NU309

Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agree
$47.95 USD
$47.95 USD
Sale Sold out
Bore45 mm 1.7717 in
Outside dia.100 mm 3.937 in
Width25 mm 0.9843 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
  • NU309 — illustration
1 1

Image is for illustration purposes only.

What NU309 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)
09 Bore Bore code 09 × 5 = 45 mm

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

NU309 specifications

Specification Metric Inch Basis
Bore (d) 45 mm 1.7717 in ISO table for this designation, confirmed by supplier data
Outside diameter (D) 100 mm 3.937 in ISO table for this designation, confirmed by supplier data
Width (B) 25 mm 0.9843 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

NU309 is a cylindrical roller bearing, 45 mm bore × 100 mm OD × 25 mm wide (1.7717 × 3.937 × 0.9843 in).

The NU309 is a single-row cylindrical roller bearing with a 45mm bore diameter, 100mm outside diameter, and 25mm width. This bearing 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.

Related sizes & variants

Browse all Cylindrical Roller Bearings →