NSK FR 4B ZZ deep groove ball bearing

NSK FR 4B ZZ belongs to deep groove ball bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for FR 4B ZZ and any equivalents.

The NSK FR 4B ZZ is a deep groove ball bearing that incorporates a mounting flange on its outer ring. This design allows the bearing to be secured directly to sheet metal or a housing, saving axial space. The code FR 4B ZZ breaks down as follows: FR denotes the flanged series, 4B specifies the size and flange variant, and ZZ indicates double metal shields. This bearing is commonly used in applications that demand low rotational torque and protection from dust.

Understanding the code helps you specify the right part. The FR prefix identifies a deep groove ball bearing with an outer flange for direct mounting. The number and letter, such as 4B, define the size and flange style. Suffixes like ZZ mean two metal shields that block dust without causing significant drag. Other suffixes, such as 2RS, would indicate rubber seals for better sealing. With this logic, you can interpret any bearing in the series and order a correct replacement.

These flanged bearings are found in fans, extractors, small motors, circulation pumps, refrigeration units, and office equipment. They also appear in household appliances and light transmission mechanisms where a flange eliminates the need for a machined housing. Their capacity to handle moderate radial and axial loads makes them suitable for low and medium power rotating equipment.

When selecting a bearing, consider the sealing type. ZZ works well in dusty conditions and needs minimal lubrication, while 2RS provides improved grease retention and water resistance. The flange must match the housing diameter and hole pattern. During installation, avoid striking the seals and verify alignment to prevent edge loading. Factory lubrication typically lasts for the life of the bearing in normal use; for harsh environments, choose the rubber-sealed variant.

If you are replacing a bearing from another manufacturer, the FR series often has equivalents in brands like SKF, FAG, or NTN, as they usually share key dimensions. Interchangeability depends on matching the bore diameter, flange outer diameter, and overall width. Send us the complete original code and we will identify the equivalent NSK reference. We can also quote based on the dimensions from your drawing or sample.

To request a quote for an NSK FR series bearing, message us on WhatsApp with the full code, such as FR 4B ZZ, or provide the flange dimensions and bore diameter. Our team responds promptly with the available reference and compatible options. We can also help you choose the most suitable sealing for your operating conditions. Send your inquiry and we will assist you.