NU307-C3
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What NU307-C3 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) |
07 |
Bore | Bore code 07 × 5 = 35 mm |
C3 |
Internal clearance | C3: radial internal clearance greater than Normal |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
NU307-C3 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 35 mm | 1.378 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 80 mm | 3.1496 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 21 mm | 0.8268 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 | C3 (greater than Normal) | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
NU307-C3 is a cylindrical roller bearing, 35 mm bore × 80 mm OD × 21 mm wide (1.378 × 3.1496 × 0.8268 in). It has C3 internal clearance.
The NU307-C3 is a single-row cylindrical roller bearing with a 35mm bore, 80mm outside diameter, and 21mm width. The NU design features an inner ring with two integral ribs and an outer ring without ribs, allowing for axial displacement to accommodate thermal expansion. The C3 radial clearance provides greater internal clearance than standard, suitable for applications with thermal growth or interference fits.
