NJ321

Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agree
$613.00 USD
$613.00 USD
Sale Sold out
Bore105 mm 4.1339 in
Outside dia.225 mm 8.8583 in
Width49 mm 1.9291 in
TypeCylindrical roller bearing
SealingOpen
ClearanceNormal
Ships separately from our European warehouse — shipping from $79, quoted at checkout
Ships from our European partner stock — allow 5–8 business days
  • NJ321 — illustration
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Image is for illustration purposes only.

What NJ321 means

CodePositionMeaning
NJ Type Cylindrical roller bearing, type NJ: two flanges on the outer ring, one on the inner ring (locates in one direction)
3 Diameter series Diameter series 3 (medium)
21 Bore Bore code 21 × 5 = 105 mm

Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.

NJ321 specifications

Specification Metric Inch Basis
Bore (d) 105 mm 4.1339 in ISO table for this designation, confirmed by supplier data
Outside diameter (D) 225 mm 8.8583 in ISO table for this designation, confirmed by supplier data
Width (B) 49 mm 1.9291 in ISO table for this designation, confirmed by supplier data
Bearing type Cylindrical roller bearing Stated by the designation
Seals / shields Open (no seals or shields) Stated by the designation
Internal clearance Normal (CN): no clearance code in the designation Stated by the designation
Tolerance class Normal (ISO P0 / ABEC 1): no tolerance-class code Stated by the designation

NJ321 is a cylindrical roller bearing, 105 mm bore × 225 mm OD × 49 mm wide (4.1339 × 8.8583 × 1.9291 in).

The NJ321 is a cylindrical roller bearing with a 105mm bore diameter, 225mm outside diameter, and 49mm width. This single-row design features high radial load capacity and allows axial displacement of the shaft relative to the housing, making it suitable for applications where thermal expansion must be accommodated.

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