N308-C4
Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agreeRegular price
$56.95 USD
Regular price
Sale price
$56.95 USD
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Bore40 mm
1.5748 in
Outside dia.90 mm
3.5433 in
Width23 mm
0.9055 in
TypeCylindrical roller bearing
SealingOpen
ClearanceC4
Ships separately from our European warehouse — shipping from $79, quoted at checkout
Ships from our European partner stock — allow 5–8 business days
Ships from our European partner stock — allow 5–8 business days
Image is for illustration purposes only.
What N308-C4 means
| Code | Position | Meaning |
|---|---|---|
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) |
08 |
Bore | Bore code 08 × 5 = 40 mm |
C4 |
Internal clearance | C4: radial internal clearance greater than C3 |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
N308-C4 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 40 mm | 1.5748 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 90 mm | 3.5433 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 23 mm | 0.9055 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 | C4 (greater than C3) | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
N308-C4 is a cylindrical roller bearing, 40 mm bore × 90 mm OD × 23 mm wide (1.5748 × 3.5433 × 0.9055 in). It has C4 internal clearance.
The N308-C4 is a cylindrical roller bearing with a 40mm bore diameter, 90mm outside diameter, and 23mm width. This single-row bearing features C4 radial internal clearance, which is greater than C3 and provides additional clearance for applications with thermal expansion or shaft/housing fits requiring extra play.
Inner Diameter (ID)
40 mm
Outside Diameter (OD)
90 mm
Width
23 mm
Series
N3
Bearing Type
Cylindrical roller bearing
