NU311

Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agree
$72.95 USD
$72.95 USD
Sale Sold out
Bore55 mm 2.1654 in
Outside dia.120 mm 4.7244 in
Width29 mm 1.1417 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
  • NU311 — illustration
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Image is for illustration purposes only.

What NU311 means

CodePositionMeaning
NU Type Cylindrical roller bearing, type NU: two flanges on the outer ring, none on the inner ring (inner ring can float axially)
3 Diameter series Diameter series 3 (medium)
11 Bore Bore code 11 × 5 = 55 mm

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

NU311 specifications

Specification Metric Inch Basis
Bore (d) 55 mm 2.1654 in ISO table for this designation, confirmed by supplier data
Outside diameter (D) 120 mm 4.7244 in ISO table for this designation, confirmed by supplier data
Width (B) 29 mm 1.1417 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

NU311 is a cylindrical roller bearing, 55 mm bore × 120 mm OD × 29 mm wide (2.1654 × 4.7244 × 1.1417 in).

The NU311 is a cylindrical roller bearing with a 55mm bore diameter, 120mm outside diameter, and 29mm width. This single-row bearing design features high radial load capacity and allows for axial displacement of the shaft relative to the housing.

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