What are the characteristics of cam roller bearings?

The diameter of cam roller bearings rod ends varies from a minimum of 3 mm to a maximum of 30 mm. It has a wide range of sizes. It includes cage, full roll, shielded type, sealed type, spherical outer ring, cylindrical outer ring, etc.
The rollers are guided by a cam follower bearing with a cage and a full-roller cam follower bearing. Cam roller bearings with cage are suitable for parts with low friction coefficient and high speed. Full roller bearings are suitable for low-speed, heavy-duty parts. The structure of the seal is provided with a shielding cam follower bearing and a sealed cam follower bearing.

The outer ring of the shield bearing is very small between the ring of the rod end shaft and the outer ring and the side plate, forming a labyrinth. Sealed bearings are equipped with gaskets in the shielding labyrinth to prevent foreign matter from intruding.
The outer diameter of cam roller bearings has a spherical surface and a cylindrical surface. Spherical outer ring bearings can reduce uneven load caused by installation errors. The cylindrical outer ring bearing has a large contact area with the relative sliding surface, which is suitable for sliding surfaces with large loads or low hardness.

Cam roller bearings are a component in a piston engine. Its function is to control the opening and closing of the valve.
Although the speed of the camshaft in a four-stroke engine is half that of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as the crankshaft), but usually its speed is still very high and it needs to withstand a lot of torque. Camshafts have high requirements in terms of strength and support, and their material is generally special cast iron, and occasionally forgings are also used.
Since the valve motion law is related to the power and operating characteristics of an engine, the camshaft design occupies a very important position in the engine design process.

Structural characteristics of cam roller bearings
1. Combined structure of thick outer ring needle roller bearing and bolt
2. There are metric series and imperial series in size
3. There are lubricating oil channels in the bolts of cam roller bearings
4. In order to facilitate the installation, the large end of cam roller bearings is designed with "one-character" and "hexagonal hole type" wrench assembly methods
5. The outer surface of the outer ring has cylindrical and spherical shapes, which can be selected according to the actual application.
6. Full-roller cam roller bearings are suitable for large loads and low speed occasions
7. Eccentric cam roller bearings can easily and accurately adjust the axis position of the bolt during installation.

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