What are the differences between the suffixes EC3 and EW33 J C3 of spherical roller bearings?

Nov 14, 2024

The differences between the suffixes EC3 and EW33 J C3 of spherical roller bearings are mainly reflected in the design features, functions and applicable scenarios of the bearings. The following is a detailed analysis:

1. EC3 suffix.

Design features:

EC3 indicates that the internal clearance of the bearing is greater than the ordinary grade; that is, it has a larger radial internal clearance.

Function:

The larger clearance helps the bearing to better adapt to the thermal expansion of the shaft or housing during operation, as well as the deviation caused by misalignment.

It can also improve the running smoothness of the spherical roller bearing and reduce friction and wear.

Applicable scenarios:

It is suitable for occasions where a larger clearance is required to accommodate thermal expansion or misalignment, such as machinery or heavy-loaded equipment with large temperature changes.

2. EW33 J C3 suffix

Design features:

EW33: Indicates that the outer ring of the bearing has oil grooves and oil holes. This design helps to provide additional lubrication during the operation of the bearing, thereby prolonging the service life of the bearing and reducing friction.

J: Indicates that the bearing chooses a stamped steel cage structure. The stamped steel cage has high strength and good wear resistance, suitable for various heavy-duty and high-speed applications.

C3: It also indicates that the internal clearance of the bearing is larger than the normal grade, similar to the EC3 suffix, with a larger radial internal clearance.

Function:

The additional lubrication function can improve the lubrication effect of the bearing, reduce friction and wear, and extend the service life.

The stamped steel cage provides good strength and wear resistance, suitable for heavy-duty and high-speed applications.

The larger clearance helps to accommodate thermal expansion and misalignment of the shaft or housing.

Applicable scenarios:

Suitable for occasions that require additional lubrication and heavy-duty applications, such as mines, heavy machinery, etc.

It is also suitable for occasions that require higher running smoothness and longer service life.

Summary

Clearance difference: Both bearings have a C3 suffix, indicating that their internal clearance is larger than the normal grade. However, this clearance difference may be insignificant in actual applications, depending on the overall design of the bearing and the application environment.

Lubrication and cage: The bearing suffix EW33 J C3 has additional lubrication and a stamped steel cage, which enables it to have better performance in heavy-duty and high-speed applications. The bearing suffix EC3 does not have these additional functions.

Therefore, when selecting a spherical roller bearing model, the appropriate bearing suffix should be selected according to the specific application environment and requirements. If additional lubrication function and heavy load performance are required, a bearing with the suffix EW33 J C3 can be selected; if the main concern is clearance and running smoothness, a bearing with the suffix EC3 can be selected.