N311

Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agree
$101.00 USD
$101.00 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
  • N311 — illustration
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Image is for illustration purposes only.

What N311 means

CodePositionMeaning
N Type Cylindrical roller bearing, type N: two flanges on the inner ring, none on the outer ring
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.

N311 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

N311 is a cylindrical roller bearing, 55 mm bore × 120 mm OD × 29 mm wide (2.1654 × 4.7244 × 1.1417 in).

The N311 is a single-row cylindrical roller bearing with bore diameter 55mm, outside diameter 120mm, and width 29mm. Cylindrical roller bearings feature line contact between rollers and raceways, providing high radial load capacity and allowing for axial displacement of the shaft relative to the housing.

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