearing: a type of deep groove ball bearing with small specifications, suitable for small and medium-sized casters.

6202 Bearing: A double ball bearing with an inner diameter of 15mm, an outer diameter of 35mm, and a width of 11mm. Suitable for heavy-duty casters.

6203 bearing: The size specification is larger than 6202, with an inner diameter of 17mm, an outer diameter of 40mm, and a width of 12mm. Suitable for large-sized casters.

6204 bearing: inner diameter 20mm, outer diameter 47mm, thickness 14mm. Suitable for heavy equipment such as scaffolding with wheel diameters below 150mm.

6205 bearings: used for extra heavy casters, specific dimensions may vary depending on brand and manufacturing standards.

Other types of bearings

6304 type bearing: inner diameter 20mm, outer diameter 52mm, thickness 15mm. Suitable for scaffolding with wheel diameters below 200mm.

30204 type bearing: inner diameter 20mm, outer diameter 47mm, thickness 15.25mm. Suitable for scaffolding with wheels with a diameter of 150mm or more.

Flat bearings: suitable for high and extremely high loads and high speeds, commonly used in heavy machinery.

Roller bearings: capable of bearing heavy loads, with average rotational flexibility.

Terling bearings: made of special engineering plastics, suitable for damp and corrosive places.

Ball bearings: Made of high-quality bearing steel, they can make the wheels more stable.

Cone bearing: It is one of the important components of roller bearings, which can provide improved movement characteristics.

2、 Considerations for choosing bearings

Wheel size: The size of the wheels directly affects the size of the required bearings. Generally speaking, the larger the caster, the larger the required bearing size.

Load bearing requirements: Different application scenarios have different load bearing requirements for casters. Therefore, when choosing bearings, it is necessary to consider the size of the load that the casters need to bear.

Rotational flexibility: Depending on the requirements of the application scenario, sometimes it is necessary to choose bearings with higher rotational flexibility, and sometimes it is necessary to choose bearings with stronger load-bearing capacity.

Environmental factors: If the casters will be used in humid or corrosive environments, it may be necessary to choose bearings with special materials, such as Terling bearings.

In summary, the bearing size of casters varies due to various factors. When choosing bearings, it is necessary to consider the specific size, load-bearing requirements, and application scenarios of the casters comprehensively.