NSK FR 4B deep groove ball bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Deep groove ball bearings
- Series
- FR
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Description
NSK FR 4B 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 and any equivalents.
The NSK FR series features deep groove ball bearings with a flanged outer ring, which simplifies axial positioning in compact assemblies. These bearings suit small motors, fans, pumps, power tools, and light transmission systems where space is limited and the flange replaces separate locating components.
Part numbers like FR 4B and FR 168B follow a clear pattern: FR indicates the flanged deep groove ball bearing family, the number denotes the size, and the B suffix identifies a specific execution variant, often related to closure type or outer ring profile. When requesting a quote, provide the complete designation as shown on the bearing or drawing.
Typical applications include small electric motors, centrifugal and axial fans, low-power water pumps, portable tools, office equipment, and light automation. The flanged outer ring rests against a machined face and is secured with screws or a shoulder, eliminating the need for additional covers or lock nuts.
For proper installation, verify the housing bore and flange seating surface. The flange must sit flat against its mating face; misalignment or uneven seating can cause parasitic axial loads. Check internal clearance and alignment between supports. Lubrication with grease or oil depends on the application, and sealed variants are available for dusty or wet environments. Use a press or puller for mounting—never strike the flange.
When cross-referencing an existing bearing from another brand, compare bore diameter, outer diameter, width, flange diameter and position, and closure type. With these dimensions, the MR team can suggest a compatible NSK alternative. If the part number is unknown, send measurements and a photo via WhatsApp or email.
To request a quote, contact MR Industrial Accessories LLC via WhatsApp or email with the complete part number, such as FR 4B or FR 168B, or with the housing dimensions. The team responds promptly and can help select the right variant for your application.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does the B suffix mean in NSK FR bearings?
- The B suffix indicates an execution variant within the same size, often related to closure type or outer ring contour. To confirm the exact specification, send the complete part number to MR for a detailed quote.
- How do I replace an FR bearing from another brand?
- Compare bore diameter, outer diameter, width, flange diameter and position, and closure type. With these dimensions, MR can recommend a compatible NSK alternative. If you lack the part number, provide measurements and a photo via WhatsApp or email.
- What equipment uses flanged deep groove ball bearings?
- They are common in compact equipment where the flange handles axial location: small motors, fans, light pumps, power tools, and automation mechanisms. The flange simplifies housing design and reduces the number of fastening parts.