What is caster? How many type of caster? which bearing suitable for caster

1.What Is Caster？

Casters are a general term, including movable casters and fixed casters. Movable casters are also what we call universal wheels. Its structure allows 360-degree rotation; fixed casters are also called directional casters, which have no rotating structure and cannot be rotated. Usually two types of casters are used in combination. For example, the structure of a trolley has two directional wheels at the front, and two universal wheels at the back, which are close to the push armrest.

2.Type of caster

The fixed casters have no rotating structure and cannot rotate. Usually two types of casters are used in combination. For example, the structure of a trolley has two fixed wheels at the front, and two universal wheels at the rear, which are close to the push armrest. There are casters made of various materials, such as cast iron wheels, nylon wheels, etc.

3.Bearing For Caster

There many bearing suitable for caster. when the hardness and the quality enough for the purpose. which can use for the bearing of caster 

There usual model: 

608 deep groove ball bearing 

6000zz 2RS

60001 zz /2RS

6202 2RS/ZZ