NU328-C4
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What NU328-C4 means
| Code | Position | Meaning |
|---|---|---|
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) |
28 |
Bore | Bore code 28 × 5 = 140 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.
NU328-C4 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 140 mm | 5.5118 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 300 mm | 11.811 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 62 mm | 2.4409 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 | |
NU328-C4 is a cylindrical roller bearing, 140 mm bore × 300 mm OD × 62 mm wide (5.5118 × 11.811 × 2.4409 in). It has C4 internal clearance.
The NU328-C4 is a single row cylindrical roller bearing with a 140mm bore diameter, 300mm outside diameter, and 62mm width. The NU design features a separable inner ring with fixed outer ring ribs, allowing for free axial displacement of the shaft relative to the housing. The C4 radial clearance designation provides greater internal clearance than standard, accommodating thermal expansion and misalignment conditions.
