The difference between the 231 and 230 series lies in width and load-carrying capacity: the 231 series is wider and has a significantly higher radial load capacity than the 230 series with the same bore diameter, making it more suitable for heavy-load or higher shock-load condition. Both series offer self-aligning capability, but their applications differ in focus.

Width and Load Capacity

The most intuitive differences are reflected in dimension and load parameter. Taking Schaeffler products with the same bore diameter (180 mm) as an example:

The 231 series is wider and heavier, with noticeably higher load capacity. The 230 series, with its narrower cross-section, has an advantage in applications where radial space is limited.

Application

230 Series: Heavy Loads in Compact Space
Suitable for equipment with limited installation space that still needs to carry relatively heavy radial load. Typical applications include:

Mining crusher, cement kiln support roller

Heavy-duty belt conveyor, metallurgical roller table

Large industrial fan, paper drying machine

231 Series: Enhanced Load Capacity for Demanding Condition
Due to its higher load capacity, the 231 series is more commonly used in heavy-duty equipment with more severe shock and vibration. Typical application include:

Cement vertical mill, mining crusher, steel rolling mill

Large fan, port conveying machinery

Heavy-duty gear reducer, vibrating screen, etc.

Selection Recommendation

The key to selection is balancing space constraint and load requirement: if radial installation space is limited and the load is within the capacity of the 230 series, the 230 series should be preferred; if the working condition involve high shock and higher load-carrying requirement, and space permits, the 231 series is the more reliable choice.